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mmmaui
2011 Mar 18
1
Replace split with regex for speed ?
Have timestamp in format HH:MM:SS.MMM.UUU and need to remove the last "." so
it is in format HH:MM:SS.MMMUUU.
What is the fastest way to do this, since it has to be repeated on millions
of rows. Should I use regex ?
Currently doing it with a string split, which is slow:
>head(ts)
[1] 09:30:00.000.245 09:30:00.000.256 09:30:00.000.633 09:30:00.001.309
09:30:00.003.635 09:30:00.026.370
ts =...