string to calculation algorithm ?

4 views (last 30 days)
Max Müller
Max Müller on 16 Sep 2014
Commented: Max Müller on 16 Sep 2014
Hey Guys, Imagine u have a GUI which hold the variable x = 1:10 (doubble). Now I want to create an Editbox which allows the user to enter a calculation algorithm.
for example: x*3.
Is it possible to convert this string (x*3) into an actual calculation algorithm ?
  1 Comment
Stephen23
Stephen23 on 16 Sep 2014
The answers below give some solutions, including using eval and str2func , but keep in mind these could be dangerous as this allows the user to run arbitrary code, including system calls via MATLAB.

Sign in to comment.

Sign in to answer this question.

Accepted Answer

Michael Haderlein
Michael Haderlein on 16 Sep 2014
eval(string)

More Answers (1)

Adam
Adam on 16 Sep 2014
You can also create a function handle if you want, something like:
s = 'x*3';
s = ['@(x)' s];
f = str2func(s);
f(x);

Categories

Find more on Characters and Strings in Help Center and File Exchange

Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!