Automatically update plot with horizontal line based on brush

Hello,

I am trying to add a horizontal line to a plot. The axis position of this line is dependent on the data selected with the brushing tool. I have managed to do this with a button that needs to be clicked when the selection of data using the brushing tool is complete (running the function to add the line). However I would like to miss out the button stage and have it update automatically.

Is there a way to run a function based on when the selection is complete? (and run again if a new selection is done)?

Thanks

Andy

[Andy]

Does anyone have any ideas? Do you need any more information?

Cheers