[R] foreloop? aggregating time series data into groups
ian.jhsph at gmail.com
Mon Nov 1 20:34:20 CET 2010
I have a data set similar to the set below where 1 and 2 indicate test
results and 0 indicates time points in between where there are no test
results. I would like to allocate the time points leading up to a test
result with the value of the test result.
What I have: What I want:
I have attempted methods creating a data.frame of the the breaks/changes in
of values to from 0 to 1 or to 2.
x1 <- which(diff(x) == 1)
x2 <- which(diff(x) == 2)
What ever the solution, I can't be entered by hand due to the size of the
dataset (>10 million and change). Any ideas? This is my first time posting
to this forum and I am relatively new to R, so please don't flame me to
hard. Desperate times call for desperate measures. Thanks.
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