a Line to plot by using handles ?

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Max Müller
Max Müller 2014-8-18
编辑： John Kelly 2015-2-12
Hey Guys,
Monday Morning Question: I have got an array(1x40) holding new y-Data. Now I want to plot this data in an existing Plot. Of course i could use gca / get(...,'children') / x = get(children,'xdata') to replot, but is there anyway to add the new Data and replot by using the childrens handles ?
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Adam
Adam 2014-8-18
编辑：Adam 2014-8-18
I'm not quite sure I understand which children's handles you mean.
If you keep hold of your axes handles then you don't need to use children and refind them at all, just a
hold( hAxes, 'on' )
plot( hAxes,... )
will do to be able to add new data to an existing plot.
I often have my axes embedded in my main gui so obviously they are easy to retrieve the handles of, but where I spawn a new figure I tend to store its axes (or figure handle, whichever I think more useful) on the handles structure of my GUI for retrieval.

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Michael Haderlein
Michael Haderlein 2014-8-18
Of course i could use gca / get(...,'children') / x = get(children,'xdata') to replot, but is there anyway to add the new Data and replot by using the childrens handles ?
The get(...,'children') gives you the children's handles. If you haven't saved them when creating the plots, you'll need to get them this way. However, you can set the new y values by set(handle,'ydata',y).
No need to say that the dimensions must remain.
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Michael Haderlein
Michael Haderlein 2014-8-18
编辑：Michael Haderlein 2014-8-18
Sorry, what do you want to do? You want to add plots without using the plot() function? I have no idea what this should be good for, but if you really want to do that, you could copy an existing plot and modify it:
h=copyobj(get(gca,'children'),gca);
set(h,'ydata',rand(size(get(h,'ydata'))))
(in this example, of course, I only had one plot existing before - otherwise that setting would fail as get(h,'ydata') would return a cell)
Max Müller
Max Müller 2014-8-18
My 1st Program Plots my 9 subplots with an unknown amount Plotines. Now I am creating a Program to get all the yValue, calculate the mean and plot the mean as a new line into the old axes of the subplot.

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更多回答（2 个）

Max Müller
Max Müller 2014-8-18
Still dont get it. I want to add a new PlotLine without using the Plot command. So i guess i need to create a new handle in the children structure cause every children is already holding its y-Value.
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Max Müller
Max Müller 2014-8-18
编辑：John Kelly 2015-2-12
no. I cant cause my PlotingProgram is far too complicated.
Max Müller
Max Müller 2014-8-18
I need to replot the whole subplots....is it possible to replot a plot by using the plots handle ?

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Max Müller
Max Müller 2014-8-18
Got it. Using Plot and hold on works not perfect but....it works

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