How to convert .mat file into .txt file containing a matrix of 1088 rows and 832 columns?

Question

I'd like some help with my Matlab problem. I'm working on macOS with Matlab R2016b. I want to convert a .mat file containing a matrix of 1088 rows and 832 columns into a .txt file.

I tried the above code without success.

load('H.mat')
dlmwrite('H.txt')

By loading the matrix on matlab I find the following informations :

Thank you.

Answer 1

dlmwrite is not recommended by matlab: Better use

load('H.mat')
writematrix(H, 'H.txt') 

see writematrix documentation.