MATLAB: How to do plotting with different colors in same figure

colorMATLABplotting

My sample code is this:

 x=[1:100];
 for i=1:5
 y(:,i)=i*log(x);
 end

This plots 5 different curves of same color.

How to plot each curve with a different color ?

Hi!

If you plot like

plot(x,y)

and y is a matrix, you get plots with different color automatically. But you can do something like this to get manual coloring:

colorstring = 'kbgry';
figure(1); cla;
hold on
for i = 1:5
  plot(x,y(:, i), 'Color', colorstring(i))
end

Choose the colormap you want, and specify the number of levels you want.

For example:

cmap = colormap(parula(10));

then for the 7th plot, you might call plot as:

hold on
for k1 = 1:10
    plot([1:10], randi(k1*5, 1, 10), 'Color',cmap(k1,:))
end
hold off
grid

You can also set the 'AxisColorOrder' and 'AxisLineStyleOrder' by default or for each axis (this example taken from another post):

set(0,'defaultaxescolororder',[0 0 0; 0.5 0.5 0.5]) %black and gray
set(0,'defaultaxeslinestyleorder',{'-*',':','o'}) %or whatever you want

In R2014b and later, replace the ‘0’ with groot.

You can draw different lines.

t = 0:0.02:4*pi;
y = sin(t);
index = (y >= 0);
plot(t, y, 'b');
plot(t(index), y(index), 'r');