MATLAB: GUI String to Function to evaluate

Question

Hello,

I am asking user to input a function with variable x using GUI. User inputs F= x^5+sin(x)*x+1 (example) and I would like to use this string as function input and evaluate x=[0 1 4 6 9 10] (example) but

% get(hObject,'String') returns contents of edit3 as text % str2double(get(hObject,'String')) returns contents of edit3 as a double.

This does not work. I was hoping str2func would work but no. I know that I can predefine x, and ask user to input F=x.^5 + sin(x).*x+ 1 but that is not the way I want to do it. I want inputting as natural as possible without user thinking about matrix power or size matching issue.

Is there a way to do it ?

Thanks.

Answer 1

Use vectorize on the string version of the edit field, and the str2func() the result.