readmatrix command not working

I am using Matlab R2021a on a linux server. I enter the exact example from matlab's documentation found here:

https://www.mathworks.com/help/matlab/ref/readmatrix.html

The example doesn't work.

>> type basic_matrix.txt

6,8,3,1

5,4,7,3

1,6,7,10

4,2,8,2

2,7,5,9

>> readmatrix('basic_matrix.txt')

Error using readmatrix (line 158)

Invalid default value for property 'VariableSelectors' in class 'matlab.io.xml.internal.parameter.SelectorProvider':

Not enough input arguments.

>> M= readmatrix('basic_matrix.xlsx')

Error using readmatrix (line 158)

Invalid default value for property 'VariableSelectors' in class 'matlab.io.xml.internal.parameter.SelectorProvider':

Not enough input arguments.

Answer 1

[Sulaymon Eshkabilov]

Presumable that is happenign due to your OS - Linux.

You can try:

M=readtable('basic_matrix.txt');
M = table2array(M);
% You can also try:
T = readtable('basic_matrix.xlsx','Range','A1:D5','UseExcel',true);  % Note the flag

How to assign the flag see doc.

[Brian]

readtable('basic_matrix.txt') does not work either. I get the identical error message.

Answer 2

[Jeremy Hughes]

This looks like an installation issue to me. Something is missing/broken causing initialization error in the internal code.

Does this happen with a fresh install?

[Brian]

I will try. Thanks.