質問編集履歴
4
fromの位置を変更しました。document.writeに書き換えました
test
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test
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@@ -16,11 +16,7 @@
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エラーメッセージ
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```Uncaught TypeError: Cannot read property 'b' of undefined
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```
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Cannot read property 'value' of null at nibun1013.html:40
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@@ -56,218 +52,214 @@
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</style>
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</head>
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<body>
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<form name="nibun">
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<label>aの値</label>
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<input type="number" name="a" value="0" step="0.01">
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<input type="button" value="表示" onclick="disp1()">
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<br>
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<label>bの値</label>
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<input type="number" name="b" value="0" step="0.01">
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<input type="button" value="表示" onclick="disp2()">
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</form>
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<!-- ── キャンバス ── -->
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<!-- ── キャンバス ── -->
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<canvas id="graph" width="800" height="600"></canvas>
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<canvas id="graph" width="800" height="600"></canvas>
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<script>
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/* ── 評価する関数 ── */
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const F = x => x*x*2-3 //アロー関数
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/* ── 関数：二分法 ── */
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const bisection = ( f, a, b, e ) => { //bisecetion 二等分
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if( a>=b || f( a )*f( b )>=0 ){ return }
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const slope = f( b )-f( a ); //slope 傾斜
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let mid;
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do {
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mid = ( a+b )/2;
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a =
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f( mid )>0 ? ( slope>0 ? a : mid ) :
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f( mid )<0 ? ( slope>0 ? mid : a ) : mid ;
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b =
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f( mid )>0 ? ( slope>0 ? mid : b ) :
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f( mid )<0 ? ( slope>0 ? b : mid ) : mid ;
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} while( b-a>e );
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return mid ;
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}
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var x_a=0,x_b=0;
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x_b=document.querySelector([name="b"]).value;
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x_a=document.nibun.querySelector([name="a"]).value;
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/* ── 二文法を実行 ── */
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function disp1(){
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x_a==document.nibun.x_a.value;
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}
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function disp2(){
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x_b==document.nibun.x_b.value;
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}
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const result = bisection( F, a,b, 0.0001 );
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console.log( result );
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/* ── グラフ描画 ── */
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// キャンバス
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const canvas = document.getElementById( "graph" );
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const width = canvas.width, height = canvas.height;
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// コンテキスト
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const context = canvas.getContext( "2d" );
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// 座標
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const rate = width*0.1;//元は0.1
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const range = { x: 4.5, y: 3.5 };
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const cx = result || 0, cy = 0; //result:関数の答え
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const uo = width/2-cx*rate, vo = height/2+cy*rate; //uo:幅、vo:高さ、
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const u = x => uo+x*rate;
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const v = y => vo-y*rate;
