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2001 May 09
2
[Newbie] Row-Iterator for data.frame??
...#39;s fast: sTable$WN4000
<- sTable$WN4000 / 1.34 .
but for some reasons i have to iterate through the spectra, especially when
i want to differentiate a curve, because then i first have to build a interpolation
polynom from the given x-points and y-values of a specific case.
i wrote a function getCase <- function( dataFrame, caseNo) with return-value
of type data.frame and holding the case "caseNo" of the dataFrame.
now, this results in absolutely bad performance.
my question:
what is the most convenient and fastest way to access a single row of a
data.frame? if possible, i'...