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
回答（5 个）
Ilham Hardy
2014-12-30
0 个投票
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.
RuiQi
2014-12-30
0 个投票
1 个评论
Sean de Wolski
2014-12-30
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
2014-12-30
编辑：Sean de Wolski
2014-12-30
h = plot(cumsum(rand(1,10)),rand(1,10));
valueICareAbout = 3;
yICareAbout = interp1(h.XData,h.YData,valueICareAbout) % R2014b syntax
Ilham Hardy
2014-12-30
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 个评论
Sean de Wolski
2014-12-30
Even if not generating the plot yourself, you could use findobj to traverse the graphics tree.
Ilham Hardy
2014-12-30
Yes, very true. (i plan this as 'else' description)
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