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// 描画：座標軸
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context.strokeStyle = "#999"; //ネズミ色
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context.lineWidth = 1; //線の幅
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context.beginPath();
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context.moveTo( u( cx-range.x ), vo );
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context.lineTo( u( cx+range.x ), vo );
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context.moveTo( uo, v( cy-range.y ) );
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context.lineTo( uo, v( cy+range.y ) );
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context.stroke();
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// 描画：グラフ
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context.strokeStyle = "#666";
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context.lineWidth = 2;
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context.beginPath();
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context.moveTo( u( cx-range.x ), v( F( cy-range.x ) ) );
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for( x=cx-range.x; x<=cy+range.x; x+=0.01 ){
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context[ F(x)<range.y && F(x)<range.y ? "lineTo": "moveTo" ]( u( x ), v( F(x) ) );
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}
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//x,yの座標を描画
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context.stroke();
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// 描画：二分法の解
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if( result !== undefined ){
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context.fillStyle = "#fcc"; //赤
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context.strokeStyle = "#f00";//赤
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context.lineWidth = 1;
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context.beginPath();
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context.arc( u( result ), vo, 8, 0, Math.PI*2 ); //円弧を作成する、（円弧の中心、半径、開始角度、終了角度）
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//doucument.write(u(result));
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context.fill();
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context.stroke();
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}
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//描画：赤線、青線
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//const draw = bisection( F, 0, 2, 0.0001 );
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const uresult = u(result);
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document.write("答え：");
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document.write(result); //writelnで改行
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document.write(uresult);
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</script>
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<!-- ── スクリプト ── -->
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<script>
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/* ── 評価する関数 ── */
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78
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-
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79
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const F = x => x*x*2-3 //アロー関数
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80
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-
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81
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82
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/* ── 関数：二分法 ── */
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84
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85
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const bisection = ( f, a, b, e ) => { //bisecetion 二等分
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86
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-
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87
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if( a>=b || f( a )*f( b )>=0 ){ return }
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88
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-
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89
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const slope = f( b )-f( a ); //slope 傾斜
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90
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-
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91
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let mid;
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92
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-
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93
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do {
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94
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mid = ( a+b )/2;
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96
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-
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97
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a =
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98
