Dear friends,
I have a data set with 23 columns and 38000 rows. It is a panel running from
the years 1991 through 2005. I want to aggregate the data and get the medians
of each of the 23 columns for each of the years. In other words my output
should be like this
Year Median
1991 123
1992 145
1993 132
etc.
The sample lines of code to do this operation is
set1 <- subset(as.data.frame(dataset),rep1==1)
set2 <- subset(as.data.frame(dataset),rep1==0)
lst <- list(unique(yeara))
y1 <- aggregate(set1,lst,median)
y2 <- aggregate(set2,lst,median)
However I'm getting an error as follows
Error in FUN(X[[1]], ...) : arguments must have same length
Can somebody please help me with what I'm doing wrong here?
Thanks in advance
Regards
Anup
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