check if a variable exists in matlab

To check if a variable with a specific name already exists in MATLAB, you can use the exist function. This function returns a scalar value indicating the type of the specified variable name.

For example, to check if a variable named myVariable exists in your workspace, you can use the following code:

main.m
if exist('myVariable', 'var')
    disp('myVariable exists')
else
    disp('myVariable does not exist')
end
107 chars
6 lines

If myVariable exists, this code will output myVariable exists. Otherwise, it will output myVariable does not exist.