Subscripted assignment dimension mismatch.

Hello, I am attempting to separate a large matrix into two parts for kernel formation for clustering with a kernel k-means algorithm. While I would ordinarily jus reshape it into a third dimension, this option is impossible given that the number of columns in the matrix in question is odd (24021). I have been unable to perform any of the things that I have seen before, such as indexing. Below is the method I tried, which returned the above error message.

EDU>> for n=1:24041
if n<=12021
split{1}(n)=test(:,n);
elseif n>12021
split{2}(n-12021)=test(:,n)
end
end
Subscripted assignment dimension mismatch.

If anyone can tell me what is going on, I would greatly appreciate it. Thanks in advance.

Answer 1

[Walter Roberson]

split{1} = test(:,1:12021);
split{2} = test(:,12022:end);

[Jacob Moses]

This worked perfectly, and was easiest for me to understand. Thank you so much!

Answer 2

[José-Luis]

You are probably trying to assign a matrix to a scalar:

 split{1}(n)=test(:,n);

split{1}(n) is most likely a scalar

test(:,n) is probably a column vector

[Walter Roberson]

test(:,1) would have to be a row vector.

[José-Luis]

No, it is a column vector as far as I understand it.

[José-Luis]

Now I see what you meant. I need some coffee.