How to Color Code Multiple 2D plots

I have a grid over an xy plot of an image. This image has z values for given x and y coordinates listed in a matrix. To the sides of the xy plot of the image I have an x vs z graph and a z vs y graph (so in total their are 3 graphs). I would like to color code lines from the grid to lines on the x vs z and z vs y graphs. For instance, say I had a blue horizontal line at y=100 on the grid on the xy plot of the image. I would then like to have a corresponding blue line for the x vs z plot, representing x vs z when y=100. Here is some of my code:

% To create grid

axes(handles.imageplot);

hold all

for k=X/(m+1):X/(m+1):X-(X/(m+1)) x=[1,Y]; y=[k,k]; plot(x,y);

end

for k=Y/(n+1):Y/(n+1):Y-(Y/(n+1)); x=[k,k]; y=[1,X]; plot(x,y);

end

hold off

% To create x vs z and y vs z plots

axes(handles.xzplot);

cla(handles.xzplot);

Xpixels=(size((Img1),1)) Ypixels=(size((Img1),2))

hold all for k=(Ypixels/(m+1)):(Ypixels/(m+1)):(Ypixels-(Ypixels/(m+1))) x=linspace(0,X,512) z=Img1(:,round(k)) plot(x,z)

end

hold off

axes(handles.zyplot);

cla(handles.zyplot);

hold all for k=(Xpixels/(n+1)):(Xpixels/(n+1)):(Xpixels-(Xpixels/(n+1))) y=linspace(0,Y,512) z=Img1(round(k),:) plot(z,y) end hold off

Using the hold all command makes different colors, but the colors don't always correspond to the appropriate places. Thank you for any help.

Answer 1

[Azzi Abdelmalek]

You can use

c=[0 0 0;0 0 1;0 1 0; 0 1 1;1  0 0;1 0 1;1 1 0;1 1 1]

plot(x,y,'color',c(1,:))
plot(x1,y1,'color',c(2,:))
%and so on

[Paul]

x1 and y1 aren't recognized as variables. I'm not sure how to make the color change for each iteration of the for loop or if I need to somehow restructure.

[Azzi Abdelmalek]

c=[0 0 0;0 0 1;0 1 0; 0 1 1;1  0 0;1 0 1;1 1 0;1 1 1]
for k=1:8
  plot(x,y,'color',c(k,:))
end