Suppress Warnings in MATLAB

MATLAB provides a facility to add Suppress Warnings. Using MATLAB’s warning function, you can disable warning messages. Here are a few techniques:

Suppress one warning

The warning (‘off’, ‘identifier’) command, where ‘identifier’ is the identifier of the warning message, can be used to suppress a particular warning message. For instance, you can use: to disable the singular matrix warning message.

warning(‘off’, ‘MATLAB:singularMatrix’)

Suppress all warnings

You can use the caution (‘off’, ‘all’) command to suppress all alert messages. For instance:

warning(‘off’, ‘all’)

With this, all MATLAB alerts will be disabled.

Reset the preset warnings

The warning (‘on’, ‘all’) command can be used to return the warning status to its default state. For instance:

warning(‘on’, ‘all’)

By doing this, you can return the warning status to its initial state, where all warnings are shown.

Suppressing warnings can be advantageous, but it can also hide potential issues in your code, it’s essential to remember this. Use it wisely, and after you’re done debugging your code, make sure to switch the warnings back on.

Example 1:

Matlab

clc;
% Create a matrix with a divide by zero warning
X = [4 5; 6 0];
% Suppress the warning and perform the division
warning('off','all')
warning
Y = 1 ./ X;
% Turn the warning back on and display the result
warning('on', 'MATLAB:divideByZero')
disp(Y)

Output:

This code generates a 2×2 matrix X with a divide-by-zero warning, then uses the warning function’s ‘off’ option to suppress the warning before carrying out the division operation. The outcome is displayed using the disp function, and the warning is turned back on using the warning function with the ‘on’ option.

Suppressing warnings can be helpful for clearing up the MATLAB terminal output’s disorder.