码迷,mamicode.com
首页 > 编程语言 > 详细

Calling Matlab function from python: “initializer must be a rectangular nested sequence”

时间:2018-06-28 13:50:48      阅读:509      评论:0      收藏:0      [点我收藏+]

标签:iss   atl   gen   orm   pretty   imp   pre   nbsp   UNC   

I am writing a python script from which I hope to call the Matlab anovan function. I have attempted a basic test of this feature on file test.txt.

This file is imported as array data. In matlab, the anovan function would be called as follows:

anovan(data(:,1),{data(:,2),data(:,3)})

In python, I have attempted to call the function like this:

import matlab.engine
eng = matlab.engine.start_matlab() 
data = np.genfromtxt(‘test.txt‘)
eng.anovan(matlab.double(data[:,0]),matlab.int8(data[:,1:2]))

Unfortunately, this gives the following error:

ValueError: initializer must be a rectangular nested sequence

I can see that there is some issue in passing the last two array columns to the function, but am unsure of the solution. Any suggestions would be appreciated.


 

I have now worked this out. The issue was in the format of the data passed to the function.

#convert grouping columns to integer lists
list1 = data[:,1].tolist()
for i in range(0,len(list1)):                                                                                  
    list1[i] = int(list1[i])
list2 = data[:,2].tolist()
for i in range(0,len(list2)):                                                                                  
    list2[i] = int(list2[i])
#The following command now works
eng.anovan(matlab.double(data[:,0].tolist()),[matlab.int8(list1),matlab.int8(list2)])

Calling Matlab function from python: “initializer must be a rectangular nested sequence”

标签:iss   atl   gen   orm   pretty   imp   pre   nbsp   UNC   

原文地址:https://www.cnblogs.com/jingsupo/p/9238031.html

(0)
(0)
   
举报
评论 一句话评论(0
登录后才能评论!
© 2014 mamicode.com 版权所有  联系我们:gaon5@hotmail.com
迷上了代码!