plot pause

Question

vsee 2011-8-16

1
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https://ww2.mathworks.cn/matlabcentral/answers/13845-plot-pause

Hello

I am using the following code to iteratively pan along the x-axis in small steps and it works fine.

asig = csvread('tek0001CH1.csv',15,0);
%tim =sig(1:1000000,1);
aamp = asig(1:2000000,2);
ts = asig(2,1) - asig(1,1);
tim = [0:2000000 - 1]*ts;
time = tim';
plot(time, aamp);
%set(h,'Motion','horizontal','Enable','on');
axis([0 max(tim) -0.1 1.9]);
ax_handle = gca;
    xlimit_orig = get(ax_handle, 'Xlim');
    win_xlimit = [0 0.001];
    offset = 0.001;
%   %Iterativley change the xlimit for the axes to pan across the figure
      while win_xlimit(2) <= xlimit_orig(2)
          set(ax_handle, 'Xlim', win_xlimit);
          pause(0.05);
          win_xlimit = win_xlimit + offset;
      end

However, if I want to stop in the middle of panning (If I see something of interest in the plot), how do I do it? I tried using waitforbuttonpress fcn and that doesn't work very well. Any suggestions please.

Thanks

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Answer 1

Jan 2011-8-18

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在 MATLAB Online 中打开

You can use a toggle button:

buttonH = uicontrol('Sytle', 'ToggleButton', ...
             'Units',    'pixels', ...
             'Position', [5, 5, 60, 20], ...
             'String',   'Pan', ...
             'Value',    1);
while win_xlimit(2) <= xlimit_orig(2)
  set(ax_handle, 'Xlim', win_xlimit);
  pause(0.05);
  if get(buttonH, 'Value') == 1
    win_xlimit = win_xlimit + offset;
  end  
end

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Fangjun Jiang 2011-8-18

Yes, you can. But need to move the set(ax_handle,...) line into the if statement. like below.

while win_xlimit(2) <= xlimit_orig(2)

pause(0.05);

if get(buttonH, 'Value') == 1

win_xlimit = win_xlimit + offset;

set(ax_handle, 'Xlim', win_xlimit);

end

vsee 2011-8-18

Thanks again. That worked. Appreciate it.

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Answer 2

Fangjun Jiang 2011-8-16

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Nice work! I recommend you making a generic function which includes mostly the code in your while-loop. This generic function can take some arguments and pan any axes in a figure. When you want to stop, just press Ctrl+C to stop the execution of the function. When you want to continue, you just run the function again.

Layout a list of the input arguments,such as the figure handle, axes handle, how fast you want it move, the initial xlimit, etc. I think it can be done.

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vsee 2011-8-18

Even if I had a function, how do I dynamically change the variable's value that I read from the keyboard, so that when the value changes, the plot begins to pan again.

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