Reverse the order of channels in a group of a TDMS file?

[EdoardoA]

Dear all,

I am trying to save a sequence of data arrays in different groups, ordered channel by channel.

However, I would need to reverse the order of the channel inside some groups!

For instance, in the exmple.vi I attach, how can I reverse the order of the channels in the group 1?

Thanks for helping!

Edo

[ZYOng · Accepted solution]

1. Place TDMS Open outside of the loop. The VI will run much faster.

2. You can write multiple channels within a single group in a single TDMS Write. You can reverse the array before writing the data.

[EdoardoA]

This is not exactly what I needed but the idea helped me in solving the problem!

Thanks a lot for helping!!

[Hooovahh]

Writing the data in the order you want from the start is the better option.  But here is some example code on how to rearrange the TDMS group and channel information after the file has been made.

https://forums.ni.com/t5/Example-Code/TDMS-Combine-and-Rerrange/ta-p/3782888

This is part of my Tremendous TDMS toolkit on VIPM.IO

https://www.vipm.io/package/hooovahh_tremendous_tdms/

[EdoardoA]

HI! I did check this tool already but since the amount of channels would be massive and the interchange quite recurrent I prefer to save them in the proper way and not post processing the TDMS file afterwards. Anyway, thanks for the answer!