[R] howto find x value where x=max(x)

[baptiste auguie]

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 Auguié

School of Physics
University of Exeter
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