howto find x value where x=max(x)
try this: with(fp, Frequenz[which.max(AmpNorm)]) baptiste
On 8 May 2009, at 14:49, Jonas Stein wrote:
Hi, fp is a data frame like this ,----[ fp ] | Frequenz AmpNorm | 1 3322 0.0379490639 | 2 3061 0.0476033058 | 3 2833 0.0592954124 | 4 2242 0.1275510204 `---- i want to find the "Frequenz" where "AmpNorm" is max. I use this line as workaround: PeakFreqHz = subset(fp, AmpNorm == max(AmpNorm))$Frequenz[1] Is there something nicer? And is there an easy way to do the same on "predict()" Thank you and kind regards, -- Jonas Stein <news at jonasstein.de>
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_____________________________ Baptiste Augui? School of Physics University of Exeter Stocker Road, Exeter, Devon, EX4 4QL, UK Phone: +44 1392 264187 http://newton.ex.ac.uk/research/emag