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-
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f( mid )>0 ? ( slope>0 ? a : mid ) :
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f( mid )<0 ? ( slope>0 ? mid : a ) : mid ;
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b =
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f( mid )>0 ? ( slope>0 ? mid : b ) :
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f( mid )<0 ? ( slope>0 ? b : mid ) : mid ;
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} while( b-a>e );
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return mid ;
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}
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var x_a=0,x_b=0;
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x_b=document.nibun.b.value;
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x_a=document.nibun.a.value;
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/* ── 二文法を実行 ── */
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122
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123
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function disp1(){
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124
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x_a==document.nibun.x_a.value;
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}
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function disp2(){
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x_b==document.nibun.x_b.value;
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}
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const result = bisection( F, a,b, 0.0001 );
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console.log( result );
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/* ── グラフ描画 ── */
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143
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// キャンバス
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144
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-
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const canvas = document.getElementById( "graph" );
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const width = canvas.width, height = canvas.height;
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// コンテキスト
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const context = canvas.getContext( "2d" );
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153
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// 座標
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154
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-
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155
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const rate = width*0.1;//元は0.1
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156
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-
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157
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const range = { x: 4.5, y: 3.5 };
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158
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-
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159
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const cx = result || 0, cy = 0; //result:関数の答え
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160
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-
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161
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const uo = width/2-cx*rate, vo = height/2+cy*rate; //uo:幅、vo:高さ、
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-
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const u = x => uo+x*rate;
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const v = y => vo-y*rate;
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-
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167
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168
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169
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-
// 描画：座標軸
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170
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-
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171
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context.strokeStyle = "#999"; //ネズミ色
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-
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context.lineWidth = 1; //線の幅
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-
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context.beginPath();
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context.moveTo( u( cx-range.x ), vo );
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context.lineTo( u( cx+range.x ), vo );
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context.moveTo( uo, v( cy-range.y ) );
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context.lineTo( uo, v( cy+range.y ) );
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context.stroke();
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-
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// 描画：グラフ
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-
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context.strokeStyle = "#666";
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context.lineWidth = 2;
