[R] Finding Coordinate of Max/Min Value in a Data Frame

From: Gundala Viswanath <gundalav_at_gmail.com>
Date: Wed, 11 Jun 2008 19:34:47 +0900


Hi,

Suppose I have the following data frame.

__BEGIN__
> library(MASS)
> data(crabs)
> crab.pca <- prcomp(crabs[,4:8],retx=TRUE)
> crab.pca$rotation

         PC1 PC2 PC3 PC4 PC5

FL 0.2889810  0.3232500 -0.5071698  0.7342907  0.1248816
RW 0.1972824  0.8647159  0.4141356 -0.1483092 -0.1408623
CL 0.5993986 -0.1982263 -0.1753299 -0.1435941 -0.7416656
CW 0.6616550 -0.2879790  0.4913755  0.1256282  0.4712202
BD 0.2837317  0.1598447 -0.5468821 -0.6343657  0.4386868

__END__ Is there a way to identify the "coordinate" of a max/min value of all the points above.

For example the coord of maximum value is (RW,PC2) = 0.865, and coord of min value is (CW,PC2) = - 0.288.

-- 
Gundala Viswanath

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Received on Wed 11 Jun 2008 - 13:39:49 GMT

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