Plotting subplot in real time Problem

Question

Lok Yiu To 2017-5-5

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/338839-plotting-subplot-in-real-time-problem

评论： OMARI TAHAR 2020-5-27

I am interfacing Arduino with MATLAB through serial plot. I have an accelerometer that input three values each time into the serial plot. I am trying to plot the 3 channel data into 3 separate subplot in real time. For some reason, only my last subplot will continuous scroll and the first two will stay at one scroll window.

if(scrollWidth > 0)
          set(plotgraph1,'XData',time(time > time(count)-scrollWidth),...
              'YData',datax(time > time(count)-scrollWidth));
          xlim([time(count)-scrollWidth time(count)]);
          set(plotGraph2,'XData',time(time > time(count)-scrollWidth),...
              'YData',datay(time > time(count)-scrollWidth));
          xlim([time(count)-scrollWidth time(count)]);
          set(plotGraph3,'XData',time(time > time(count)-scrollWidth),...
              'YData',dataz(time > time(count)-scrollWidth));
          xlim([time(count)-scrollWidth time(count)]); 
end

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Answer 1

Jan 2017-5-5

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/338839-plotting-subplot-in-real-time-problem#answer_265747

在 MATLAB Online 中打开

xlim([time(count)-scrollWidth time(count)])

This updates the X-limits of the current axes. If you only set the XData of an existing line object (created by a plot command), the current axes does not change. Therefore define the affected axes explicitely:

xlimit = [time(count)-scrollWidth, time(count)];
set(axes1, 'xlim', xlimit);

and the same for the other two axes also - assuming that axes1 is defined accordingly. You can set all three axes with one command also:

set([axes1, axes2, axes3], 'xlim', xlimit);

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Jan 2017-5-8

在 MATLAB Online 中打开

No, this will not work. But you can create two line objects in the same axes:

AxesH = axes('NextPlot', 'add');
plot1graph = plot(AxesH, ?, ?);
plot2graph = plot(AxesH, ?, ?);

And later:

set(plotgraph1,'XData',time(time > time(count)-scrollWidth),...
          'YData',datax(time > time(count)-scrollWidth));
set(plotgraph2, 'XData',time(time > time(count)-scrollWidth),...
          'YData',datay(time > time(count)-scrollWidth));