How do I detect which point a user selects on an xy graph

[Steve_Block]

Hopefully this is trvial but I have a VI with an xy graph and an event structure in a loop. When an operator clicks on a sample I want to be able to determine which sample was clicked on? Does anyone know how to do this or have a good example? Thanks.

[James.M]

You can use a mix of the Mouse Down event and a Map Coords to XY method to allow the user to select a data point with a click. 

Theck out the last comment on this thread.

[Steve_Block]

I found a map coordinates to XY but want a snapped answer.

[James.M]

If you create a Cursor, you can write the XY that is output directly tot he Cursor Position with a property node and the cursor will snap to the graph.

You can then use the cursor's info to pull the specific data point.