shift a plot in the vertical direction?

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Shani
Shani 2013-11-21
评论： Henry Ebili 2016-4-12
How can I shift a plot in the vertical direction?
  1 个评论
Image Analyst
Image Analyst 2013-11-23
Here is what Shani asked, so that it will still be here when she deletes this question:
How can I shift a plot in the vertical direction?

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回答（2 个）

Azzi Abdelmalek
Azzi Abdelmalek 2013-11-21
编辑：Azzi Abdelmalek 2013-11-21
k=2
plot(y+k)
%or
plot(x,y+k)
HJ
HJ 2013-11-21
It's not the most elegant solution, but you could use handles to simply slide all the coordinates in one direction. For example:
% Plot twenty random points
plot(100*rand(1,20),'o');
axis([0 20 0 100]);
% Get coordinates of all objects in plot (note that you
% won't need to do this if you keep track of the handle
% of each point as you plot it...
plotObjects = get(gca, 'Children');
% Shift all points in the Y directon
offset = 5;
set(plotObjects, 'YData', get(plotObjects, 'YData') + offset);
If you run that last set command multiple times, you should see your points gradually shifting up and out of view.
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HJ
HJ 2013-11-22
More than half of what I posted is comments. The code part is really quite short.
In any case, the "right" approach (if there is such a thing) depends on what you're trying to do. If you just want to plot an existing bunch of numbers with an offset, then yes, Azzi's approach will work just fine. If you want to shift things on an existing plot, then the handle graphics stuff is a good way to do it.

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