On Feb 25, 2011, at 8:28 PM, zem wrote:
hi all,
i have a little problem, i have some code writen, but it is to slow...
i have a dataframe with a column of time series and a grouping column,
really there is no metter if in the first col what kind of data is,
it can
be a random number like this
x<-rnorm(10)
gr<-c(1,3,1,2,2,4,2,3,3,3)
x<-cbind(x,gr)
That is not a dataframe. It is a matrix. And not all time series
objects are the same, so you should not assume that any old two column
object will respond the same way to R functions.
now i have to look for every row i , for this group, how much from
the x[,1]
is in a range from x[1,i] such x[1,i] (+/-) k (k is a another number)
You may find that the function, findInterval, is useful. I cannot
determine what you goal is from the description and there is no
complete example with a specification of what correct output would
be .... as you should have seen requested in the Posting Guide.
--
David Winsemius, MD
West Hartford, CT
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