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{version = 1.02; (* of rara.p 1993 March 16}
(* begin module describe.rara *)
(*
name
rara: rank-rank reformulation of a data set
synopsis
rara(data: in, xyin: in, output: out)
files
data: a data set with two columns. '*' on the start of lines
are comments copied to the output xyin file.
xyin: Doubly sorted data. The first two columns are the original two data
columns. The first data column is sorted. The third column is the rank
of the first column (1 to n, in order). The forth column is the rank of
the second column (1 to n but no longer in order).
output: messages to the user
description
To test data correlations but to make them insensitive to outliers, the data
can be ranked and then graphed or the correlation coefficient found by
xyplo.
First, the data pairs are sorted on the second data column. The second data
column is then assigned ranks (1 to n). The data are then sorted again on
the first data column and the first data column is assigned ranks. This
leaves the first data column sorted.
examples
documentation
see also
xyplo.p
author
Thomas Dana Schneider
bugs
technical notes
*)
(* end module describe.rara *)
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