Locate Y given X and display on the graph
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Hello ,
I have been trying to display the value of X and Y given either X or Y on my graph but am unable to do so. I would also like to be able to add in additional info/text and be able to re-size the box. The following was done through of the Data Cursor function which is not accurate. Please help , thanks.
Regards , Haziq

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Risposte (5)
Ilham Hardy
il 30 Dic 2014
You can 'extract' the Data Cursor information to workspace for more accurate number. Right click on the data cursor point >> Export cursor data to workspace.
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RuiQi
il 30 Dic 2014
1 Commento
Sean de Wolski
il 30 Dic 2014
To do this correctly, you'd have to get the x/y data from the line and then use interp1 to get you the value of y at x == 3.
Sean de Wolski
il 30 Dic 2014
Modificato: Sean de Wolski
il 30 Dic 2014
h = plot(cumsum(rand(1,10)),rand(1,10));
valueICareAbout = 3;
yICareAbout = interp1(h.XData,h.YData,valueICareAbout) % R2014b syntax
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Ilham Hardy
il 30 Dic 2014
Refering to your description,
If you generate the graph yourself using plot function, then simply interpolates your xpoint to find the applicable ypoint.
Please see,
doc interp1
2 Commenti
Sean de Wolski
il 30 Dic 2014
Even if not generating the plot yourself, you could use findobj to traverse the graphics tree.
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