MATLAB: HELP!!! how to deal with x(i,j,k,l).y(j,k,l).d(j,k)

high dimensional matrix compute

my function contains some high dimonsional matrix:how to deal with x(i,j,k,l).*y(j,k,l).*d(j,k)?

and matlab warnings a argument must be numeric.

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I see. U cannot times variable(sign) matrix. But how to express large-scale nonlinear function in matlab?

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MATLAB: Mixed-integer Linear Programming with double sum constraints and 3D optimization variable

data = someFun2ImportData('data.csv');
len = length(data);
% Pairwise distance matrix
dist_matrix = squareform(pdist([data(:,2:3)],@lldistmile));
P = optimvar('P',[len,1],'Type','integer','LowerBound',0,'UpperBound',1);
W = optimvar('w', [len,len,len,] , 'Type', 'integer', 'LowerBound',0,'UpperBound',1);
beta = 150;
t = 5;
ndesign = optimproblem('Objective',sum(P)); % Create optimization problem
 e=ones(1,len);
 ndesign.Constraints.const1 = ( sum(reshape(W,[],len),1)==1  );
 ndesign.Constraints.const2 = ( squeeze(sum(W,2))<=P*e  );
 ndesign.Constraints.const3 = ( dist_matrix(:).'*reshape(W,[],len)<=beta*t   );
 
opts = optimoptions('intlinprog','Display','off','PlotFcn',@optimplotmilp);
[sol,fval,exitflag,output] = solve(ndesign,'options',opts);

MATLAB: Error:index must be a positive integer or logical.

You have created (somewhere) a variable f. f is a scalar, a vector or an array.

Where is the 1.99'th element of that array? When did you create that element? The fact is, you cannot stuff something into the 1.99'th place in memory. There is no such place. Yet you have tried to access that memory element.

Since this is clearly impossible, MATLAB returns an error. It told you that your index must be a positive integer, or a logical (boolean) vector. However x2 is apparently the floating point number 1.99. How it got to be that is by your own design, since it was created by your coding.

If you are constantly getting that error, then you need not to try to index variables with real numbers. Perhaps you think of f as a function. It is not. It is a variable, at least as you have created it.

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Related Solutions

MATLAB: Mixed-integer Linear Programming with double sum constraints and 3D optimization variable

MATLAB: Error:index must be a positive integer or logical.

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