In an assignment A(I) = B, the number of elements in B and I must be the same error

Hi, I would like to know how to change the 0's in C that are in the same position where d1 finds values where (d<=d0) with the corresponding d value. d is a 100x1 array and d0 is the mean value. For instance if the first and fourth elements in d are less than d0, then the first and fourth elements in d are stored as the first and fourth elements in C respectively.

    C=zeros(100,1);
    d1=find(d<=d0);
    C(d1)=d;

Answer 1

[Image Analyst]

Almost right. Try this instead:

C=zeros(100,1);
d1 = find(d<=d0);
C(d1)=d(d1);

[ajk1]

Thanks, that worked!

Answer 2

[Star Strider]

Using ‘logical indexing’ works well here:

C = zeros(100,1);
d = randi(10, 100, 1);
d0 = mean(d);
C(d<=d0) = d(d<=d0);

[ajk1]

Thanks for your response.