保存numpy的矩阵 [英] Save a numpy matrix

问题描述

我有一个三维数组，我想获得沿X-Y 2D图像以Z的每一点的最大值，并保存为一个numpy的数组。

I have a 3D array and I would like to obtain a 2D image along X-Y with the maximum value of z at each point and save it as a numpy array.

import numpy as num
matrix=num.load('3d')
nx,ny,nz=num.shape(matrix)
CXY=num.zeros([ny, nx])
    for i in range(ny):
        for j in range(nx):
            CXY[i,j]=num.max(matrix[j,i,:])

的问题是保存所得到的矩阵。我想它numpy.save保存，但我总是得到一个空数组。有没有人有任何建议妥善保存所得到的阵列？

The problem is to save the obtained matrix. I would like to save it with numpy.save but I always get an empty array. Does anyone have suggestions to properly save the obtained array?

我只是用num.save：

I just used num.save:

num.save（最大，CXY [I，J]）

num.save('max', CXY[i,j])

推荐答案

我猜你正在寻找它保存在一个可读的格式，而不是其保存为二进制格式numpy.save的numpy.savetxt。

I guess that you're looking for the numpy.savetxt which saves in a human readable format instead of the numpy.save which saves as a binary format.

import numpy as np
matrix=np.random.random((10,10,42))
nx,ny,nz=np.shape(matrix)
CXY=np.zeros([ny, nx])
for i in range(ny):
    for j in range(nx):
        CXY[i,j]=np.max(matrix[j,i,:])

#Binary data
np.save('maximums.npy', CXY)

#Human readable data
np.savetxt('maximums.txt', CXY)

这code第一次作为一个二进制文件，然后你可以在一个普通的文本编辑器打开一个文件保存阵列。

This code saves the array first as a binary file and then as a file you can open in a regular text editor.

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