Update multiple YData on plot without losing focus

Hi guys, I'm trying to write some code to periodically update a plot with multiple 'Ydata' sets without losing focus on the current window i'm working on (i.e. Word, Chrome etc...).

At the moment I perform the calculations on the data then update the plot with a for loop in the following manner:

for...

figure(h);
    plot(t_whole,'-k');
    hold on
    plot(fit.mode,'-b');
    plot(fit.mean,'-r');
    axis tight
    drawnow
    hold off
end

This works to update the plot but then steals the focus back to the figure each time the plot is updated (approx every 6-12s depending on the data set)

Ideally I would want to use

set(h,'YData',...);

which wouldn't steal focus, but i'm not sure how to do that for the 3 data sets I have (t_whole,fit.mode,fit.mean). Any suggestions?

Thanks, Allen

Answer 1

[Ced]

where do you get your data from? In general, what I would do is the following, if you want to plot your three sets of data into a single plot:

1. plot the first set of data and save the handles, e.g.

figure(h)
hold on
handle1 = plot(t_whole,'-k');
handle2 = plot(fit.mode,'-b');
handle3 = plot(fit.mean,'-r');

2. Then, you can change your sets (probably through your for loop) and update them individually using the handles, meaning something like

for ...
set(handle1,'YData',t_whole_new)
set(handle2,'YData',fit.mode)
set(handle3,'YData',fit.mean)
drawnow
end

Hope this helps

[Allen Kelly]

Perfect, worked a treat. Thanks!

Answer 2

[Robert Cumming]

you need to save the handles for each of your 3 plots

h1 = plot ( t_whole, '-k');
h2 = plot ( fit.mode,'-b');
h3 = plot ( fit.mean,'-r');

then when you update you do

set(h1.YData,....)
set(h2.YData,....)
set(h3.YData,....)

[Allen Kelly]

As above. Looks like you guys answered at pretty much the exact same time :)