I have data saved from each loop run and it looks like this.
val =
(1,1) 16.0000
(9,1) 0.0017
(10,1) 0.0040
(11,1) 0.0049
(12,1) 0.0048
(13,1) 0.0043
The matrix is 50x50, however only the cells that contain the specific element are showed in this save.
I know that those are the values and their corresponding locations.
I want to know what this format is and how can I count the the number cells shown this way quickly.
This is a sparse matrix, as @Oli already said correctly. I will try to elaborate a little bit.
You create it with the following commands:
s = sparse(zeros(13,13));
s(1,1) = 16;
s(9,1) = 0.0017;
s(10,1) = 0.0040;
...
Convert it back to full matrix by using full command:
f = full(s);
And it you want to count the number of entries, use nnz. It counts the number of non zero entries:
z = nnz(s);