How do I have different colours for each plot even having a different option in the popupmenu

I have created a GUI to plot data for 2 sensors using popupmenu to choose which sensor to plot in a single axes. Each sensor have 2 column of data, so total of 4 columns' data. I want to plot such that each column's data have different colours. Sensor 1 will have 2 column of data where one should be in red and yellow while in sensor 2 will have 2 column's data where the colours are blue and black

Answer 1

[KSSV]

x = (1:10)' ; 
A = rand(10,3) ; 
figure
plot(x,A(:,1),'r',x,A(:,2),'b',x,A(:,3),'g')

figure
plot(x,A)

figure
hold on
plot(x,A(:,1),'r')
plot(x,A(:,2),'b')
plot(x,A(:,3),'g')

[Chen Liang Teoh]

I mean that after i chose sensor 2 the colours are still the same as sensor 1. I want it to be different. How do I do that?

[KSSV]

Check the plot command and change the colors in there.