converting python script to matlab

I am new in Matlab and I am trying to move some part of a python code to my matlab script. I have a bit of problem finding the same functionaltiy of numpy library for matrices in matlab.

I was wondering what would be the equivalent of following lines of code in matlab:

gamma1 = 1. + np.sum(phi[:T-1,:], axis=1)
phi_cum = np.cumsum(phi[:0:-1,:], axis=0)[::-1,:]
gamma2 = alpha + np.sum(phi_cum, axis=1)
lV1 = np.vstack((lV1, 0.))
lV2 = psi(gamma2) - psi(gamma1 + gamma2)  
lV2 = np.cumsum(np.vstack((0., lV2)), axis=0) 

thanks

Answer 1

[Ameer Hamza]

Check the following function. They are equivalent to the function used in your code

sum(): https://www.mathworks.com/help/matlab/ref/sum.html

cumsum(): https://www.mathworks.com/help/matlab/ref/cumsum.html

vertcat(): https://www.mathworks.com/help/matlab/ref/vertcat.html

[Zahra Sheikhbahaee]

thanks for the answer. Disentangling the indices here is making me confused

np.cumsum(phi[:0:-1,:], axis=0)[::-1,:]

Any suggestion how it will become in matlab?

[Ameer Hamza]

This command is equivalent to

y = cumsum(phi(end:-1:2, :))
y = y(end:-1:1, :)