Control color in a for loop

Hello,

this is hopefully the last question I have for now.

The function "LPplotfun" will plot the matrices LPmatx/LPmaty row for row against each other. I want each plotted line to have a different color, so that they're distinguishable. However, I don't want it to be random. Instead, the first function is supposed to be red, second blue, third green, etc. If no colors are left it is supposed to roll over to red again.

The reason is that the function "LPerrorbarfun" (if it is activated) will plot the errorbars for the data points of each plot iteration. In that case, the errorbars and respective graphs should have the same color. So I have to somehow controll which color the "LPplotfun" and "LPerrorbarfun" grab use at each iteration of the for-loop.

I tried experimenting with the "colororder"-command, but couldn't figure out how it works/how I could implement it.

Is there a way to achieve this?

Thank you.

Below is the code for both functions

%% The plotting function

function LPplotfun(LPmatx,LPmaty,LPFits,LPNumRows,LPErrorbar_Flag) %LPplotfun plots all LPfit set up by LPfitfun
hold on
for k=1:1:LPNumRows
    hold on
    axis([-500 500 -500 500])
    plot(LPFits{1,k},'')  
    hold on
    if LPErrorbar_Flag == 0
        plot(LPmatx(k,:),LPmaty(k,:),'o')
        hold on 
    else
        hold on
    end% LPfits=LPfitfun(LPmatx,LPmaty,LPNumRows) %"LPfits" is the name of the cell in which all LPfits are stored.
    pause(0.75)
    hold on
end
end

%% The errorbar function

function LPerrorbars(LPmatx,LPmaty,LPmaterrorx,LPmaterrory,LPNumRows)
 %LPerrorbars plots all errorbars for the different data points
hold on
for k=1:1:LPNumRows
    hold on
    errorbar(LPmatx(k,:),LPmaty(k,:),LPmaterrory(k,:),LPmaterrory(k,:),LPmaterrorx(k,:),LPmaterrorx(k,:),'o')
end
hold on
end

[Ameer Hamza]

Why not just use the 'color' property of the line object. For example, in the function LPplotfun, before the for loop define

colors = [1 0 0;    % red
          0 0 1;    % blue
          0 1 0;];  % green      

and change the plot() function call like this

plot(LPmatx(k,:),LPmaty(k,:), 'o', 'Color', colors(rem(k-1,3)+1,:)) 

rem() will cause the colors to loop back.

Similar solution can be used for errorbar.

[Claudius Simon Appel]

Thank you, your solution has solved that problem.

[Ameer Hamza]

Glad to be of help. I have moved my comment to answer, since it solved the issue.

Answer 1

[Ameer Hamza]

[Comment moved to Answer as OP comfirmed that it resolved the issue]

Why not just use the 'color' property of the line object. For example, in the function LPplotfun, before the for loop define

colors = [1 0 0;    % red
          0 0 1;    % blue
          0 1 0;];  % green      

and change the plot() function call like this

      plot(LPmatx(k,:),LPmaty(k,:), 'o', 'Color', colors(rem(k-1,3)+1,:)) 

rem() will cause the colors to loop back.

Similar solution can be used for errorbar.