MATLAB: Using Solve Function for range returns error “Assignment has more non-singleton rhs dimensions than non-singleton subscripts”

Question

Hi there,

I'm trying to find a solution set over a range of X,Y,Z for a simple equation. I used nested for loops to run through the X,Y,Z and the solve function and on the second step through I get the error "Assignment has more non-singleton rhs dimensions than non-singleton subscripts" I've been reading through other posts and do not understand where this error is coming from.

This is my code snippet:

a = 100; 
b = 50;
X = 0:.1:10;
Y = 0:.1:10;
Z = 0:.1:10;
for i = 1:length(X)
    for j = 1:length(Y)
        for k = 1:length(Z)
              syms L
              PHI = X(i)/(1+L) + (Y(j)+Z(k))/((b/a)^2+L)==0;
              Lsol(i,j,k) = solve(PHI,L);
          end
      end
  end

and the full error is :

Error using subsasgn
Assignment has more non-singleton rhs dimensions than non-singleton subscripts
Error in sym/privsubsasgn (line 997)
                L_tilde2 = builtin('subsasgn',L_tilde,struct('type','()','subs',{varargin}),R_tilde);
Error in sym/subsasgn (line 834)
            C = privsubsasgn(L,R,inds{:});

I didn't know if anyone else has run into this problem before but it seems like there is something simple that I am missing here.

Thanks,

Anthony

Answer 1

A 0 solution for the first iteration results in the error.