回答編集履歴
2
追記
test
CHANGED
|
@@ -93,3 +93,71 @@
|
|
|
93
93
|
|
|
94
94
|
|
|
95
95
|
分かり易いと思う方を使えば良いのではないでしょうか。
|
|
96
|
+
|
|
97
|
+
|
|
98
|
+
|
|
99
|
+
なぜ reshape(3, -3) でも動作するか？
|
|
100
|
+
|
|
101
|
+
---
|
|
102
|
+
|
|
103
|
+
実装で dimensions[i] == -1 ではなく dimensions[i] < 0 が判定に用いられているから。
|
|
104
|
+
|
|
105
|
+
|
|
106
|
+
|
|
107
|
+
> ```C
|
|
108
|
+
|
|
109
|
+
> for (i = 0; i < n; i++) {
|
|
110
|
+
|
|
111
|
+
if (dimensions[i] < 0) {
|
|
112
|
+
|
|
113
|
+
if (i_unknown == -1) {
|
|
114
|
+
|
|
115
|
+
i_unknown = i;
|
|
116
|
+
|
|
117
|
+
}
|
|
118
|
+
|
|
119
|
+
else {
|
|
120
|
+
|
|
121
|
+
PyErr_SetString(PyExc_ValueError,
|
|
122
|
+
|
|
123
|
+
"can only specify one unknown dimension");
|
|
124
|
+
|
|
125
|
+
return -1;
|
|
126
|
+
|
|
127
|
+
}
|
|
128
|
+
|
|
129
|
+
}
|
|
130
|
+
|
|
131
|
+
else if (npy_mul_with_overflow_intp(&s_known, s_known,
|
|
132
|
+
|
|
133
|
+
dimensions[i])) {
|
|
134
|
+
|
|
135
|
+
raise_reshape_size_mismatch(newshape, arr);
|
|
136
|
+
|
|
137
|
+
return -1;
|
|
138
|
+
|
|
139
|
+
}
|
|
140
|
+
|
|
141
|
+
}
|
|
142
|
+
|
|
143
|
+
|
|
144
|
+
|
|
145
|
+
> if (i_unknown >= 0) {
|
|
146
|
+
|
|
147
|
+
if (s_known == 0 || s_original % s_known != 0) {
|
|
148
|
+
|
|
149
|
+
raise_reshape_size_mismatch(newshape, arr);
|
|
150
|
+
|
|
151
|
+
return -1;
|
|
152
|
+
|
|
153
|
+
}
|
|
154
|
+
|
|
155
|
+
dimensions[i_unknown] = s_original / s_known;
|
|
156
|
+
|
|
157
|
+
}
|
|
158
|
+
|
|
159
|
+
> ```
|
|
160
|
+
|
|
161
|
+
|
|
162
|
+
|
|
163
|
+
[numpy/shape.c at v1.17.4 · numpy/numpy · GitHub](https://github.com/numpy/numpy/blob/v1.17.4/numpy/core/src/multiarray/shape.c#L472)
|
1
修正
test
CHANGED
|
@@ -2,11 +2,11 @@
|
|
|
2
2
|
|
|
3
3
|
|
|
4
4
|
|
|
5
|
-
> **newshape : int or tuple of ints**
|
|
5
|
+
> #####**newshape : int or tuple of ints**
|
|
6
6
|
|
|
7
|
-
The new shape should be compatible with the original shape. If an integer, then the result will be a 1-D array of that length.
|
|
7
|
+
The new shape should be compatible with the original shape. If an integer, then the result will be a 1-D array of that length.
|
|
8
8
|
|
|
9
|
-
In this case, the value is inferred from the length of the array and remaining dimensions.
|
|
9
|
+
**One shape dimension can be -1**. In this case, the value is inferred from the length of the array and remaining dimensions.
|
|
10
10
|
|
|
11
11
|
|
|
12
12
|
|