MATLAB Answers

Plotting hitmap with different box size

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Hello,
I have a 64x9 matrix and I want to plot a heatmap with different box sizes. Figure as below.
Can someone please help me with this? Added sample data file

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Walter Roberson
Walter Roberson on 27 Jul 2018
Neither heatmap() or HeatMap() (from Bioinformatics toolbox) can do this for you.
You might want to look in the File Exchange to see if you can find some code to adapt.
Mudasser Seraj
Mudasser Seraj on 27 Jul 2018
Yeah. That's why I am asking help if someone can do this with codes. I couldn't find anything like this in File Exchange.
jonas
jonas on 27 Jul 2018
You can do this quite easily with scatter3. I'll give it a try.

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Accepted Answer

Kelly Kearney
Kelly Kearney on 27 Jul 2018
You can create this pretty easily using patches:
The test data:
c = rand(20,9)*2 - 1; % Color value
s = c; % Scale value
Plot
% Coordinates for a box
xbox = [-1 -1 1 1 -1]*0.5;
ybox = [-1 1 1 -1 -1]*0.5;
% Coordinates for the box centers
[yc,xc] = ndgrid(1:size(c,1), 1:size(c,2));
xc = xc + 0.5;
yc = yc + 0.5;
% Scale the box and add to center coordinates
x = xc(:) + xbox.*s(:);
y = yc(:) + ybox.*s(:);
% Plot
patch(x',y',c(:),'edgecolor', 'none');
axis tight equal;
set(gca, 'clim', [-1 1]);
colorbar;
Note that in this example I'm using the implicit expansion that was introduced recently (R2017 or so)... in older versions you'll have to use repmat, bsxfun, etc.

More Answers (1)

jonas
jonas on 27 Jul 2018
Edited: jonas on 27 Jul 2018
Here's an alternative using scatter3.
%%Some data
[X,Y]=meshgrid(1:10,1:10);
Z=rand(10,10).*2-1;
figure;hold on
%%Scale for color
zc=(Z+1).*100;
cn = ceil(max(zc(:)));
cm = colormap(parula(cn));
%%Scale Z for box size
zb=abs(Z(:).*850);
%%plot and fix visuals
h=scatter3(X(:), Y(:), Z(:), zb,cm(ceil(zc),:),'s','filled')
colorbar
caxis([-1 1])
set(h,'markeredgecolor','k')
set(gca,'xtick',1:10,'ytick',1:10)
box on
axis([0,11,0,11])
view(2)
grid on
See attachment