Making looping plots interactive with zoom and pan

Question

rmc256 2014-11-20

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https://ww2.mathworks.cn/matlabcentral/answers/163602-making-looping-plots-interactive-with-zoom-and-pan

编辑： Chad Greene 2014-11-20

I have a set of data (2D space, 1D time), which I normally make movies out of.

I'd like to create a GUI in Matlab in which I can loop over the data in time, like a movie, but allow the user to interactively use the plotting tools (zoom, pan specifically) while the loop is still going. Perhaps also have a "pause" and "rewind/forward" slider bar.

It seems like someone would have already done this, but I'm not finding that functionality on the FEX.

If not, it seems like I can do this with capturing zoom and pan events, and a while loop doing the plotting. Does this seem feasible?

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Answer 1

Chad Greene 2014-11-20

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https://ww2.mathworks.cn/matlabcentral/answers/163602-making-looping-plots-interactive-with-zoom-and-pan#answer_159665

编辑：Chad Greene 2014-11-20

在 MATLAB Online 中打开

Check out how Carlos Adrian Vargas Aguilera does it with ginput2.

There's a lot to decipher there, so perhaps you could do something like

if waitforbuttonpress % waitforbuttonpress is 1 if user hits any keyboard key
    char = get(gcf, 'CurrentCharacter');  % char is the character number of pressed key
    if char == 122  % 122 is the character number of lowercase z
        lim = axis; % get current axis limits
        pti=get(axes_handle, 'CurrentPoint');  % get current cursor point
          % center axis limits on cursor point:
          axis([pti(1,1)+diff(lim(1:2))/2*[-1 1] pti(1,2)+diff(lim(3:4))/2*[-1 1]]); 
          zoom(2) % zoom in
    end
end