How can I classify a variable if it is a string or a number?

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Toni 2014-5-13

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评论： Benjamin Avants 2014-5-13

采纳的回答： Benjamin Avants

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

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Benjamin Avants 2014-5-13

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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.