Subscripted assignment dimension mismatch. what does it mean

clc;
clear;
close all;
k=3;
for i=1:k
    fi= input('\nEnter spatial frequency: f(i)=');
        f=0:0.01:1;
        fo=0:0.01:1;
        m=0:0.3:30;
        mo=0:0.3:30;
        fx=0.2;
        fy=0.2;
        rho=0.02;
        sd=zeros(length(f),length(fo));
        s=zeros(length(m),length(mo));
        find=1;
        foind=1;
        mind=1;
        moind=1;
for F=f
     for Fo=fo
         if ((F==fi)&&(Fo==fi))
                  sk(find,foind)=1;
              else
                  sk(find,foind)=0;
         end
             g(find,foind)=(1/(fx*fy*sqrt(1-rho^2)))*exp((-1/(2*(1-rho^2)))*((F^2/fx^2)-((2*rho*F*Fo)/(fx*fy))-(Fo^2/fy^2)))/(fx.*fy.*sqrt(1-rho.^2));
         sd(find,foind)=sd(find,foind)+conv(sk(find,foind),g(find,foind));      
foind=foind+1;
     end
     find=find+1;
     foind=1;
end
 for l=1:k
         s(mind,moind)=(1/k^2)*(s(mind,moind)+(sd(i/k,l/k)*exp(-j*2*pi*((i*m/k)-(l*mo/k)))));
         moind=moind+1;
         end
mind=mind+1;
moind=1;
   end
mesh(f,fo,s);
hold on;
xlabel('\bff');
ylabel('\bffo');
zlabel('\bfs(m,mo)');

Answer 1

[Walter Roberson]

Time for you to learn how to use the debugger. At the command line give the command

dbstop if error

and then run the program. When it stops with the error, examine the size() of each of the indices on the left hand side of the assignment statement, and the size() of the expression that you are trying to assign (that is, the size() of the right hand side of the assignment statement)

[karna]

hello, all the matrices sizes are ok.

[karna]

can u complile it and get exact output assign f(i)=0.2,0.5,0.75

[Walter Roberson]

So you are trying to store three values in one array location?

[karna]

k=3;

we has to assign f(i) any 3 values from 0 to 1.

once try to compile the code.

i'm getting the error for 11 line from last.

s(mind,moind)=(1/k^2)*(s(mind,moind)+(sd(i/k,l/k)*exp(-j*2*pi*((i*m/k)-(l*mo/k)))));

[Walter Roberson]

Numeric arrays cannot store multiple values in the same location. You will need to either use multiple locations (e.g., several columns for the same row) or else use cell arrays.