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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 *) {This manual page was created by makman 1.45}{created by htmlink 1.62}