Thanks @andresrcs
it worked out finally.
I tried to run the winsorize function, I generated a single vector with my variable of interested, i tried to run the function as follow:
Winsorize(rev_vector), where rev_vector is numeric.
R gives me following error:
> Winsorize(rev_vector)
Error in `[.data.frame`(x, order(x, na.last = na.last, decreasing = decreasing)) :
undefined columns selected
I haven't found any replies on such an issue yet... Any ideas what this means?