What is the corect code for writing an error message when a user inputs an array instead of a scalar value?

What is the corect code for writing an error message when a user inputs an array instead of a scalar value?

Answer 1

[James Tursa]

Several ways to test for a scalar. E.g.,

if( ~isscalar(x) )
    error('Input is not a scalar');
end

or

if( numel(x) ~= 1 )
    error('Input is not a scalar');
end

etc.