Copying large channels

[Andrea12345]

Hi, I have got some large channels (lenght 3M) that I need to copy and paste in different groups within a TDMS file. When I copy them, the software freezes for a few minutes before allowing me to do anything else. Pasting is then done instantaneosly.

Is there a way to speed up the copying process? Thank you. 

[Walter_Rick]

Hi Andrea12345,

The question is how you copy and paste the channel parts.

In case you use a script, the best option is using the Data-API

dim oSourceChn, oTargetChn

set oSourceChn = Data.Root.ChannelGroups(1).Channels(1)
set oTargetChn = Data.Root.ChannelGroups(1).Channels.Add("Target", DataTypeChnFloat64)

oTargetChn.SetValuesBlock(oSourceChn.GetValuesBlock(1, 5000))

In case you do that interactively you have several options:

A) Loading directly a part of a channel in NAVIGATOR:

B) Using VIEW

In this case you display the data in a 2D axis system in VIEW, select the band cursor, positioning the band cursor to the begin and end of the data area to be copy, flag this area and copy it.

[Dia791]

Hello Andrea12345,

what we sometimes do in similar cases, is scaling of the corresponding channel. At least in our "old" Diadem-2015 it was much easier as copying or generating of a new channel; just one line in code, requiring no further actions.

Maybe that could help you too...