MATLAB: I am using isosurface to plot 3d density maps. I would like to plot multiple maps in the same figure, each one with a different color. How to do so

Question

nBins=20;

D=cell(size(A,1),size(A,2));

for i=1:size(A,1)

for j=1:size(A,2)

if ~isempty(A{i,j})

x=A{i,j}(:,1); y=A{i,j}(:,2); z=A{i,j}(:,3);

xBins=linspace(min(x),max(x),nBins);

yBins=linspace(min(y),max(y),nBins);

zBins=linspace(min(z),max(z),nBins);

D{i,j}=zeros(nBins,nBins,nBins);

for ii=1:numel(x)

xi=find((x(ii)>xBins),1,'Last');

yi=find((y(ii)>yBins),1,'Last');

zi=find((z(ii)>zBins),1,'Last');

D{i,j}(xi,yi,zi)=D{i,j}(xi,yi,zi)+1;

end % for ii=1:numel(x)

D{i,j}=smooth3(D{i,j});

%isosurface(D{i,j})

%hold on

end % if ~isempty(A{i,j})

end % for j=1:size(A,2)

end % for i=1:size(A,1)

Answer 1

You can try this:

[x,y,z,v] = flow;
figure;
p = patch(isosurface(x,y,z,v,-3));
p.FaceColor = 'yellow';
hold on;
p = patch(isosurface(x*3,y*1,z*3,v,-3));
p.FaceColor = 'red';
p.EdgeColor = 'none';
p = patch(isosurface(x*1,y*3,z*3,v,-3));
p.FaceColor = 'green';
p.EdgeColor = 'none';
hold off;
%optional
camlight 
lighting gouraud

See isosurface documentation: https://www.mathworks.com/help/matlab/ref/isosurface.html