Odd behavior of graph

[Yves]

Hi

I'm trying to display the online data in a graph with a fixed origin and a variable end.
The x scale shows time in seconds.
The fixed origin of the x scale is 0. Within the first 15 seconds the data fills out the graph.


When I'm running the attached main.vi the graph is initialized correctly but the x-scale doens't stay fixed on the defined range.
WHY?


Thanks for any help.

Yves

[GerdW]

Hi Yves,

I cannot test your vi as the DAQ.vi is missing...

But maybe you should switch on XAxis-Autoscale for the graph?
If you want to display the same on the graph and the chart you have to collect the data for the graph in an array (using a shift register in the while loop)...

Message Edited by GerdW on 10-25-2007 09:36 AM

[AlexxxR]

Hi Yves,

I don´t understand what you want to do with the Part in front of the While Loop?

Because there you set the X-Offset to a huge negativ value!

You should have a look at the example:

charts.vi in the Example Finder!

Best regards

Alex Rudolph

NI Switzerland

[Ben]

Try clicking the "Ignore Attributes" option.

When not checked the charts pick-up the "x" values from the data presented.

Ben

Message Edited by Ben on 10-26-2007 07:29 AM