in my previous post in which i asked about creating sequences
from two vectors of numbers, all suggestions worked.
tradevectors<-mapply(seq,from=tempa,to=tempb)
or
tradevectors<-sapply(1:length(tempa),function(x) seq(tempa[x],tempb[x])
>both return a list with 3 components.
the problem is that i want to take these 3 sequences and
use them as the indices of two other vectors, X and Y and mutiply them (
element by element )
>so, i tried
>
>temp<-sapply(1:length(tradevectors),function(i)X[tradevectors[[i]]]*Y[tradevectors[[i]]]
basically, the sequence output from the previous command are
indices to two vectors that i want to multiply ( element
by element ).
but, the message i get is that i cannot coerce list object to double.
i looked up the info on unlist, but that just
makes long vector. i need 3 vectors.
thanks
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