matlab says the inline function will be removed in future release how should i execute a string function like '2*x.^2+5'
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1 个评论
Stephen23
2017-6-20
How about using anonymous functions, just like the documentation recommends?
采纳的回答
Star Strider
2017-6-20
Your function becomes:
fcn = @(x) 2*x.^2+5;
the call it as you would any other function:
y = fcn(x);
str = '2*x.^2+5';
fun = str2func(['@(x) ',str]);
y = fun(x);
This creates the anonymous function from the string, and returns a function handle.
6 个评论
omid
2017-6-21
Stephen23
2017-6-21
Star Strider
2017-6-21
@omid — My pleasure.
If you are using symbolic variables and functions, use the Symbolic Math Toolbox matlabFunction function.
Steven Lord
2017-6-21
Use the symvar function to identify the variable(s) and use the char vector it returns in defining the char vector you pass into str2func.
Alfonso Rodriguez
2021-6-29
Thanks for these comments. They are very useful for computational math.
更多回答（1 个）
Andrei Bobrov
2017-6-21
syms y
f = matlabFunction(2*y^2+3);
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