How to save value in an array using python

Question

I want to save a value into an array using numpy. All is working fine but when I try to save the values in the array I am getting an error. Here is what I've done so far:

import numpy as np
batchSize = 2
numClasses = 2
maxSeqLength = 10 #Maximum length of sentence

labels = []
arr = np.zeros([batchSize, maxSeqLength])

for i in range(batchSize):
    num = randint(1,17)
    labels.append([1,0])
    # print(num)
    print(labels)
    print(ids[num-1:num])
    arr[i]=ids[num-1:num]

When I print ids matrix I am getting these values

[[1, 0]]
[[   nan 11501.   420.  5842.    nan  4245.    nan     0.     0.     0.
      0.     0.     0.     0.     0.     0.     0.     0.     0.     0.
      0.     0.     0.     0.     0.     0.     0.     0.     0.     0.]]
[[1, 0], [1, 0]]
[[   nan    nan  7624.  3936. 11501.  8064.  5842.    nan    nan  1087.
     37. 11516.    nan 10936.    nan 12111.     0.     0.     0.     0.
      0.     0.     0.     0.     0.     0.     0.     0.     0.     0.]]

and this is the error I am getting when saving the arr array

could not broadcast input array from shape (30) into shape (10)

You define numClasses but don't ever use it. You use maxSeqLength but it is never defined. — schaefferda
– schaefferda, Commented Oct 17, 2018 at 16:12
He might have defined but, did not show it here. If he did not define it how is he printing those? — pvy4917
– pvy4917, Commented Oct 17, 2018 at 16:15
The error is pretty clear, you're trying to insert a array of 30 elements into an array of 10 elements. It means arr[i] has maxSeqLength while ids[num-1:num] has a different length. — Rocky Li
– Rocky Li, Commented Oct 17, 2018 at 16:20

Rocky Li · Accepted Answer · 2018-10-17 16:23:22Z

2

The error is pretty clear, you're trying to insert a array of 30 elements into an array of 10 elements. It means arr[i] has maxSeqLength=10 while ids[num-1:num] has a different length=30

You can fix this by setting maxSeqLength=30 before you generate the np.zero matrix.

edited Oct 17, 2018 at 16:23

answered Oct 17, 2018 at 16:22

Rocky Li

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4 Comments

Tayyab Vohra Over a year ago

Should i exceed the max lenth to 30?

Tayyab Vohra Over a year ago

when i have set to maxlenth=30 i am getting 0 on every index of array

Tayyab Vohra Over a year ago

like this [0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0.]

Tayyab Vohra Over a year ago

values are not saving i guess

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