How do I get object data from a FIG file, such as X and Y data?

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i search on matlab searching question but not found it.
I have a graph with a curve. I want to know the Y value from my graph
example X = 10
how to find Y?
thx.
  4 Commenti
GS76
GS76 il 10 Feb 2020
Thank you MRR!
Your reply helped me greatly.
Much appreciated.
afiq hassan
afiq hassan il 25 Apr 2020
But what if I want to find x values using y axis?

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Risposta accettata

Julian Laackmann
Julian Laackmann il 14 Ago 2012
Modificato: MathWorks Support Team il 9 Nov 2018
Open the figure using “openfig” and return the “Figure” object as an output argument, such as "fig". Then use “fig” to access the underlying objects in the figure.
fig = openfig('MySavedPlot.fig')
For example, if the figure contains a line plot, you might want to get the X and Y data for the line. You can get the X and Y data using the XData and YData properties of the "Line" object. You can access the "Line" object through the "Children" property of the axes. You can access the "Axes" object through the “Children” property of the figure.
ax = fig.Children
ln = ax.Children;
X = ln.XData;
Y = ln.YData;
  3 Commenti
Image Analyst
Image Analyst il 14 Ago 2012
So all you have is a .fig file with the saved figure? You have absolutely no way to get the original data that was plotted to make the figure? There are submissions in the File Exchange to help you digitize values off a picture, such as http://www.mathworks.com/matlabcentral/fileexchange/36904-matlab-script-for-digitizing-a-published-graph

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Più risposte (2)

uncung fgv
uncung fgv il 14 Ago 2012

asma chaudhry
asma chaudhry il 11 Set 2018
Use Matlab's data cursor to find the first intersection of the line y=x with the graph of y=tan(x) in the first quadrant. Enter your answer as a decimal with 3 decimal places

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