ASCII vs PDM

I have this big package that claims to TDMS files are smaller than ASCII files.

I have a table of 4 x 36790 I save in an ascii file and a tdms file.  The ascii (862 KB) file is significantly smaller than the tdms (1.12 MB) file.

Can anyone offer an explanation why this table NOR does not support my conclusions?

Are not sure (cannot run your code right now), but I'd be willing to bet that you are not save things with the same precision.  If your ascii data is only 7 characters long, it would be the same size as a double binary (I guess a delimiter of a byte in your text file).

Try to read back the files and subtracting one from the other - I bet you'll find a difference.  TDMS files are smaller than the same precision given ASCII files.

Tags: NI Software

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