Re: [R] : unusual combinations of categorical data

2010-11-09 Thread Michael Friendly
On 11/8/2010 5:25 PM, Alan Chalk wrote: Regarding unusual combinations of factors in categorical data. Are there any R packages that can be used to identify the outliers i.e. unusual combinations in categorical datasets ? "Unusual combinations" of factors are those that have large residuals in

Re: [R] : unusual combinations of categorical data

2010-11-09 Thread Jim Lemon
On 11/09/2010 09:25 AM, Alan Chalk wrote: Regarding unusual combinations of factors in categorical data. Are there any R packages that can be used to identify the outliers i.e. unusual combinations in categorical datasets ? Hi Alan, If your factors are dichotomous and you are looking for common

Re: [R] : unusual combinations of categorical data

2010-11-08 Thread Michael Bedward
Perhaps just use the ftable function to generate a flat contingency table and look for counts below some threshold. Michael On 9 November 2010 09:25, Alan Chalk wrote: > Regarding unusual combinations of factors in categorical data. > Are there any R packages that can be used to identify the ou

Re: [R] : unusual combinations of categorical data

2010-11-08 Thread Joshua Wiley
Hi, On Mon, Nov 8, 2010 at 2:25 PM, Alan Chalk wrote: > Regarding unusual combinations of factors in categorical data. where all variables are categorical? > Are there any R packages that can be used to identify the outliers i.e. > unusual combinations in categorical datasets ? "outlier" or "u

[R] : unusual combinations of categorical data

2010-11-08 Thread Alan Chalk
Regarding unusual combinations of factors in categorical data. Are there any R packages that can be used to identify the outliers i.e. unusual combinations in categorical datasets ? Thanks. Notice of Confidentia