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

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

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Benjamin Avants
Benjamin Avants el 13 de Mayo de 2014
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.
  2 comentarios
Walter Roberson
Walter Roberson el 13 de Mayo de 2014
str2num() would convert 'pi' to a number...
Benjamin Avants
Benjamin Avants el 13 de Mayo de 2014
True... so you may want to check for specific cases like that if they are likely to happen. Thankfully, there aren't that many.

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