How to take function as input from textbox?
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how can I take a function such as sin(x) or exp(x) as an input from the textbox in MATLAB gui?
t = get(handles.input,'string')
c = conv (t,t)
plot(c)
I have tried this but it does not work.
I want to convolve the signal but I can't figure out how to take input as a function
4 件のコメント
Mehmed Saad
2020 年 5 月 6 日
and do you have x or user have to enter it? is it necessary to use text box (you can use dropdown)?
回答 (1 件)
Mehmed Saad
2020 年 5 月 6 日
You can use any one of the following
- eval
- feval
- str2func
For example
The string user enters in text box is
s = 'sin(x)';
eval will evaluate the string assuming that x is variable inside your function workspace in which you are evaluation eval
eval(s)
For feval and str2func user must enter the function name and not the argument
s = 'sin'
feval(s,x)
or
s = 'sin';
f = str2func(s);
f(x)
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