plot multiple lines with same sample size and apply colour string

p2 = 'filename.xlsx'

hold on
set(groot,'defaultLineLineWidth',1.5)

ex = xlsread(p2,'1','E2:E37');
ey = xlsread(p2,'1','C2:C361');

eplot = plot(ex,rescale(ey(1:36)),'r-.',ex,rescale(ey(37:72)),'color','#D95319',ex,ey(73:108),'color','#EDB120');
legend('1','2','3')

I can plot 2 lines but when I add the third, it says there is error using plot and error using matlab_graphs

When plotting, is there a way to specify plot ey in chunks of 36 and apply a rainbow colourstring to the lines plotted

Answer 1

[William Rose]

@Yuktha Andie Ravinthiran,

Yes it is possible. Use the "hold on" command and write a for loop. Inside the ploop, plot successive sets for 36 points.

See below.

N=432;
x=rand(1,N);  %create N data points
M=36;
P=floor(N/M);  %number of loop passes to make
colors=[1,0,0; 1,.5,0; 1,1,0; .5,1,0; ...
        0,1,0; 0,1,.5; 0,1,1; 0,.5,1;...
        0,0,1; .5,0,1; 1,0,1; 1,0,.5];  %colors to use
figure;
hold on
for i=1:P
    plot((i-1)*M+1:i*M,x((i-1)*M+1:i*M),'Color',colors(i,:));
end

Try it.

[William Rose]

@Yuktha Andie Ravinthiran,

I see now that you plotted your 36 point groups all versus the same x-axis values. To do this, change the "plot" line in the code above:

N=432;
x=rand(1,N);  %create N data points
M=36;
P=floor(N/M);  %number of loop passes to make
colors=[1,0,0; 1,.5,0; 1,1,0; .5,1,0; ...
    0,1,0; 0,1,.5; 0,1,1; 0,.5,1;...
    0,0,1; .5,0,1; 1,0,1; 1,0,.5];  %colors to use
figure;
hold on
for i=1:P
    plot(1:M,x((i-1)*M+1:i*M),'Color',colors(i,:));
    legstr{i}=sprintf('Run %d',i);
end
legend(legstr);

I added a legend line.

Good luck.