How can I convert a function with multivariable input to a function with single vector input?
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Hi, I want to use fmincon, and fmincon can deal with only function with single vector input.
When my formula is as below, it works well.
fun = @(x) x(1)^2+x(2)^2;
fmincon(fun,[1,1])
However, if the function form has multiple input as below, it does not work.
Is there any way to convert the fun2 below to the function with single vector input as the example above?
fun2 = @(x,y) x^2+y^2;
fmincon(fun2,[1,1]) % this does not work
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Answers (1)
Star Strider
on 31 Mar 2022
Do essentially the same thing, creating it with another anonymous function around it —
fun2 = @(x,y) x^2+y^2;
fmincon(@(b)fun2(b(1),b(2)),[1,1]) % now it works!
.
2 Comments
Star Strider
on 31 Mar 2022
My pleasure!
I am not aware of any. The ‘shell’ anonymous function would have to be writen specifically for each funciton.
For example, if the function needed to have extra parameters passed to it:
fun2 = @(x,y,a,b) a*x^2+b*y^2;
a = 3;
b = 11;
fmincon(@(b)norm(fun2(b(1),b(2),a,b)),[1,1]) % now it works!
There could not possibly be a general rule that would apply to all functions.
.
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