Enter a string instead of a number in edit text, warning message matlab gui

i created a gui with edit text and a pushbutton. if you enter a string instead of a number in an edit text, i want a warning message, 'You've entered a letter. Please enter a number!'

i know the warning message code; warndlg('You've entered a letter. Please enter a number!','Warning','modal');

but i dont know string/number contradiction. it can be done with if loop i believe. but how? please help.

Answer 1

[Star Strider]

I would use the isletter function.

[Star Strider]

My pleasure!

(If it solved your problem, please Accept my Answer.)

Answer 2

[Yasin B.]

This is exactly what i'm looking for.. Thank you!