graph

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

[Kavish Chaurasia]

there is a tool to locate the coordinate on a particular graph, which could be seen as an icon on the graph window.

Answer 1

[Gerd]

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

[Gerd]

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

Answer 2

[Gerd]

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.