| colMedians | R Documentation | 
Compute the sample medians of the columns (non-rows) of a data.frame or array.
colMedians( x, na.rm = FALSE )
| x | a data.frame or array. | 
| na.rm | a logical value indicating whether  | 
A vector or array of the medians of each column (non-row) of x
with dimension dim( x )[-1].
Arne Henningsen
rowMedians,median,colMeans.
   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" ]
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