how do i name a dynamic data signal for file i/o

[ewong]

I have five signals (max, min, mean, std dev., and # of readings) merging into a single signal and writing to a measurement file. When I open my saved file after retrieving data I have a spreadsheet with five untitled columns. I am wondering how I name those columns within my program as I am collecting large quantities of data. Thank you!

[MikeS81]

Hi ewong,
you can use the express vi to convert the dynamic signal to a waveform. With this you can change the signal names.
See this link please.

Hope it helps.
Mike

[ewong]

I had seen similar threads to that one after posting and tried implementing them in my code. However my results were not what I was looking for. When I tried changing the channels names indvidually I no longer recieved data in my lvm or my graph and when I tried changing the channel name of the merged signal my column headers were "comment", "comment1", "comment2" and so on. I 'll post my VI without the above changes and maybe someone will be able to tell me what I'm doing wrong . Thanks again.

[ewong]

So apparently the forums dont like me trying to upload such a large code so I am attaching a jpeg.

[MikeS81]

Hi ewong,

why don´t you make what the example from the link shows? Try this please.

Mike

[ewong]

I have tried that but it only labels the header as a single "comment" and a number value. What I want to do is label the individual headers as max, min, mean, std dev, and # of runs. Maybe I'm just missing something but when I incoporate that example into my code I get headers like test0000, test0001, test0002, and so on. Thanks for all your help though.


Message Edited by ewong on 08-06-2008 09:54 AM

[ewong]

I got it!

http://forums.ni.com/ni/board/message?board.id=170&message.id=308326&query.id=63578#M308326

the link above helped me finally realize it. By adding a case stucture with the different string names in different cases it labels the individual channels. Thanks for all your help Mike.