Big waveform to text
Hi,
I have to append waveform arrays to a single waveform then convert them to text file.
There are 8M lines (rows) X 60 column of character (maximum).
Then, I m facing "not enough memory" problem, and I think I have to save the waveform to binary files. But for viewing purpose, I still have to convert them to text file.
Any idea to view big waveform ?
Here I attached the VI and waveform which saved in binary format. Please advise. Thanks.
Attachments:
readBinaryToWfmToASCII.zip 204 KB
Is there a reason to use text vs binary? I usually switch to binary at about 10,000 points. That said, the advice you were given above is good. You can't do it all in one step. You have to break it up. I have one more tip for you. If you save your data so each text field is always exactly the same width (it can be padded with spaces), it is trivial to seek to a specific line by calculating the offset from the beginning of the file. With variable length fields, you need some sort of indexing. At that point, you should probably use binary (try TDMS or NI-HWS).
You may also want to read the tutorial on handling large data sets in LabVIEW.
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