How to assign colors to each value in scatter function - GNU Octave

Question

How can I use the scatter function in GNU Octave in order to assign colors to each plotted value ?

Answer 1

Here's a nice illustrative example:

X = linspace(0, 4 * pi, 100);                       % Create points (100 elements)
Y = 100 * sin(X); 

S = Y + 100;                                        % Sizes array. All values need 
                                                    % to be larger than 0

C = [linspace(0,1,100); ones(1,100); ones(1,100)]'; % create hsv triplets at full 
                                                    % saturation and value that
                                                    % cover the whole colour 
                                                    % (i.e. hues) spectrum

C = hsv2rgb(C);                                     % convert to rgb triplets; to
                                                    % be used as a 'colour array'

scatter(X,Y,S,C,'filled','MarkerEdgeColor','k');    % fill bubbles, black border