for ii = 1:N;
for k=1:length(col);
plot(X(ii,:), col{k});
end
end
You're plotting the same data over again for each color combination since the inner loop iterates over the symbols for every row of X. So, the only thing visible in the end will be the last symbol; it'll overplot each time on the same location so it'll probably end up looking like a blob since hold in on the previous won't be erased.
I'm guessing you intend and there are the same number of symbol combinations as there are rows in X, so
col={'ro', 'r*', 'rd', 'bo', 'b*', 'bd', 'ko', 'k*', 'kd'};
figure;
for ii = 1:N;
plot(X(ii,:), col{ii})
if ii==1, hold on, end % only need to tell it once... :)
end
should work.
I'll note if you orient the data by column, then plot will interpret each column as a variable and you won't need to loop at all. See the doc's for plot and examples for the gory details.
