Basic Matlab to python question

Hi all,

I am a 'native Matlaber' attempting to run some things on python. I was wondering if you could help me with a seemingly simple question.

how would I convert the Matlab line

array([6:10,1:4])

into python?

I am aware this is not directly a Matlab question, but any help would be apreciated.

Thank you!

[Pavel]

What exactly do you mean?

Your code looks like a Python code to me, do you want this now as Matlab code?

If so I recommend this tutorial series:

https://www.mathworks.com/help/matlab/learn_matlab/matrices-and-arrays.html

[H]

Apolagies, I could be clearer, I mean the Matlab code where I select some of the end values to be at the beggining, and select some of the beggining values to go at the end in an array.

How would I do this is python?

Answer 1

[Al Danial]

The Python equivalent is much more verbose than matlab's [6:10,1:4]:

In : import numpy as np
In : np.hstack((np.arange(6,11), np.arange(1,5)))
Out: array([ 6,  7,  8,  9, 10,  1,  2,  3,  4])

NumPy's hstack() function does a horizontal concatenation of arrays. The other quirk is that one must specify arange(a, b+1) to get the equivalent of matlab's a:b.

[H]

Thank you!

Answer 2

[Askic V]

This is what you probably want:

import numpy as np

arr = np.array([1, 2, 3, 4, 5])
arr2 = np.arange(0,10,2)

print(arr)
print(arr2)
print(arr2[1:4])

This leads to the following output:

[1 2 3 4 5]
[0 2 4 6 8]
[2 4 6]

[H]

This is a good step but not quite what I am looking for.

My end goal is to get an array like-

[6 7 8 9 10 1 2 3 4 5]

(example for simplsty, im actually looking to rearange a bigger array, only selcting the last few and first few values e.g. [ 111 112 113 1 2 3]).

Thanks for the help though.