XY graph memory length

[zoran]

How do you set depth of XY Graph? After a while I cannot scroll to the first measurement. On Chart you can change "Chart History Length" but I didn't find something like it for XY Graph.

Thanks

[Dennis_Knutson]

An  xy graph will display all of the data passed to it and does not have a history setting. Are you sure it's a normal xy graph and not the xy chart from the examples?

[zoran]

It's "Build XY Graph" from Express vi pallet. After a while first points are gone, and looks like there is no way to control number of points on the plot.

I put example in attachment.

[Dennis_Knutson]

Well, I have never use the express VIs and probably never will. Using the normal xy graph is not that hard.

Message Edited by Dennis Knutson on 02-04-2009 02:38 PM

[zoran]

I wander what will happen with this graph if keeps just adding points. If there is no way to set buffer size it might slow down the whole system. 

[Dennis_Knutson]

Of course it will slowdown. It will depend on how long your run it. Look at the shipping example called XY Chart if you want to use a buffer to limit the size. That contradicts your orignal problem of not being able to scroll back to the beginning of the data.