How do I assign colours to every plotted dot if I have the colours as cell arrays

I have an x-position matrix and a y-position matrix eg. x=[1,2,3,4] y=[1,2,3,4] nad I also have a cell array for the colours of each position eg, c = [r g b r]. How can I plot the data so that each dot on the plot corresponds to the colour, eg, positon 1,1 is red position 2,2 is green

Answer 1

[DGM]

Normally, you'd do this by using a colortable (or a list of indices into a color table) with scatter().

x = 1:4;
y = 1:4;
c = [1 0 0; 0 1 0; 0 0 1; 1 0 0];

scatter(x,y,40,c,'filled');

If you really want to do it using a cellchar of color names, I'm pretty sure you're going to be stuck using a loop.

x = 1:4;
y = 1:4;
c = {'r','g','b','r'};

for k = 1:numel(x)
    plot(x(k),y(k),'.','color',c{k},'markersize',20);
    hold on
end