How do I pull data from a figure with multiple plots?

2015 2 13
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更新时间：2018 4 6
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I have a Matlab figure with 3 plots on it and I am trying to pull 'YData' from just one of the plots. I am trying to use the following:
h=findobj(gca,'Type');
y=get(h,'YData');
I do realize that this is only picking the YData from one plot but I do not know the plot naming structure or how to select between plots in one figure to pull data. How can I do this?

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per isakson
per isakson 2015-2-13
编辑：per isakson 2015-2-13

2 个投票

Looks strange too me. Do you use R2014b with the new graphic? If on the old graphic try
axh = findobj( gcf, 'Type', 'Axes' );
axh should be a three element vector
y1 = get( axh(1), 'YData' );
Try
get( axh(1) )
get( axh(2) )
get( axh(3) )
to find an appropriate property, the value of which can be used to distinguish between the axes. It might be different on R2014b.

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Kenneth Bohn
Kenneth Bohn 2015-2-17
编辑：Kenneth Bohn 2015-2-17
Thank you. While I could not get this to work using 'Axes', I did get it to work using 'Line' in it's place. I think you might have thought I was trying to pull the axes values, but I was really trying to pull the data from the plotted line. Either way this ended up working for me.
I should add that using the 'axes' with 'YData' and 'XData' gave me errors on my version. It gave the following:
y1 = get( axh(1), 'YData' ); Error using matlab.graphics.axis.Axes/get There is no YData property on the Axes class.
I am using R2014b.
per isakson
per isakson 2015-2-17
编辑：per isakson 2015-2-17
y1 = get( axh(1), 'YData' ); &nbsp is wrong! Now I cannot see why I included it in the first place. (Maybe, I edited your line without thinking.) My idea was to first spot the axes (diagram) of interest out of the three. Next find the children of that axes.

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jtnewgard
jtnewgard 2018-4-6
编辑：per isakson 2018-4-6

1 个投票

I had some trouble grabbing data from subplots using 'get'. Perhaps I was using the wrong indexing in choosing the subplot.
However, something like this:
g=load('soil_strength.fig','-mat');
depth=g.hgS_070000.children(1,1).children(1,1).properties.YData;
Dr=g.hgS_070000.children(1,1).children(1,1).properties.XData;
phi=g.hgS_070000.children(2,1).children(1,1).properties.XData;
depth_check=g.hgS_070000.children(2,1).children(1,1).properties.YData;
Lets you go through ALL the figure data.
Might take some perusing but you'll find what you need in there.

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