which.min                package:base                R Documentation

Where is the Min() or Max() ?

Description:

     Determines the location, i.e., index of the (first) minimum or
     maximum of a numeric vector.

Usage:

     which.min(x)
     which.max(x)

Arguments:

       x: numeric (integer or double) vector, whose 'min' or 'max' is
          searched for.

Value:

     Missing and 'NaN' values are discarded.

     an 'integer' of length 1 or 0 (iff 'x' has no non-'NA's), giving
     the index of the _first_ minimum or maximum respectively of 'x'.

     If this extremum is unique (or empty), the results are the same as
     (but more efficient than) 'which(x == min(x))' or 'which(x ==
     max(x))' respectively.

Author(s):

     Martin Maechler

See Also:

     'which', 'max.col', 'max', etc.

     'which.is.max' in package 'nnet' differs in breaking ties at
     random (and having a 'fuzz' in the definition of ties).

Examples:

     x <- c(1:4,0:5,11)
     which.min(x)
     which.max(x)

     ## it *does* work with NA's present, by discarding them:
     presidents[1:30]
     range(presidents, na.rm = TRUE)
     which.min(presidents) # 28
     which.max(presidents) #  2

