How to change color in a plot?

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Nimrod Daniel
Nimrod Daniel 2015-6-2
回答： Brendan Hamm 2015-6-2
Hello,
I have a plot with 4 different colors, and I want to change the green (light green) to deep green, so it would be like: plot(x,y,'color',[0 0.7 0])
In the main file I have:
if m == 1 color='.blue'; else if m == 2 color='.red'; else if m == 3 color='.black'; else if m == 4 color='.green'; end; end; end; end;
And in another function I have (the other function gets color, of course) : plot(xloc_est,yloc_est,color); % plot the filtered data
My simple question is what should I change in order to change the light green to [0 0.7 0] ?

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回答（1 个）

Brendan Hamm
Brendan Hamm 2015-6-2
One thing you could do is just change the ColorOrder property of the axes itself:
f = figure;
colors = [0 0 0.7; 0.7 0 0; 0 0 0; 0 0.7 0 0]; % b,r,k,g
a = axes('ColorOrder',colors)
% plot your lines and they will be plotted with these colors in order.
plot(x,y);
hold on
plot(x2,y,2);
Then plot your other lines ...
Your other option is to change with a single plot the way you showed:
plot(x,y,'Color',[0 0.7 0]);
which could be accomplished in your loop:
if m == 1
color = 'b';
elseif m == 2
color = 'r';
elseif m == 3
color == 'k'
elseif m == 4
color == [0 0.7 0];
end
plot(x,y,'Color',color);
Avoid using nested if statements as they are not needed. The elseif is a single keyword.

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