MATLAB Error - Local function name must be different from the script name.
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Hi, I am using the following code (saved as c_objective.m) for defining the objective function used with gamultiobj. I am getting an error:
"Error: File: c_objective.m Line: 3 Column: 14
Local function name must be different from the script name."
Please help me resolve this. Thank you.
% Define the multi-objective function for Pareto search
global intcon f Q nmsi M S I
function F = c_objective(x)
F(1) = -(f'*x+x'*Q*x);
tempx=[nmsi x];
for m=1:M
for s=1:S
for i=1:I
index=tempx(find(tempx(:,2)==m & tempx(:,3)==s & tempx(:,4)==i));
dvstorage(m,s,i)=tempx(index,5);
end
end
end
entropy_simple=0;
for i = 1 : I % for each SKU
K1=0;
for m= 1: M % For each Aisle
nim=sum(dvstorage(m,:,i)); % sum for every I, for every m SKU stock(all ones)
K1=K1+nim*log(nim+0.00001);
end
K1=-K1;
Ni=sum(sum(dvstorage(:,:,i)));
K2=Ni*log(Ni+0.0000001);
entropy_simple=entropy_simple+K1+K2;
end
F(2) = -entropy_simple;
end
采纳的回答
Bruno Luong
2024-9-22
编辑：Bruno Luong
2024-9-22
Perhaps swap those two fitst lines in your code file
function F = c_objective(x)
global intcon f Q nmsi M S I
...
Warning: using global variables is NOT recommended practice
4 个评论
Nilendra Singh
2024-9-22
Bruno Luong
2024-9-22
编辑：Bruno Luong
2024-9-22
When you use "global" statement you must do it in a local workpace, where you intend yo use it. When you use global BEFORE the function declaration as your original code , MATLAB interprets your mfile as a script with separate workspace and the the function is SUBSUNCTION. Then it complains since the name of the script (mfile) and a subfunction could not be the same.
Anyway you need to know a little bit about function/script/declaration in mfile to avoid having errors with such details.
Steven Lord
2024-9-22
I was not sure whether I can pass more than just the decision variable vector (x) to the objective function.
Yes, you can. This documentation page describes two approaches for doing so that don't involve global variables.
Nilendra Singh
2024-9-23
更多回答（1 个）
Venkat Siddarth Reddy
2024-9-22
编辑：Venkat Siddarth Reddy
2024-9-22
0 个投票
Hi Nilendra,
The error message indicates that the local function has same function name as the filename of a MATLAB script in which it is defined. This is not allowed in MATLAB, to fix the issue please rename either the function or the MATLAB script.
In this case please change the name from "c_objective" either for the local function or the MATLAB script.
I hope it helps!
3 个评论
Nilendra Singh
2024-9-22
Stephen23
2024-9-22
_"The script is a standalone function file with the same name c_objective.m. It is not defined in any other MATLAB file."_
No, you do not have a function file. By adding code outside of the function definition you created a script (and a local function):
"There is one possibility. My declaring the variables outside the function code, was making this function a local function, embedded in another script. Perhaps that's why declaring the global variables after the function name"
Yes. Any code outside of a function definition turns the file into a script.
Nilendra Singh
2024-9-23
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