Use the same color multiple times in a plotting loop

2013 7 23
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Hello everyone,
I have a problem with a plotting loop, where I am plotting the spectral data and following the fit. For the reason of clarity I want to have them both in the same color, however matlab switches to the next color in order. Can anyone give me hint how to avoid this?
Ralf

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Narges M
Narges M 2013-7-23
How do you mean? you could introduce a color variable and update it only after all the plots of each iteration are done. Maybe if you put parts of your code here, it would be easier to understand.
Ralf Niemann
Ralf Niemann 2013-7-24
exactly that. I hope this makes my problem more clear:
folder=dir('*.csv');
for i=1:length(folder)
file=folder(i,1).name;
A=csvread(file);
plot(A(:,1),A(:,2));
hold all
f(:,1)=A(:,1);
f(:,2)=smooth(A(:,2),0.01,'lowess');
plot(f(:,1),f(:,2),'--');
end
Ralf Niemann
Ralf Niemann 2013-7-24
problem solved:
folder=dir('*.csv');
cc=lines(length(folder));
for i=1:length(folder)
file=folder(i,1).name;
A=csvread(file);
plot(A(:,1),A(:,2),'Color',cc(i,:));
hold all
f(:,1)=A(:,1);
f(:,2)=smooth(A(:,2),0.01,'lowess');
plot(f(:,1),f(:,2),'Color',cc(i,:),'--');
end

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Narges M
Narges M 2013-7-24
编辑：Narges M 2013-7-24

0 个投票

You could use a colormap such as HSV to generate a set of colors. For example:
folder=dir('*.csv');
N = length(folder);
col=hsv(N);
for i=1:N
file=folder(i,1).name;
A=csvread(file);
plot(A(:,1),A(:,2),'color',col(i,:));
hold all
f(:,1)=A(:,1);
f(:,2)=smooth(A(:,2),0.01,'lowess');
plot(f(:,1),f(:,2),'--','color',col(i,:));
end
You can read more in Matlab documentations: http://www.mathworks.com/help/techdoc/creating_plots/bqsxy_a-1.html

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