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br_sign
2007 Mar 29
1
creating conditional list of elements
...hink I got the answer. The following
would do:
> signalList <- list(tradingRules$Signal[tradingRules$Enabled]) [[1]]
> length(signalList)
[1] 2
Now my problem is shifted: I have the Signal column in the original data
frame referring to actual
matrices previously created in R. That is, bar_signal and cif_signal are
extant matrices. What I
need is the minimum number of rows in these matrices, so what I plan to do
is:
> n <- min(sapply(signalList, NROW))
but this doesn't work (it returns 1, but I have 2800 rows in each of
bar_signal and cif_signal, so I should
get 2800)
Is...