Sparse matrix plot matlab

Question

I have a 5000 *5000 sparse matrix with 4 different values. I want to visualise the nonzero elements with 4 different colors such that I can recognise the ratio of this values an

Answer 1

Now i can answer the first part of the question. I suppose you need to do something like

sum(histc(A, unique(A)),2)

to count the number of unique values in the matrix.

temp = histc(A, unique(A)) "is a matrix of column histogram counts." So you get the counts of all values of unique(A) as they appear in A columns.

I'm doing stat = sum(temp,2) to get counts of all values of unique(A) in the whole matrix.

Then you can use the code proposed from @Dan to visualize the result.

hold all; 
u=unique(A);
for i = 1:length(stat) 
plot(u(i), stat(i)/max(stat), '*');
end

Please clarify what kind of relationship between the values do you mean?