multiple graph in one figure

Hello, I have data that are in results.txt, trying to achieve a graph similar to this one created on excel.

this is what I have done on matlab. I am not getting the result I need. on top of that I am sure there is an easier way to do that. it will be great if someone can help.

    textFileName = ['results.txt'];
    M = dlmread(textFileName);
    for runs = 1:40
    PS(runs)=M(runs,1);
    RS(runs)=M(runs,2);
   N(runs)=M(runs,3);
   PSK(runs)=M(runs,4);
   if PS(runs)==100
     plot(N,PSK,'k')
          grid on
    elseif PS(runs)==250  
    plot(N,PSK,'b')
         grid on
    elseif PS(runs)==500  
    plot(N,PSK,'g')
          grid on
      elseif PS(runs)==750  
     plot(N,PSK,'r')
          grid on
      elseif PS(runs)==1000  
     plot(N,PSK,'c')
          grid on
      elseif PS(runs)==2500  
    plot(N,PSK,'m')
         grid on
    end
    end

Thanks a lot.

[Stephen23]

Ayman El Hajjar's "Answer" moved here:

this is an extract of my data

100 8 10 33.33
100 8 25 57.14
100 8 50 52.09
100 8 100 50.52
250 13 10 27.26
250 13 100 52.85
250 13 200 52.45
250 13 250 50.43
500 18 10 0.00
500 18 25 46.15
500 18 500 49.49
750 22 10 16.67
750 22 25 54.55
750 22 500 50.97
750 22 750 49.91
1000 25 10 0.00
1000 25 25 55.61
1000 25 50 53.60
1000 25 750 49.66
1000 25 1000 54.01
2500 41 10 16.67
2500 41 25 48.48
2500 41 1000 49.54
2500 41 2500 49.17

Answer 1

[Jos (10584)]

Take a look at the function hold

Create some data
x = 1:10
y1 = 2*x+3
y2 = 3*x-4
plot(x,y1,'mo-') ;
hold on
plot(x,y2,'rs:') ;
hold off

[Jos (10584)]

or in one go:

plot(x,y1,'mo-',x,y2,'rs:')

[Ayman El Hajjar]

Thanks for your answer.

I am aware of both hold on, off and plot(x,y1,'mo-',x,y2,'rs:') however what I am looking for is different.

[Steven Lord]

How specifically is what you're looking for different than the behavior you receive with HOLD or plotting multiple lines in one PLOT call?

[Ayman El Hajjar]

I have tried this before, it is not what I am looking for. If you notice I did not say it is wrong, I said what I am looking for is different.

 textFileName = ['results.txt'];
 M = dlmread(textFileName);
for runs = 1:40
    %%Create a text file name, and read the file.
  PS(runs)=M(runs,1);
    RS(runs)=M(runs,2);
  N(runs)=M(runs,3);
  PSK(runs)=M(runs,4);
 if PS(runs)==100
    plot(N,PSK,'mo-') ;
          grid on
           hold on
 elseif PS(runs)==250  
    plot(N,PSK,'b')
    hold on
         grid on
   elseif PS(runs)==500  
    plot(N,PSK,'g')
    hold on
          grid on
      elseif PS(runs)==750  
     plot(N,PSK,'r')
     hold on
          grid on
      elseif PS(runs)==1000  
     plot(N,PSK,'rs:')
     hold on
          grid on
      elseif PS(runs)==2500  
     plot(N,PSK,'mo-') ;
     hold off
         grid on
 end

end

[Ayman El Hajjar]

obviously I am missing something , but I am not sure where.