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context.beginPath();
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context.moveTo( u( cx-range.x ), v( F( cy-range.x ) ) );
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for( x=cx-range.x; x<=cy+range.x; x+=0.01 ){
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context[ F(x)<range.y && F(x)<range.y ? "lineTo": "moveTo" ]( u( x ), v( F(x) ) );
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-
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}
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-
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205
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//x,yの座標を描画
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206
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-
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207
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context.stroke();
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208
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-
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209
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-
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210
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-
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211
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-
// 描画：二分法の解
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212
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-
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|
213
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-
if( result !== undefined ){
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214
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-
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215
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-
context.fillStyle = "#fcc"; //赤
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216
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-
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217
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context.strokeStyle = "#f00";//赤
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218
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-
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context.lineWidth = 1;
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220
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-
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context.beginPath();
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222
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-
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223
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context.arc( u( result ), vo, 8, 0, Math.PI*2 ); //円弧を作成する、（円弧の中心、半径、開始角度、終了角度）
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224
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-
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225
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//doucument.write(u(result));
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|
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|
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227
|
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context.fill();
|
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|
-
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|
-
context.stroke();
|
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230
|
-
|
|
231
|
-
}
|
|
232
|
-
|
|
233
|
-
//描画：赤線、青線
|
|
234
|
-
|
|
235
|
-
//const draw = bisection( F, 0, 2, 0.0001 );
|
|
236
|
-
|
|
237
|
-
const uresult = u(result);
|
|
238
|
-
|
|
239
|
-
document.writeln("答え：");
|
|
240
|
-
|
|
241
|
-
document.writeln(result); //writelnで改行
|
|
242
|
-
|
|
243
|
-
document.writeln(uresult);
|
|
244
|
-
|
|
245
|
-
</script>
|
|
246
|
-
|
|
247
|
-
</body>
|
|
257
|
+
</body>
|
|
248
|
-
|
|
249
|
-
<br>
|
|
250
|
-
|
|
251
|
-
<FORM name="nibun">
|
|
252
|
-
|
|
253
|
-
<label>aの値</label>
|
|
254
|
-
|
|
255
|
-
<input type="number" name="a" value="0" step="0.01">
|
|
256
|
-
|
|
257
|
-
<input type="button" value="表示" onclick="disp1()">
|
|
258
|
-
|
|
259
|
-
<br>
|
|
260
|
-
|
|
261
|
-
<label>bの値</label>
|
|
262
|
-
|
|
263
|
-
<input type="number" name="b" value="0" step="0.01">
|
|
264
|
-
|
|
265
|
-
<input type="button" value="表示" onclick="disp2()">
|
|
266
|
-
|
|
267
|
-
</FORM>
|
|
268
258
|
|
|
269
259
|
</html>
|
|
270
260
|
|
|
261
|
+
|
|
262
|
+
|
|
271
263
|
```
|
|
272
264
|
|
|
273
265
|
|
3
documentを変更しました。
test
CHANGED
|
File without changes
|
test
CHANGED
|
@@ -22,6 +22,10 @@
|
|
|
22
22
|
|
|
23
23
|
|
|
24
24
|
|
|
25
|
+
Cannot read property 'value' of null at nibun1013.html:40
|
|
26
|
+
|
|
27
|
+
|
|
28
|
+
|
|
25
29
|
### 該当のソースコード
|
|
26
30
|
|
|
27
31
|
|
|
@@ -272,6 +276,12 @@
|
|
|
272
276
|
|
|
273
277
|
ここに問題に対して試したことを記載してください。
|
|
274
278
|
|
|
279
|
+
x_b=document.querySelector([name="b"]).value;
|
|
280
|
+
|
|
281
|
+
に変更しました。
|
|
282
|
+
|
|
283
|
+
|
|
284
|
+
|
|
275
285
|
参考にしたサイト
|
|
276
286
|
|
|
277
287
|
http://js.k-sakabe.com/calc_input.html
|
2
参考にしたサイトを記載しました
test
CHANGED
|
File without changes
|
test
CHANGED
|
@@ -10,6 +10,8 @@
|
|
|
10
10
|
|
|
11
11
|
テキストボックスに入力した数値がグラフに反映されません
|
|
12
12
|
|
|
13
|
+
