check String for letters ?

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

[Max Müller]

see ya tomorrow

Answer 1

[per isakson]

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