GUI text box - Replacing a word entered in the text box.

I have a textbox in my GUI right now and I want the students to input something of the for "10*x(n)" , but for the code to work it has to be "10*x(1)". Is there a way to replace the incoming x(n) with x(1) ?

Answer 1

[Matt Fig]

str = '10*x(n)'
str2 = strrep(str,'n','1')

[Zach]

so if I'm getting it from my text box would it be

str=get(handles.textbox,'string')

str2=strrep(str,'n','1')

[Matt Fig]

That's the idea!