[R] Creating panel data
r at jp.pair.com
Mon Jul 23 17:21:15 CEST 2012
I'm new to R.
I am trying to create panel data with a slight alteration from a typical
At present, I have data on a few hundred people with the dates of
occurrences for several events (like marriage and employment). The dates are
in year/quarter format, so 68.0 equals the 1st quarter of 1968 and 68.25
equals the 2nd quarter of 1968. If the event never occurred, 0 is recorded
for the Year Of Occurrence. Somewhat redundantly, I also have separate
dichotomous variables indicating whether the event ever occurred (0/1
x <- data.frame( id = c(1,2), Event1Occur = c(1,0), YearOfOccurEvent1 =
c(68.25,0), Event2Occur = c(0,1), YearOfOccurEvent2 = c(0,68.5))
I need to transform that dataframe so that I have a separate row for each
time period (year/quarter) for each person, with variables for whether the
event had already occurred during that time period. If the event occurred
during an earlier time, it is presumed to still be occurring at later times.
E.g., if the person got married in the first quarter of 1968, they are
presumed to still be married at all later time periods. I need those time
periods marked (0/1).
y <- data.frame( id = c( rep (1,5), rep (2,5)), Year=c
y $ Event1 <- c (0,1,1,1,1,0,0,0,0,0)
y $ Event2 <- c (0,0,0,0,0,0,0,1,1,1)
can someone get me started.
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