テキストボックスでは二分法に必要な範囲の数値を入力する予定です。
|
|
14
|
+
|
|
13
15
|
```
|
|
14
16
|
|
|
15
17
|
エラーメッセージ
|
|
@@ -120,8 +122,6 @@
|
|
|
120
122
|
|
|
121
123
|
}
|
|
122
124
|
|
|
123
|
-
|
|
124
|
-
|
|
125
125
|
function disp2(){
|
|
126
126
|
|
|
127
127
|
x_b==document.nibun.x_b.value;
|
|
@@ -272,7 +272,9 @@
|
|
|
272
272
|
|
|
273
273
|
ここに問題に対して試したことを記載してください。
|
|
274
274
|
|
|
275
|
-
|
|
275
|
+
参考にしたサイト
|
|
276
|
+
|
|
277
|
+
http://js.k-sakabe.com/calc_input.html
|
|
276
278
|
|
|
277
279
|
### 補足情報（FW/ツールのバージョンなど）
|
|
278
280
|
|
1
dispを追加しました
test
CHANGED
|
File without changes
|
test
CHANGED
|
@@ -14,256 +14,270 @@
|
|
|
14
14
|
|
|
15
15
|
エラーメッセージ
|
|
16
16
|
|
|
17
|
+
```Uncaught TypeError: Cannot read property 'b' of undefined
|
|
18
|
+
|
|
19
|
+
at nibun1013.html:40
|
|
20
|
+
|
|
21
|
+
|
|
22
|
+
|
|
23
|
+
### 該当のソースコード
|
|
24
|
+
|
|
25
|
+
|
|
26
|
+
|
|
27
|
+
```ここに言語名を入力
|
|
28
|
+
|
|
29
|
+
Javascript
|
|
30
|
+
|
|
31
|
+
ソースコード
|
|
32
|
+
|
|
33
|
+
<!DOCTYPE html>
|
|
34
|
+
|
|
35
|
+
<html>
|
|
36
|
+
|
|
37
|
+
<head>
|
|
38
|
+
|
|
39
|
+
<meta charset="utf-8">
|
|
40
|
+
|
|
41
|
+
<title>ページタイトル</title>
|
|
42
|
+
|
|
43
|
+
|
|
44
|
+
|
|
45
|
+
<!-- ── スタイルシート ── -->
|
|
46
|
+
|
|
47
|
+
<style>
|
|
48
|
+
|
|
49
|
+
#graph { background: #eee; }
|
|
50
|
+
|
|
51
|
+
</style>
|
|
52
|
+
|
|
53
|
+
|
|
54
|
+
|
|
55
|
+
</head>
|
|
56
|
+
|
|
57
|
+
<body>
|
|
58
|
+
|
|
59
|
+
|
|
60
|
+
|
|
61
|
+
<!-- ── キャンバス ── -->
|
|
62
|
+
|
|
63
|
+
<canvas id="graph" width="800" height="600"></canvas>
|
|
64
|
+
|
|
65
|
+
|
|
66
|
+
|
|
67
|
+
<!-- ── スクリプト ── -->
|
|
68
|
+
|
|
69
|
+
<script>
|
|
70
|
+
|
|
71
|
+
/* ── 評価する関数 ── */
|
|
72
|
+
|
|
73
|
+
const F = x => x*x*2-3 //アロー関数
|
|
74
|
+
|
|
75
|
+
|
|
76
|
+
|
|
77
|
+
/* ── 関数：二分法 ── */
|
|
78
|
+
|
|
79
|
+
const bisection = ( f, a, b, e ) => { //bisecetion 二等分
|
|
80
|
+
|
|
81
|
+
if( a>=b || f( a )*f( b )>=0 ){ return }
|
|
82
|
+
|
|
83
|
+
const slope = f( b )-f( a ); //slope 傾斜
|
|
84
|
+
|
|
85
|
+
let mid;
|
|
86
|
+
|
|
87
|
+
do {
|
|
88
|
+
|
|
89
|
+
mid = ( a+b )/2;
|
|
90
|
+
|
|
91
|
+
a =
|
|
92
|
+
|
|
93
|
+
f( mid )>0 ? ( slope>0 ? a : mid ) :
|
|
94
|
+
|
|
95
|
+
f( mid )<0 ? ( slope>0 ? mid : a ) : mid ;
|
|
96
|
+
|
|
97
|
+
b =
|
|
98
|
+
|
|
99
|
+
f( mid )>0 ? ( slope>0 ? mid : b ) :
|
|
100
|
+
|
|
101
|
+
f( mid )<0 ? ( slope>0 ? b : mid ) : mid ;
|
|
102
|
+
|
|
103
|
+
} while( b-a>e );
|
|
104
|
+
|
|
105
|
+
return mid ;
|
|
106
|
+
|
|
107
|
+
}
|
|
108
|
+
|
|
109
|
+
var x_a=0,x_b=0;
|
|
110
|
+
|
|
111
|
+
x_b=document.nibun.b.value;
|
|
112
|
+
|
|
113
|
+
x_a=document.nibun.a.value;
|
|
114
|
+
|
|
115
|
+
/* ── 二文法を実行 ── */
|
|
116
|
+
|
|
117
|
+
function disp1(){
|
|
118
|
+
|
|
119
|
+
x_a==document.nibun.x_a.value;
|
|
120
|
+
|
|
121
|
+
}
|
|
122
|
+
|
|
123
|
+
|
|
124
|
+
|
|
125
|
+
function disp2(){
|
|
126
|
+
|
|
127
|
+
x_b==document.nibun.x_b.value;
|
|
128
|
+
|
|
129
|
+
}
|
|
130
|
+
|
|
131
|
+
|
|
132
|
+
|
|
133
|
+
const result = bisection( F, a,b, 0.0001 );
|
|
134
|
+
|
|
135
|
+
console.log( result );
|
|
136
|
+
|
|
137
|
+
/* ── グラフ描画 ── */
|
|
138
|
+
|
|
139
|
+
// キャンバス
|
|
140
|
+
|
|
141
|
+
const canvas = document.getElementById( "graph" );
|
|
142
|
+
|
|
143
|
+
const width = canvas.width, height = canvas.height;
|
|
144
|
+
|
|
145
|
+
// コンテキスト
|
|
146
|
+
|
|
147
|
+
const context = canvas.getContext( "2d" );
|
|
148
|
+
|
|
149
|
+
// 座標
|
|
150
|
+
|
|
151
|
+
const rate = width*0.1;//元は0.1
|
|
152
|
+
|
|
153
|
+
const range = { x: 4.5, y: 3.5 };
|
|
154
|
+
|
|
155
|
+
const cx = result || 0, cy = 0; //result:関数の答え
|
|
156
|
+
|
|
157
|
+
const uo = width/2-cx*rate, vo = height/2+cy*rate; //uo:幅、vo:高さ、
|
|
158
|
+
|
|
159
|
+
const u = x => uo+x*rate;
|
|
160
|
+
|
|
161
|
+
const v = y => vo-y*rate;
|
|
162
|
+
|
|
163
|
+
|
|
164
|
+
|
|
165
|
+
// 描画：座標軸
|
|
166
|
+
|
|
167
|
+
context.strokeStyle = "#999"; //ネズミ色
|
|
168
|
+
|
|
169
|
+
context.lineWidth = 1; //線の幅
|
|
170
|
+
|
|
171
|
+
context.beginPath();
|
|
172
|
+
|
|
173
|
+
context.moveTo( u( cx-range.x ), vo );
|
|
174
|
+
|
|
175
|
+
context.lineTo( u( cx+range.x ), vo );
|
|
176
|
+
|
|
177
|
+
context.moveTo( uo, v( cy-range.y ) );
|
|
178
|
+
|
|
179
|
+
context.lineTo( uo, v( cy+range.y ) );
|
|
180
|
+
|
|
181
|
+
context.stroke();
|
|
182
|
+
|
|
183
|
+
|
|
184
|
+
|
|
185
|
+
// 描画：グラフ
|
|
186
|
+
|
|
187
|
+
context.strokeStyle = "#666";
|
|
188
|
+
|
|
189
|
+
context.lineWidth = 2;
|
|
190
|
+
|
|
191
|
+
context.beginPath();
|
|
192
|
+
|
|
193
|
+
context.moveTo( u( cx-range.x ), v( F( cy-range.x ) ) );
|
|
194
|
+
|
|
195
|
+
for( x=cx-range.x; x<=cy+range.x; x+=0.01 ){
|
|
196
|
+
|
|
197
|
+
context[ F(x)<range.y && F(x)<range.y ? "lineTo": "moveTo" ]( u( x ), v( F(x) ) );
|
|
198
|
+
|
|
199
|
+
}
|
|
200
|
+
|
|
201
|
+
//x,yの座標を描画
|
|
202
|
+
|
|
203
|
+
context.stroke();
|
|
204
|
+
|
|
205
|
+
|
|
206
|
+
|
|
207
|
+
// 描画：二分法の解
|
|
208
|
+
|
|
209
|
+
if( result !== undefined ){
|
|
210
|
+
|
|
211
|
+
context.fillStyle = "#fcc"; //赤
|
|
212
|
+
|
|
213
|
+
context.strokeStyle = "#f00";//赤
|
|
214
|
+
|
|
215
|
+
context.lineWidth = 1;
|
|
216
|
+
|
|
217
|
+
context.beginPath();
|
|
218
|
+
|
|
219
|
+
context.arc( u( result ), vo, 8, 0, Math.PI*2 ); //円弧を作成する、（円弧の中心、半径、開始角度、終了角度）
|
|
220
|
+
|
|
221
|
+
//doucument.write(u(result));
