Medians of Columns

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Description

Compute the sample medians of the columns (non-rows) of a data.frame or array.

Usage

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colMedians( x, na.rm = FALSE )

Arguments

x

a data.frame or array.

na.rm

a logical value indicating whether NA values should be stripped before the computation proceeds.

Value

A vector or array of the medians of each column (non-row) of x with dimension dim( x )[-1].

Author(s)

Arne Henningsen

See Also

rowMedians,median,colMeans.

Examples

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   data( "Electricity", package = "Ecdat" )
   colMedians( Electricity )

   a4 <- array( 1:120, dim = c(5,4,3,2),
      dimnames = list( c("a","b","c","d","e"), c("A","B","C","D"),
      c("x","y","z"), c("Y","Z") ) )
   colMedians( a4 )
   median( a4[ , "B", "x", "Z" ] )  # equal to
   colMedians( a4 )[ "B", "x", "Z" ]