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# Subscripted assignment dimension mismatch.

Asked by Jacob Moses on 12 Jan 2013

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.

## Products

Answer by Walter Roberson on 12 Jan 2013
split{1} = test(:,1:12021);
split{2} = test(:,12022:end);

## 1 Comment

Jacob Moses on 12 Jan 2013

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

Answer by José-Luis on 12 Jan 2013
Edited by José-Luis on 12 Jan 2013

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 on 12 Jan 2013

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

José-Luis on 12 Jan 2013

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

José-Luis on 12 Jan 2013

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