|
|
222
|
+
|
|
223
|
+
context.fill();
|
|
224
|
+
|
|
225
|
+
context.stroke();
|
|
226
|
+
|
|
227
|
+
}
|
|
228
|
+
|
|
229
|
+
//描画：赤線、青線
|
|
230
|
+
|
|
231
|
+
//const draw = bisection( F, 0, 2, 0.0001 );
|
|
232
|
+
|
|
233
|
+
const uresult = u(result);
|
|
234
|
+
|
|
235
|
+
document.writeln("答え：");
|
|
236
|
+
|
|
237
|
+
document.writeln(result); //writelnで改行
|
|
238
|
+
|
|
239
|
+
document.writeln(uresult);
|
|
240
|
+
|
|
241
|
+
</script>
|
|
242
|
+
|
|
243
|
+
</body>
|
|
244
|
+
|
|
245
|
+
<br>
|
|
246
|
+
|
|
247
|
+
<FORM name="nibun">
|
|
248
|
+
|
|
249
|
+
<label>aの値</label>
|
|
250
|
+
|
|
251
|
+
<input type="number" name="a" value="0" step="0.01">
|
|
252
|
+
|
|
253
|
+
<input type="button" value="表示" onclick="disp1()">
|
|
254
|
+
|
|
255
|
+
<br>
|
|
256
|
+
|
|
257
|
+
<label>bの値</label>
|
|
258
|
+
|
|
259
|
+
<input type="number" name="b" value="0" step="0.01">
|
|
260
|
+
|
|
261
|
+
<input type="button" value="表示" onclick="disp2()">
|
|
262
|
+
|
|
263
|
+
</FORM>
|
|
264
|
+
|
|
265
|
+
</html>
|
|
266
|
+
|
|
17
267
|
```
|
|
18
268
|
|
|
19
269
|
|
|
20
270
|
|
|
21
|
-
### 該当のソースコード
|
|
22
|
-
|
|
23
|
-
|
|
24
|
-
|
|
25
|
-
```ここに言語名を入力
|
|
26
|
-
|
|
27
|
-
Javascript
|
|
28
|
-
|
|
29
|
-
ソースコード
|
|
30
|
-
|
|
31
|
-
<!DOCTYPE html>
|
|
32
|
-
|
|
33
|
-
<html>
|
|
34
|
-
|
|
35
|
-
<head>
|
|
36
|
-
|
|
37
|
-
<meta charset="utf-8">
|
|
38
|
-
|
|
39
|
-
<title>ページタイトル</title>
|
|
40
|
-
|
|
41
|
-
|
|
42
|
-
|
|
43
|
-
<!-- ── スタイルシート ── -->
|
|
44
|
-
|
|
45
|
-
<style>
|
|
46
|
-
|
|
47
|
-
#graph { background: #eee; }
|
|
48
|
-
|
|
49
|
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</style>
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</head>
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<body>
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<!-- ── キャンバス ── -->
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<canvas id="graph" width="800" height="600"></canvas>
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<!-- ── スクリプト ── -->
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<script>
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/* ── 評価する関数 ── */
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70
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const F = x => x*x*2-3 //アロー関数
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/* ── 関数：二分法 ── */
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const bisection = ( f, a, b, e ) => { //bisecetion 二等分
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if( a>=b || f( a )*f( b )>=0 ){ return }
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const slope = f( b )-f( a ); //slope 傾斜
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let mid;
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do {
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mid = ( a+b )/2;
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a =
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f( mid )>0 ? ( slope>0 ? a : mid ) :
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f( mid )<0 ? ( slope>0 ? mid : a ) : mid ;
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b =
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f( mid )>0 ? ( slope>0 ? mid : b ) :
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f( mid )<0 ? ( slope>0 ? b : mid ) : mid ;
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} while( b-a>e );
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return mid ;
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}
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var a,b;
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a=0;
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b=2;
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114
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/* ── 二文法を実行 ── */
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118
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const result = bisection( F, a,b, 0.0001 );
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console.log( result );
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122
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123
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/* ── グラフ描画 ── */
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// キャンバス
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const canvas = document.getElementById( "graph" );
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const width = canvas.width, height = canvas.height;
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131
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// コンテキスト
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const context = canvas.getContext( "2d" );
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135
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// 座標
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136
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137
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const rate = width*0.1;//元は0.1
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138
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139
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const range = { x: 4.5, y: 3.5 };
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140
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141
