check String for letters ?

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Max Müller
Max Müller am 27 Sep. 2014
Bearbeitet: per isakson am 27 Sep. 2014
Hey Guys, I have an Editbox and I want to start my program only if the Editbox Input are only numbers. Unfortunately, get(handle.editbox,'String') gives the Input back as String. So how can i check whether the user only entered numbers ?
isnumeric wont work i guess

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per isakson
per isakson am 27 Sep. 2014
Bearbeitet: per isakson am 27 Sep. 2014
One way
is_num = not( isnan( str2double( str ) ) );
or
is_num = not( isnan( str2double( get(handle.editbox,'String') ) ) );
&nbsp
Won't work if user inputs "nan" :-(
>> isnumeric( nan )
ans =
1

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