Using hold and plotyy in a loop

Question

Jonathan am 13 Aug. 2015

0
Verknüpfen

Direkter Link zu dieser Frage

https://de.mathworks.com/matlabcentral/answers/233790-using-hold-and-plotyy-in-a-loop

Kommentiert: Jonathan am 14 Aug. 2015

In MATLAB Online öffnen

I am having trouble getting matlab to update plotyy in a loop.

I want extend a line of data as my code advance in time.

This is easily done for a single plot, as shown below for a simplified extract of my code

for year=1:1:year_max
  %***Do Calcs
  CalcStuff(year)
    %***plot
    figure(1)
    subplot(3,1,[2 3]);  cla;  hold on;
     %some stuff
    subplot(311); hold on; 
    plot(year/1000,sum(State.Ice),'k.');
     xlabel('Time (kyrs BP)')
     ylabel ('Total Ice Mass')
    drawnow;
 end;

However, the similar code below for two lines using plotyy() is broken. The first Data point appears and STAYS on the plot (great), but all subsequent data are overwritten each loop (BAD!!).

for year=1:1:year_max
  %***Do Calcs
  CalcStuff(year)
    %***plot
    figure(1)
    subplot(3,1,[2 3]);  cla;  hold on;
     %some stuff
    subplot(311); hold on; 
     [ax,h1,h2]=plotyy(year/1000,sum(State.Ice),year/1000,CO2ppmv);
     set(h1, 'linestyle', '.','color','k'); set(ax(1), 'ycolor', 'k')
     set(h2, 'linestyle', '.','color','r'); set(ax(2), 'ycolor', 'r')
     hold(ax(1));hold(ax(2));
     xlabel('Time (kyrs BP)')
     ylabel ('Total Ice Mass')
    drawnow;
 end;