Anonymous Function Error Question
조회 수: 1 (최근 30일)
이전 댓글 표시
Hi All,
I am trying to write an anonymous function that will take the equation and then it will find the parameters for x(1) and x(2). It's telling me that my it can't do it because the size of the left side is 1-by-1 and the size of the right side is 41-by-1. The drug1Dose is a 41x1 structure. Attached is my code. Thank you for your help in advance!
f= @(X,c) c.^X(2)./(X(1)^X(2)+ c.^X(2));
c=drug1Dose;
fun=@(X)f(X,c);
x1=[2,5];
param1=fminsearch(fun,x1)
댓글 수: 1
Stephen23
2021년 3월 11일
"The drug1Dose is a 41x1 structure. Attached is my code."
So lets try it and see what happens:
drug1Dose = struct('whatever',num2cell(rand(41,1)))
f= @(X,c) c.^X(2)./(X(1)^X(2)+ c.^X(2));
c=drug1Dose;
fun=@(X)f(X,c);
x1=[2,5];
param1=fminsearch(fun,x1)
답변 (1개)
Star Strider
2021년 3월 10일
The problem you want to solve is not at all clear.
It would appear that you are doing curve-fitting (parameter estimation), with independent and dependnet variables. If so, ‘fun’ needs to be:
fun = @(x) norm(c - f(x,t));
assuming that you are estimating the pharmacokinetic parameters of your model sa a function of time.
In any event, ‘fun’ needs to return a scalar, not a vector, for fminsearch (or any other optimisation function) to work correctly.
댓글 수: 0
참고 항목
카테고리
Help Center 및 File Exchange에서 Nonlinear Optimization에 대해 자세히 알아보기
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!