Read number of channels dynamically

Question

Hi ,
I have a test file in .dat format.  Normally we will have 4 channels. Time, Accleration1 and Accleration2, Upper Limit and Lower limit.
Where I plot Time v/s Accleration1 and Accleration2.
In future, test file may contain Accleration 3, Accleration 4, .. Accleration 10. So, how can I make a script to dynamically read the number of channels that are loaded to a data portal and plot all of them on report.   (whichever is existing. )
I read in help to use globusedchn. How can i use it in script.
Should I have to use ny looping statements? please help.

Answer 1

Hello RSH,
There is a function in DIAdem REPORT to do exactly what you are asking for, which is to dynamically plot n number of channels in a file based on however many channels are contained in a file.
First of all, we need to make sure you data is stored as Waveforms, not channels which is done by using the "Numeric Channels <-> Waveform Channels" function in DIAdem ANALYSIS (this can be done in a Script too):
Once all your channels are Waveforms, we can move on to REPORT.
Go to the Settings menu in "REPORT" and switch on the "Curve Expansion" mode:
I have thre Waveforms loaded called "Noise", Noise1" and "Noise2" in my DataPortal
In your Axis Layout, delete the group reference and add a "*" to the end of the channel name:
Here is the result, which will dynamically add channels based on how many "Noise*" channels are in the DataPortal:
Hope that helps,
     Otmar
Otmar D. Foehner
Business Development Manager
DIAdem and Test Data Management
National Instruments
Austin, TX - USA
"For an optimist the glass is half full, for a pessimist it's half empty, and for an engineer is twice bigger than necessary."