On 20/01/2018 6:53 AM, akshay kulkarni wrote:
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):
Try this:
k <- 1
k[5] <- 5
k
and you should see what's happening.
Duncan Murdoch
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
[[alternative HTML version deleted]]
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and provide commented, minimal, self-contained, reproducible code.
