non uniform time interval on the x axis chart 
Author Message
 non uniform time interval on the x axis chart

I am reading in data from instrument using the gpib wait for rqs in a
while loop.hence the time stamp for each data recieved is not uniform
 How do i put the data into the chart? The time on the x axis when i
tried using the bundle (data and seconds now) to the chart but it is
always inaccurate.
i would like to have a scrolling chart that will show the flucation of
the data as the vi is running
using labview6.1
thanx for anyone's help


Tue, 23 Nov 2004 15:30:34 GMT  
 non uniform time interval on the x axis chart
huatzai,

I suggest you look at the Variable-Time Chart XY.vi example that ships
with LabVIEW. It does exactly what you want to do. To find it, open
the Find Examples dialog (either when LabVIEW starts or from the Help
menu), go to the Search tab and type in 'xy chart'.

Randy Hoskin
Applications Engineer
National Instruments
http://www.ni.com/ask



Wed, 24 Nov 2004 04:14:01 GMT  
 non uniform time interval on the x axis chart

Quote:
> I suggest you look at the Variable-Time Chart XY.vi example that ships
> with LabVIEW. It does exactly what you want to do. To find it, open
> the Find Examples dialog (either when LabVIEW starts or from the Help
> menu), go to the Search tab and type in 'xy chart'.

Another option is to build a waveform from the data and the timestamp.
Wire the waveform to the chart, and it will correctly show the intervals.

To build a waveform, look at the waveform palette.

Greg McKaskle



Thu, 25 Nov 2004 02:40:18 GMT  
 non uniform time interval on the x axis chart
I will suggest you try this: each time you acquire a data get the time
stamp as well with "Get Date/Time in Seconds" or some other means that
is accurate for your need. Assembly your data into a cluster with
"Bundle"function then use "Shift Register" with "Buld Array" function
to form your array for plotting. You can then use the XY chart to plot
your data. For correct output, you have to format your x-axis to Time
& date.


Fri, 26 Nov 2004 21:36:36 GMT  
 non uniform time interval on the x axis chart
oh thanx
I got it working now


Sat, 27 Nov 2004 08:51:48 GMT  
 
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