graph
显示 更早的评论
hi
how can i select a point from a graph? i have a graph and i want to select a point from it and do some works with its coordinate(x & y). i want to select on graph and recieve x & y coordinate
thank u
1 个评论
Kavish Chaurasia
2011-6-29
there is a tool to locate the coordinate on a particular graph, which could be seen as an icon on the graph window.
采纳的回答
Gerd
2011-6-28
2 个投票
Hi Armin,
you can use datacursor mode.
In the callbackfunction you can play with the points (x & y ) received from the callback. If you do need an example leave me a note.
Gerd
1 个评论
Gerd
2011-6-29
Hi Armin,
of course you can use a GUI to fulfill your requirements but you don't have to use one.
Here is short example:
x=linspace(0,10,1000);
y=sin(x);
plot(x,y)
dcm = datacursormode;
Now you can click into your figure and the x and y values are displayed.
If you want to calculate something with these values you can simply type
position = getCursorInfo(dcm);
in the command window and you have the answer of the position in the graph.
You can also use the callback function by typing
set(dcm,'UpdateFcn',{@myupdate})
Now the myupdate function is called everytime you click into your figure.
Please have a look at the documentation
help datacursormode
The command is well documented.
Gerd
更多回答（1 个）
Gerd
2011-6-29
0 个投票
When you run your m-file and nothing is selected on the graph the position variable is empty. When your m-file is finished the position is stored and you can display the result in the command window. I would suggest to use the callback function so everytime you click on your figure you receive the position values.
类别
在 帮助中心 和 File Exchange 中查找有关 Creating, Deleting, and Querying Graphics Objects 的更多信息
产品
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
