WOit gives me error says un recognized variable GWO

clc;
clear;
global A trn vald ;
T=100;
N=30;
lb=0;%
ub=1;
runs=30;
threshold=2;
fitfun=@AccSz; %fitness function 0.99Err+0.01*Selection Ratio
%% Problem Definition
fn={'arrhythmia','primary-tumor','australian','base_Brain_T91','hepatitis','horse-colic',...
    'KrvskpEW','BreastEW','spambase','SportsArticles','WaveformEW',...
    'WineEW','Zoo','CongressEW','Exactly','Exactly2','HeartEW','IonosphereEW','Lymphography'...
    'M-of-n','PenglungEW','SonarEW','SpectEW','Vote'};
SD=size(fn,1);
for j=1:SD
    libb=['BDD\' cell2mat(fn(j)) '.mat'];
 % A=load('C:\Users\d\Downloads\archieve');
   % save('featuresall.mat')
        load('f')
 A=featuresall;
    nVar=size(featuresall,2)-1;
    
    r=randperm(size(featuresall,1));
    trn=r(1:floor(length(r)*0.8));  % split 80% train 20% test not k-fold
    vald=r(floor(length(r)*0.8)+1:end);
    
    dim=nVar;
        
    for i=1:runs
        display(['At run ', num2str(i)]);
       [t_GWO(i),Nf_GWO(i),outcome_GWO(i), best_GWO(i,:),GWO_conv(i,:)]=GWO(N,T,lb,ub,dim,fitfun);
        [acc_GWO(i),sensi_GWO(i),speci_GWO(i)]=ACC(best_GWO(i,:));
 
end
str=(strcat(char(fn{j}),'_',num2str(1)));
    save(str)
end
v

[Jan]

@essrra: Please calm down. You have posted the question multiple time, attached it in the section for answers of another question and flagged it as spam. This wastes the time of your self and of the readers.

The error message is clear: Matlab does not find the function GWO. Do you expect this function to exist?

By the way:

str=(strcat(char(fn{j}),'_',num2str(1)));
% Simpler:
str = [fn{j}, '_1'];

[essrra]

NO IT DOESNT EXIST

[essrra]

HOW CAN i define it because i dont know

[essrra]

iam not expert in matlab

[Jan]

To learn how to create a function, Matlab's onramp tutorial is a good point to start.

Note, that your question would be much clearer, if you formulate it as "how do I create a function?"

[essrra]

I MAde ofunction but its said to mee too many input arguments

[Jan]

Post the code and a copy of the complete error message.

Please read this to increase your chances to get a useful answer: https://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer

[essrra]

function GWO

end

Error using GWO

Too many input arguments.

Error in MAIN (line 36)

[t_GWO(i),Nf_GWO(i),outcome_GWO(i), best_GWO(i,:),GWO_conv(i,:)]=GWO(N,T,lb,ub,dim,fitfun);

Answer 1

[Walter Roberson]

https://www.mathworks.com/matlabcentral/fileexchange/44974-grey-wolf-optimizer-gwo needs to be installed. You can use the Add-on Explorer to do that.