小编Ved*_*kib的帖子

我的代码如下所示:

from sklearn.datasets import load_svmlight_files
import numpy as np

perm1 =np.random.permutation(25000)
perm2 = np.random.permutation(25000)

X_tr, y_tr, X_te, y_te = load_svmlight_files(("dir/file.feat", "dir/file.feat"))

#randomly shuffle data
X_train = X_tr[perm1,:].toarray()[:,0:2000]
y_train = y_tr[perm1]>5 #turn into binary problem

代码工作正常,直到这里,但当我尝试将另一个对象转换为数组时,我的程序返回内存错误.

码:

X_test = X_te[perm2,:].toarray()[:,0:2000]

错误:

---------------------------------------------------------------------------
MemoryError                               Traceback (most recent call last)
<ipython-input-7-31f5e4f6b00c> in <module>()
----> 1 X_test = X_test.toarray()

C:\Users\Asq\AppData\Local\Enthought\Canopy\User\lib\site-packages\scipy\sparse\compressed.pyc in toarray(self, order, out)
    788     def toarray(self, order=None, out=None):
    789         """See the docstring for `spmatrix.toarray`."""
--> 790         return self.tocoo(copy=False).toarray(order=order, out=out)
    791 
    792     ##############################################################

C:\Users\Asq\AppData\Local\Enthought\Canopy\User\lib\site-packages\scipy\sparse\coo.pyc …

所以我有以下C代码:

for (int i = 0; i < nWallSegments; i+=4) {
  fscanf(fin, "%le %le %le %le", &wallSegments[i+0], &wallSegments[i+1], &wallSegments[i+2], &wallSegments[i+3]);
}

for (int i = 0; i < nWallSegments; i+=4) {
  nWallPoints += ceil(dist(wallSegments[i+0], wallSegments[i+1], wallSegments[i+2], wallSegments[i+3]) / dWallPoints) - 2;
  // other stuff here
}

当我尝试编译时,我收到以下错误.来自Python背景,我不知道发生了什么.我在网上搜索了答案,但没有运气.

Prog.c:44:12: error: redefinition of 'i'
  for (int i = 0; i < nWallSegments; i+=4) {
           ^
Prog.c:40:12: note: previous definition is here
  for (int i = 0; i < nWallSegments; i+=4) {c