Cannot plot a point in the color black

Hi,

I am using a for loop to store 1x3 vectors, each in a cell of a cell array. Each vector defines a color which is used to plot a datapoint. I am using that for loop because I need to plot different points in different colors, depending on the value of the data. I have no difficulty plotting points in non-black colors (ex: [1 0 0] for red), but when my cell array entry is supposed to be [ 0 0 0], it becomes [ ] . This causes an error when I try to plot the datapoint corresponding to that vector:

plot(x(i),datapt(i),'Color',colorcellarray{i})

Error using plot

Color value must be a 3 element vector

The same error occurs when I try to use 'k' in that cell array entry.

Does anyone have any ideas how to work around this problem? Thank you!

Answer 1

[Star Strider]

One line of code does not tell everything about what you are doing. I have no problem plotting in any of these colours.

Try this:

x = 0:9;
datapt = randn(size(x));
colorcellarray = {'k','c','m','y','k','r','g','b',[0.8 0.5 0.2],[0.1 0.35 0.65]};

figure
hold on
for i = 1:numel(x)
    plot(x(i),datapt(i),'p','Color',colorcellarray{i},'MarkerSize',10,'MarkerFaceColor',colorcellarray{i})
end
hold off
grid

.