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 = strsplit(ts, ".", fixed = TRUE)
ts=lapply(ts, function(x) { paste(x[1], ".", x[2], x[3], sep="") } ) #
Remove last . from timestamp, from HH:MM:SS.MMM.UUU to HH:MM:SS.MMMUUU
ts = unlist(ts)
Thanks,
Chris
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