Reading out Chart history with X scale

[johanneshoer]

Hello,

I am using a chart in a vi and sometimes I read out the chart history via the property node and save it in a spread sheet file.

That works quite good, but I have one problem: the chart history contains only the data, but no information about the X scale, which is the time scale in my case. The chart history is worthless without the X scale.

How can I read out the X scale or save the chart history with a x scale or time scale?

LabVIEW 7.1

[elset191]

There are properties for the X Scale.  These properties include Min and Max.  I don't know if two points are specific enough for you though.

[johanneshoer]

Tim,

thank you for the quick response. Yes, I know these two properties, Min and Max, but that is not enough, I need the time for each value. I wonder why the chart history does not contain the time?

Johannes 

[Coq_Rouge]

The property you need is named "Offset and Multiplier" under X and Y scale

[Dennis_Knutson]

Neither a chart or graph contains 'time'. Your x axis is simply the number of times you write to the chart. Everyting else is just formatting options with x offset and multiplier properties. Knowing these and the last x value will alow you to create a time array. Since the chart, unlike a graph, has a limited history, you would have to work backwards. In other words, the x max, x multiplier, and x Offset would represent the last time recorded.