MATLAB: How to plot a histogram in 2D if one has the counts already

MATLAB

I collected some 2D histcounts with
histcounts2
now that I have the counts, how do I plot them? I know one can just feed the actual data X to hist3 but unfortunately that is not an feasible option because I suspect it would make matlab crash. I essential pre-compute the histogram counts for my data first because its more memory efficient (or at least doesn't crash matlab).
For a snippet of my code:
Xedges = linspace(lb,ub,nbins);
Y_edges = linspace(lb,ub,nbins);
W_hist_counts_all = zeros( size(nbins,nbins) );
index = 1;
for file_struct = data_filenames'
    if ~( strcmp(file_struct.name,'.') || strcmp(file_struct.name,'..') || strcmp(file_struct.name,'.DS_Store') )
        load( [path file_struct.name] );
        w1 = W_history(:,1);
        w2 = W_history(:,2);
        current_W_hist_counts = histcounts2(w1,w2,Xedges,Yedges);
        W_hist_counts_all = W_hist_counts_all + current_W_hist_counts;
then I just wish to plot:
W_hist_counts_all
any ideas how?

Best Answer

If you're using release R2016b or later, you can "Create a histogram from precomputed bin counts". The specific signature you want is histogram2('XBinEdges',Xedges,'YBinEdges',Yedges,'BinCounts',counts)
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