[R] a vector unusually getting NA values.....
akshay kulkarni
akshay_e4 at hotmail.com
Sat Jan 20 12:53:50 CET 2018
dear members,
I have a function by name "ygcudf" and a list of stock names by name"snl" ( of class "list"). ygcudf acts on snl and returns a list of the most favourable stocks. I don't wish to divulge the code of the function, for genuine reasons, but the algorithm is as follows:
{
k <- 1; i <- 1
for(j in 1:length(snl)){
if(snl[[j]] == "condition") {
k[i] <- j
i <- i+1}
}
snlf1 <- snl[k]
return(snlf1)
}
The problem is, if we test the function by returning the vector k, it, (k), is getting NA values. i.e, instead of skipping the values of j for which the condition is false, k is getting populated by NA values. k is getting the following values (for a given snl):
k
[1] 1 NA NA NA 5 6 NA NA 9 10 11 NA NA NA NA 16
If j is initialised to the values for which k is NA, and the function is made to return j, it is returning the relevant j. I don't know how the k is getting NA values. Will the following change work:
snlf1 <- snl[na.omit(k)]
What is wrong ??
Sorry for not parting with the code...please bear with me....
your help will be highly appreciated
yours sincerely,
AKSHAY M KULKARNI
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