CODEWITHSUNDEEP
python-2.7numpyappendconcatenation
R S John
R S John

Reputation: 515

How to append or concatenate 'n' numpy arrays?

I want to append 10 numpy arrays one after another. Is there any functions like

vm_all = np.concatenate(vm_1,vm_2,vm_3,vm_4,vm_5,vm_6,vm_7,vm_8,vm_9,vm_10)

or

cre_all = np.append(cre_1,cre_2,cre_3,cre_5,cre_6,cre_7,cre_8,cre_9,cre_10)

The problem with append() is that it takes at most 3 arguments. And concatenate() takes at most 2 arguments.

We can archive the target with for loop. But I would like to know whether any function available for this.

Upvotes: 1

Views: 1821

Answers (2)

Irshad Bhat
Irshad Bhat

Reputation: 8709

This will work for you:

vm_all = np.concatenate((vm_1,vm_2,vm_3,vm_4,vm_5,vm_6,vm_7,vm_8,vm_9,vm_10))

Upvotes: 2

cel
cel

Reputation: 31349

I think you are looking for hstack

import numpy as np
vm_all = np.hstack([vm_1,vm_2,vm_3,vm_4,vm_5,vm_6,vm_7,vm_8,vm_9,vm_10])

There is also vstack if you want to concatenate along the vertical axis.

Concatenate works as well, but you have to give a sequence of your arrays.

import numpy as np
vm_all = np.concatenate([vm_1,vm_2,vm_3,vm_4,vm_5,vm_6,vm_7,vm_8,vm_9,vm_10])

Upvotes: 2

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