I would like to apply a function 'f' to the lagged version of a vector and
the vector itself.
This is easy to do explicitly:
mapply( f, v[-1], v[-length(v)] )
or in the case of a pointwise vector function, simply
f( v[-1], v[-length(v)] )
This is essentially the same as 'diff' but with an arbitrary function, not
'-'.
Is there a standard way to do this? Is there any particular reason that
'diff' should not have an 'f' argument?
-s
[[alternative HTML version deleted]]
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
