Read a matrix with symbolic variables

I am trying to obtain matrices with symbolic variables from .txt files. This is an example of a text file.

-1,x,0,x,0,0,0,x,0,x,0,x,0,x,0,x

0,x-1,0,0,0,0,0,x,0,0,0,x,0,0,0,x

0,0,x-1,0,0,0,0,0,x,0,0,x,0,0,0,x

0,0,0,x-1,0,0,0,x,0,0,0,0,0,x,0,x

0,0,0,0,x-1,0,0,x,0,0,0,0,0,0,x,x

0,0,0,0,0,x-1,0,0,x,0,0,0,0,x,0,x

0,0,0,0,0,0,x-1,0,x,0,0,0,0,0,x,x

0,x,0,0,x,0,0,x-1,0,0,0,x,0,0,x,x

0,0,x,0,0,0,x,0,x-1,0,0,x,0,0,x,x

0,0,0,0,0,0,0,0,0,x-1,0,x,0,x,0,x

0,0,0,0,0,0,0,0,0,0,x-1,x,0,0,x,x

0,0,0,0,0,0,0,0,0,0,0,x-1,0,0,0,x

0,0,x,0,0,0,0,0,x,0,x,0,x-1,0,x,x

0,0,0,0,0,x,0,0,x,x,0,x,0,x-1,0,x

0,0,0,0,0,0,x,0,x,0,x,x,0,0,x-1,x

0,0,x,0,0,0,x,0,x,0,x,0,x,0,x,x-1

When I try with readmatrix, the values with an 'x' get replaced with NaN

When I try with importdata, I get a cell where each value is a string containing a row of the matrix.

Another thing I tried is to copy the matrix in Matlab but when I do with bigger matrices (625x625 for example) Matlab starts lagging a lot.

I would appreciate if anyone has any ideas

Answer 1

[Voss]

filename = 'matrix.txt';

M = str2sym(split(readlines(filename),','))

M = 

[Louis]

This works great thanks!

[Voss]

You're welcome!