Real time counter plot

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Lola
Lola on 30 Sep 2022
Edited: dpb on 1 Oct 2022
Hi. I am using appdesigner to create a counter. I am trying to plot the values that will be stored in the variable app.Counter in real-time. If the value is increased or decreased the plot must display this with a marker and a line joining from the previous marker. By pressing the pushbutton the app.Counter value is incremented by 1 but I am not seeing anything plotted on the UIAxes. Please assist.
function ButtonPushed(app,event)
app.Counter=app.Counter+1;
app.EditField.Value=app.Counter;
plot(app.UIAxes,app.Counter)
end
  3 Comments
dpb
dpb on 1 Oct 2022
I figured something was up...for that look at animatedline and addpoints

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Answers (1)

Image Analyst
Image Analyst on 1 Oct 2022
Try making an array like
function ButtonPushed(app,event)
if a.Counter == 0
allCounts = 0;
else
app.Counter=app.Counter+1;
allCounts(end+1) = app.Counter
end
x = 0; % Vertical x's, OR:
x = 0 : app.Counter; % If you want each x in its own column.
app.EditField.Value=app.Counter;
plot(app.UIAxes,x, allCounts, 'kx-', 'LineWidth', 2, 'MarkerSize', 18);
end
  5 Comments
dpb
dpb on 1 Oct 2022
Edited: dpb on 1 Oct 2022
...
x = 0 : app.Counter; % If you want each x in its own column.
should be
x = 0 : app.Counter-1; % If you want x on plot to begin at 0
x = 1 : app.Counter; % If you want x on plot to begin at 1
to account for "off-by-one" error of 1-based arrays and beginning the count with zero instead of one...
This should be easy to verify is the issue with the debugger as @Image Analyst suggested, presuming you used the vector multiple-x option...
However, this would be much simpler with animatedline and addpoints as suggested earlier; no array needed although would need to create the handle to the animated line to begin with on startup/initialization.

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