MATLAB: How to classify a variable if it is a string or a number

classificationstring

I want to display if the costumer has introduced a number or a string when is requested.

Best Answer

Use the class() function.
str = 'Test';
num = 1;
strcmp(class(str),'char')
true
strcmp(class(num),'double')
true
Of course, if the entry was prompted with inputdlg, all responses will be returned as strings. In that case, you'll need to try and convert the string to a number and examine the result. If str2num or str2double can't convert a string, they return NaN.
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