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const cx = result || 0, cy = 0; //result:関数の答え
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142
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143
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const uo = width/2-cx*rate, vo = height/2+cy*rate; //uo:幅、vo:高さ、
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144
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145
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const u = x => uo+x*rate;
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146
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const v = y => vo-y*rate;
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148
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149
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150
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151
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// 描画：座標軸
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153
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context.strokeStyle = "#999"; //ネズミ色
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154
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155
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context.lineWidth = 1; //線の幅
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156
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157
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context.beginPath();
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158
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159
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context.moveTo( u( cx-range.x ), vo );
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160
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161
|
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context.lineTo( u( cx+range.x ), vo );
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162
|
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163
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context.moveTo( uo, v( cy-range.y ) );
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164
|
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165
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context.lineTo( uo, v( cy+range.y ) );
|
|
166
|
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167
|
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context.stroke();
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168
|
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|
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169
|
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|
|
170
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|
|
171
|
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// 描画：グラフ
|
|
172
|
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|
|
173
|
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context.strokeStyle = "#666";
|
|
174
|
-
|
|
175
|
-
context.lineWidth = 2;
|
|
176
|
-
|
|
177
|
-
context.beginPath();
|
|
178
|
-
|
|
179
|
-
context.moveTo( u( cx-range.x ), v( F( cy-range.x ) ) );
|
|
180
|
-
|
|
181
|
-
for( x=cx-range.x; x<=cy+range.x; x+=0.01 ){
|
|
182
|
-
|
|
183
|
-
context[ F(x)<range.y && F(x)<range.y ? "lineTo": "moveTo" ]( u( x ), v( F(x) ) );
|
|
184
|
-
|
|
185
|
-
}
|
|
186
|
-
|
|
187
|
-
//x,yの座標を描画
|
|
188
|
-
|
|
189
|
-
context.stroke();
|
|
190
|
-
|
|
191
|
-
|
|
192
|
-
|
|
193
|
-
// 描画：二分法の解
|
|
194
|
-
|
|
195
|
-
if( result !== undefined ){
|
|
196
|
-
|
|
197
|
-
context.fillStyle = "#fcc"; //赤
|
|
198
|
-
|
|
199
|
-
context.strokeStyle = "#f00";//赤
|
|
200
|
-
|
|
201
|
-
context.lineWidth = 1;
|
|
202
|
-
|
|
203
|
-
context.beginPath();
|
|
204
|
-
|
|
205
|
-
context.arc( u( result ), vo, 8, 0, Math.PI*2 ); //円弧を作成する、（円弧の中心、半径、開始角度、終了角度）
|
|
206
|
-
|
|
207
|
-
//doucument.write(u(result));
|
|
208
|
-
|
|
209
|
-
context.fill();
|
|
210
|
-
|
|
211
|
-
context.stroke();
|
|
212
|
-
|
|
213
|
-
}
|
|
214
|
-
|
|
215
|
-
//描画：赤線、青線
|
|
216
|
-
|
|
217
|
-
//const draw = bisection( F, 0, 2, 0.0001 );
|
|
218
|
-
|
|
219
|
-
const uresult = u(result);
|
|
220
|
-
|
|
221
|
-
document.writeln("答え：");
|
|
222
|
-
|
|
223
|
-
document.writeln(result); //writelnで改行
|
|
224
|
-
|
|
225
|
-
document.writeln(uresult);
|
|
226
|
-
|
|
227
|
-
</script>
|
|
228
|
-
|
|
229
|
-
</body>
|
|
230
|
-
|
|
231
|
-
<br>
|
|
232
|
-
|
|
233
|
-
<FORM NAME="nibun01">
|
|
234
|
-
|
|
235
|
-
<label>aの値</label>
|
|
236
|
-
|
|
237
|
-
<input id ="num1"type="number" name="x_a" value="0" step="0.01">
|
|
238
|
-
|
|
239
|
-
<input type="button" value="表示" onclick="disp1()">
|
|
240
|
-
|
|
241
|
-
<br>
|
|
242
|
-
|
|
243
|
-
<label>bの値</label>
|
|
244
|
-
|
|
245
|
-
<input id ="num1"type="number" name="x_b" value="0" step="0.01">
|
|
246
|
-
|
|
247
|
-
<input type="button" value="表示" onclick="disp2()">
|
|
248
|
-
|
|
249
|
-
</FORM>
|
|
250
|
-
|
|
251
|
-
</html>
|
|
252
|
-
|
|
253
|
-
```
|
|
254
|
-
|
|
255
|
-
|
|
256
|
-
|
|
257
271
|
### 試したこと
|
|
258
272
|
|
|
259
|
-
|
|
260
|
-
|
|
261
273
|
ここに問題に対して試したことを記載してください。
|
|
262
274
|
|
|
263
275
|
|
|
264
276
|
|
|
265
277
|
### 補足情報（FW/ツールのバージョンなど）
|
|
266
278
|
|
|
267
|
-
|
|
279
|
+
Windows10 pro
|
|
280
|
+
|
|
281
|
+
テキストエディタ:viscode
|
|
268
282
|
|
|
269
283
|
ここにより詳細な情報を記載してください。
|