How do I plot a third variable as line color???

Hello all--

I'm looking to plot many curves (given by cells X and Y), and I'd like to specify the color of each curve by a third variable (array Z) and display a colorbar for Z.

Currently this is my code:

for i=1:length(X)
    plot(X{i}, Y{i}, 'color', [1 0 Z(i)/max(Z)])
end

This allows me to plot each line as varying shades based on Z, but I have no clue how to make a colorbar.

Any help would be much appreciated!

Thanks, Jason

Answer 1

[Tim]

I think this should work for you:

 Z=1:1:100;
%Colormap is defined as a 3 column matrix, each row being an RGB triplet
map = zeros(numel(Z),3);
map(:,1)=1;
map(:,2)=0;
map(:,3)=Z./max(Z);
%Set the current Colormap
colormap(map);
%Display Colorbar
colorbar

[Jason Manley]

That's perfect! Thank you!

[Eko]

Would you please share the final script?