Squared heatmap with random transition; animation
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Hi, I need to plot a40x40 squared heatmap animation, Something like the attached figure but a dynamic one where the color keep changing "randomly".
FYI, I have a system with 5 states 0, 1, 2, 3, and 4. Its a conditional system (Markov Chain) which can transit from one state to another. I need to present this concept in a visibly attractive way. That is why I want to plot this animation. Looking for suggestions and help. Thanks
采纳的回答
You could also use scatter with a superlarge markersize.
figure;
colormap([1 1 1;1 1 0;1 0 0;0 0 1;0 1 0]);
[X,Y] = meshgrid(1:40,1:40);
h = scatter(X(:),Y(:),50,randi([1 4],numel(X),1),'s','filled','markeredgecolor',[.5 .5 .5])
ax = gca;
set(ax,'visible','off')
ax.Position = ax.Position ./ [1 0.6 1.2 1.2];
axis equal
for j = 1:100;
h.CData = randi([1 5],numel(X),1);
pause(0.1)
end
12 个评论
Bidyut Bikash Goswami
2018-10-22
Thank you. Almost what I wanted. But I am getting lot of colors in my plot (as seen in the
figure below. How do I restrict it to only 5 colors? Also, can you please suggest, how do I add smooth transitioning (I am changing the "pause" value but that is not what I am looking for ... the transition needs to me smooth so that the viewer can appreciate the transition). Thank you in advance.
Bidyut Bikash Goswami
2018-10-22
jonas
2018-10-22
What do you mean smooth transition? Over time or space?
Bidyut Bikash Goswami
2018-10-22
jonas
2018-10-22
That is a bit more complicated but Ill give it a try.
Bidyut Bikash Goswami
2018-10-22
Try this, and see my comments below.
figure;
cmap = nan(400,3);
cmap(1,:) = [1 0 0];
cmap(100,:) = [1 1 0];
cmap(200,:) = [0 1 0];
cmap(300,:) = [0 0 1];
cmap(400,:) = [1 1 1];
cmap=fillmissing(cmap,'linear');
colormap(cmap);
[X,Y] = meshgrid(1:40,1:40);
h = scatter(X(:),Y(:),50,randi([1 4],numel(X),1),'s','filled','markeredgecolor',[.5 .5 .5]);
ax = gca;
set(ax,'visible','off');
ax.Position = ax.Position ./ [1 0.6 1.2 1.2];
axis equal
ax.CLim = [1 5];
n = 30;
C = nan(numel(X),n);
for j = 1:2
C(:,1) = h.CData;
C(:,end) = randi([1 5],numel(X),1);
C = fillmissing(C','linear')';
for jj = 1:n
h.CData = C(:,jj);
drawnow
pause(0.1)
end
pause(5)
C = nan(numel(X),n);
end
The difficult part is building the colormap so that the transition between colors are smooth.
The colorbar currently looks like this:
The colors are interpolated linearly between each set of random colors. This means that a square going from blue to white will appear blue-> light blue -> white, whereas a color going from red to white will transition through the entire spectrum. I don't know a different way to approach this though.
Bidyut Bikash Goswami
2018-10-23
My pleasure! You dont really need fillmissing but its a very good function. interp1 would work equally well, or you could use this FEX function
For gifs I have used this FEX function
Also, please don't forget to accept the answer. I feel we are drifting away from the original scope of the question, and its better to post a new thread if you have additional questions. Answering new questions in the comment section is not optimal as the answers are less visible to others facing similar issues.
Bidyut Bikash Goswami
2018-10-23
jonas
2018-10-23
Thanks! Always happy to help!
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