XploRe Help : relationchi2

Keywords - Function groups - @ A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Library:	stats
See also:	relation relationcont relationcorrcont relationrank relationcorr

Quantlet:		relationchi2
Description:		Computes the Chi^2 coefficients for discrete data.

Usage:	`rel = relchi2 (x {, colname {, opt})`
Input:
	`x`	n x p variables
	`colname`	n x p variable names
	`opt`	q x 1 text vector of optional parameters
Output:
	`rel.r`	p x p matrix of chi^2 values
	`rel.pval`	p x p significance level of chi^2 statistics

Note:

To compute the chi^2 coefficient non-interactively you need to set opt = "automatic". In the interactive mode you will get a menu sorted after the largest coefficients. If you click on the coefficient you will get the crosstable of the corresponding variables.

Example:

; loads the library stats library("stats") ; read swiss banknote data ; actually these data are continuous, but the first ; three variables have approx. 20 realizations x = read("bank2") ; compute the chi^2 statistic and its pvalues ; automatically colname = string("X%0.f", 1:cols(x)) relationchi2(x, colname, "automatic")

Result:

Contents of rel.r
[1,]     4000   340.93   440.24   1054.5   641.76   982.71
[2,]   340.93     3200   472.66   810.69   570.29   709.79
[3,]   440.24   472.66     3600   937.03   596.87   779.53
[4,]   1054.5   810.69   937.03     9800   1793.3   2043.2
[5,]   641.76   570.29   596.87   1793.3     6800   1608.6
[6,]   982.71   709.79   779.53   2043.2   1608.6     8200

Contents of rel.pval
[1,]        0  0.20152  0.0024184  0.048822     +NAN  7.3697e-05
[2,]  0.20152        0  3.8681e-11   0.2472  0.21048  0.071514
[3,]  0.0024184  3.8681e-11        0  0.096837     +NAN   0.1404
[4,]  0.048822   0.2472  0.096837        0  0.015248  0.29226
[5,]     +NAN  0.21048     +NAN  0.015248        0  5.1065e-05
[6,]  7.3697e-05  0.071514   0.1404  0.29226  5.1065e-05        0

Author: S. Klinke, 19970820