
Re: How to extract data points from a plot (can't use 'ginput')
Posted:
Jan 31, 2013 5:26 AM


"Forrest" wrote in message <g8upee$f4g$1@fred.mathworks.com>... > Thanks Steve. I just figured it out. Below is what I did > for those (like me) who are not very Matlab savy. > > First you must open the figure. > > openfig('fig1.fig'); %opens the figure > > h = findobj(gca, 'Type', 'line'); %gca gets 'handle' > %of the open figure > %h now has a value of 160.0106, not sure why but don't care > > get(h) %displays a list of all the 'tags', one of > %which is XData and YData, which contain the > %plot data > > X = get(h, 'XData'); > Y = get(h, 'YData'); > > Done!
Thanks a lot for the information.
But X & Y are of dimension 1x1001 with range 0 to 720 as I have ploted my curve. But I want to know the value of Y at the discrete interval like [1,2,3,...,720]. But the code X = get(h, 'XData'); gives me X= [1, 1.7, 2.3, ... , 720].
Can any body solve this problem?

