How do I get the Xdata and Ydata from a figure using MATLAB 2015b?

Recently upgraded to Matlab 2015b and the handle graphics seems to have changed from the older versions. How do I get the Xdata and Ydata from a figure?

Answer 1

[Star Strider]

It’s changed, but it’s still available:

figure(1)
plot(x, y)                  % Plot Your Favourite (x,y) Values
grid
savefig('TestFig.fig');
clearvars, clf, cla         % Be Certain All Are Cleared

openfig('TestFig.fig');
hp = findobj(gca,'Type', 'line');
xd = get(hp, 'XData');
yd = get(hp, 'YData');

[CB]

Thanks! I was using 'Axes' instead of 'line'. The help is much appreciated!

[Star Strider]

My pleasure!

A get call to gca used to work. I discovered the ‘new’ findobj requirement when I needed to get the data from .fig files uploaded here. I’m not sure that’s well-documented.

[Andreas]

Dummy question: how can you update XData and YData after e.g. cleaning up raw data?

set(??)

[Star Strider]

Not ‘dummy’ at all!

I would just re-plot them.

However you can always do something like this as well:

set(hp, 'XData',newXdata);
set(hp, 'YData',newYdata);

Note that I did not test that, however it should work.