color coding data points

I have a large matrix (Let's say 100*100). I want to plot the data and color each data point with certain color depending on its value

Please suggest a method to do this

[Mathieu NOE]

hello

see below and attachement

x = linspace(0,40*pi,400);
y = 16+16*sin(x);
h = plot(x,y); % capture the line handle when you plot it
caxis([1 32]);
cd = colormap(jet(32)); % take your pick (doc colormap)
cd = interp1(linspace(min(y),max(y),length(cd)),cd,y); % map color to y values
cd = uint8(cd'*255); % need a 4xN uint8 array
cd(4,:) = 255; % last column is transparency
cbv=colorbar('v');
set(cbv,'YTick',[1:32],'TickLabels',cellstr(num2str((1:32)')))
drawnow
set(h.Edge,'ColorBinding','interpolated','ColorData',cd)

Answer 1

[Adam Danz]

> I want to plot the data and color each data point with certain color depending on its value

That's what scatter or scatter3 is designed for. You can set the color of each point.

Alternatively, you could use imagesc(C) where C is your matrix or heatmap.

See the documentation and if you have any trouble implementing your figures based on the examples in the documentation, show us what you've got and describe where you're stuck.