how to solve Subscripted assignment dimension mismatch.

i have this code for joint pmf yesturday it was working good but now i'm facing the error.

[num,text,raw] = xlsread('UFOPOLLUTANTS.xlsx');
x=num(:,10); 
y=num(:,18); 
X=x(1:1000);
Y=y(1:1000);
observ=x(1:1000);    %
 
imageY=0:23;
nY = length(imageY);
observX = x(1:1000);
imageX=0:23; %Min value is 0 Max value is 172
nXx = length(imageX);
for i = 1:nXx
cX = imageX(i);
cnt(i) = sum(observX == cX);
end
pmfX = cnt/sum(cnt);
bar(imageX,pmfX)
imageY=0:23;
nY = length(imageY);
image = 0:23;
nX = length(image);
for i = 1:nX            % # of occurrences for each value of image of X in the total observations of column X
    cXi = image(i);
    cntX(i) = sum(observX == cXi);
         a=find(X==cXi)  ;
         p= Y(a) ;
    for j = 1:nY
        cX = imageY(j);
        P_y(i,j) = sum(p == cX);
    end
      u=P_y(i,:);
     d=sum(u);
     if (d==0)
         d=1;
     end
     an(i,i)=(P_y(i,:).*pmfX(i))./d;
     g=xlswrite('F:\Faheem\Study\1ST MS\stochatic system\Assignment\assgn5\snapshot\anaylysis3\jointpmf1.xls',an);
     
end

Error

an(i,i)=(P_y(i,:).*pmfX(i))./d;
Subscripted assignment dimension mismatch

Answer 1

[madhan ravi]

an(i,:)

[john karli]

i also try this but it does't work for me

[madhan ravi]

an=cell(1,nx); % before loop
an{i}...... inside loop
celldisp(an)   % after loop
cell2mat(an)   % double array

[john karli]

Thank you this work for me sir

[john karli]

may you solve joint Entropy in matlab formula for joint entropy is attached

[madhan ravi]

Anytime :) , if my answer solved your question ("how to solve Subscripted assignment dimension mismatch".) make sure to accept the answer but not sure I can help with that let me try though.