回答編集履歴
3
余計なもの削除
test
CHANGED
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@@ -338,10 +338,6 @@
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[["平均",...av,"--","--"]].reduce (row, document.querySelector ('#hoge tfoot'));
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-
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-
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-
console.log(av,std);
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-
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</script>
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```
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2
ちょっと見直し
test
CHANGED
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@@ -220,10 +220,128 @@
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</script>
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```
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見直ししました。
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同点の場合の順番の付加方法の変更。それにともなうソートの省略。
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平均の表示を少数をまるめる。
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かなり短くなりました。
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```js
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<!DOCTYPE html>
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<html lang="ja">
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<meta charset="UTF-8">
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<title>ユーザクラスの作成</title>
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<style>
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#hoge thead th { background: green; color: white }
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#hoge tr td:first-of-type { background: rgba(0,200,0,.1)}
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#hoge tr td:nth-of-type(n-1) { text-align: right; }
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#hoge tfoot {background: rgba(255,0,0,.1)}
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#hoge tr td:nth-of-type(n+7) { background: rgba(0,0,255,.1);}
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</style>
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<body>
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<table border="1" id="hoge">
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<thead>
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<tr><th>生徒 <th>国語 <th>数学 <th>理科 <th>社会 <th>英語 <th>合計値 <th>ランク <th>偏差値
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<tbody>
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<tfoot>
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</table>
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<script>
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const
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data = [
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["Aさん", 80, 70, 70, 50, 60],
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["Bさん", 60, 70, 40, 80, 60],
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["Cさん", 60, 70, 70, 60, 60],
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["Dさん", 80, 40, 40, 70, 70],
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["Eさん", 70, 70, 70, 60, 70],
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["Fさん", 50, 70, 70, 60, 90],
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],
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len = data.length,
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sum = (a, b)=> a + b,
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cell = (r, c) => (r.insertCell ().textContent = c, r),
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row = (t, r) => (r.reduce (cell, t.insertRow ()), t);
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//合計値を計算し配列の最後に追加、ついでに成績順追加
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data.forEach (r => r.push (r.slice (1).reduce (sum)));
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//平均
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let av = data.reduce((a,r)=>(r.slice(1,7).forEach((r,i)=>a[i]=r+(a[i]||0)),a),[]).map(a=>(a/len).toFixed(1));
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//合計値の標準偏差
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let std = (data.map (r=>(r[6]-av[5])**2).reduce(sum)/len)**.5;
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//成績順を付加
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data.forEach (r=> r[7]= data.filter (q => r[6] < q[6]).length + 1);
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//偏差値計算
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data.forEach (r=> r[8] = ((r[6]-av[5])/std * 10 + 50).toFixed(2));
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//表を生成
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data.reduce (row, document.querySelector ('#hoge tbody'));
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[["平均",...av,"--","--"]].reduce (row, document.querySelector ('#hoge tfoot'));
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340
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341
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342
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223
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console.log(av,std);
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225
345
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</script>
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-
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-
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229
347
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```
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1
蛇足
test
CHANGED
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@@ -103,3 +103,127 @@
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103
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```
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偏差値は必要ないの？
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```html
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<!DOCTYPE html>
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<html lang="ja">
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<meta charset="UTF-8">
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<title>ユーザクラスの作成</title>
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<style>
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#hoge thead th { background: green; color: white }
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#hoge tr td:first-of-type { background: rgba(0,200,0,.1)}
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#hoge tr td:nth-of-type(n-1) { text-align: right; }
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#hoge tfoot {background: rgba(255,0,0,.1)}
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#hoge tr td:nth-of-type(n+7) { background: rgba(0,0,255,.1);}
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</style>
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<body>
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<table border="1" id="hoge">
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<thead>
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<tr><th>生徒 <th>国語 <th>数学 <th>理科 <th>社会 <th>英語 <th>合計値 <th>ランク <th>偏差値
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<tbody>
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<tfoot>
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</table>
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<script>
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const
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data = [
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["Aさん", 80, 70, 70, 50, 60],
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["Bさん", 60, 70, 40, 80, 60],
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["Cさん", 60, 70, 70, 60, 60],
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["Dさん", 80, 40, 40, 70, 70],
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["Eさん", 70, 70, 70, 60, 70],
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],
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sum = (a, b)=> a + b,
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order = (a, b)=> a[6] !== b[6] ? a[6] < b[6]: false,
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order2 = (a, b)=> a[9] > b[9],
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cell = (r, c) => (r.insertCell ().textContent = c, r),
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row = (t, r) => (r.reduce (cell, t.insertRow ()), t);
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//合計値を計算し配列の最後に追加、ついでに成績順と連番も追加
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data.forEach ((rec, idx) => rec.push (rec.slice (1).reduce (sum), 0, 0, idx));
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//平均
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let av = data.reduce((a,r)=>(r.slice(1,7).forEach((r,i)=>a[i]=r+(a[i]||0)),a),[]).map(a=>a/data.length);
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//合計値の標準偏差
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let std = (data.map (r=>(r[6]-av[5])**2).reduce(sum)/data.length)**.5;
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//偏差値計算
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data.forEach (rec=> rec[8] = ((rec[6]-av[5])/std * 10 +50).toFixed(2));
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//成績順で並び替え
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data.sort (order);
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//成績順の番号を付加
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data.forEach ((rec, i)=> rec[7] = i + 1);
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//元に戻す
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data.sort (order2);
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//連番は捨てる
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data.forEach (rec=> rec.pop ());
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//表を生成
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216
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data.reduce (row, document.querySelector ('#hoge tbody'));
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218
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+
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219
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[["平均",...av,"--","--"]].reduce (row, document.querySelector ('#hoge tfoot'));
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220
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+
|
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221
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+
|
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222
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+
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223
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+
console.log(av,std);
|
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224
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+
|
|
225
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+
</script>
|
|
226
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+
|
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227
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+
|
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228
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+
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229
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+
```
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