Hi Toby,
yes, colormap is usually used in connection with graphics. But there is nothing wrong in using the values for your purpose:
% get the values of a colormap, e.g. jet
f = figure('visible', 'off');
cm = colormap('jet');
close(f);
% limits
cmin = -5;
cmax = 10;
% now interpolate e.g. at 7
val = 7;
if val<=cmin
index = 1;
elseif val>=cmax;
index = size(cm,1);
else
index = round(1 + (val-cmin) * (size(cm,1)-2)/(cmax-cmin));
end
% grab corresponding row:
rgb = cm(index,:);
Titus
