Displaying 5 results from an estimated 5 matches for "shoaaib".
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shoaib
2007 Nov 22
5
testing independence of categorical variables
...that the lengths of the two
vectors don't match. Suppose X and Y are two factors. X has 5 levels
and Y has 7 levels. This is what i tried doing
>temp<-chisq.test(x,y)
but got error "the lengths of the two vectors don't match". any help
will be appreciated
--
Regards,
Rana Shoaaib Mehmood
2007 Nov 16
7
sorting factor levels by data frequency of levels
...;
I WANT THE FACTOR LEVELS TO BE SORTED IN ORDER OF DESCENDING DATA
FREQUENCY IN EACH LEVEL. IN OTHER WORDS I WANT THE LEVEL WHICH HAS THE
HIGHEST FREQUENCY IN STATE TO APPEAR FIRST, FOLLOWED BY ONE WHICH HAS
THE SECOND HIGHEST FREQUENCY AND SO ON.
Any help will be appreciated
--
Regards,
Rana Shoaaib Mehmood
2007 Nov 13
2
plotting coxph results using survfit() function
...=rep(mean(Y),2))
> detach()
> plot(survfit(mod.phm, newdata=DataFrame.X), lty=c(1,2),ylim=c(.6,1))
Error in `contrasts<-`(`*tmp*`, value = "contr.treatment") :
contrasts can be applied only to factors with 2 or more levels
any help will be appreciated.
--
Regards,
Rana Shoaaib Mehmood
2009 Feb 12
2
R Connection with Teradata (Windows)
Hi all,
I am trying to connect Teradata with R using Windows. Due I need to install any specific package or what? I am bit clue-less. Can someone help.
Regards,
Saj
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[[alternative HTML version deleted]]
2007 Nov 23
0
R users in Cyprus
...ality Statement:
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------------------------------
Message: 24
Date: Wed, 21 Nov 2007 08:29:17 -0600 (CST)
From: Terry Therneau <therneau at mayo.edu>
Subject: Re: [R] plotting coxph results using survfit() function
To: shoaaib at gmail.com
Cc: r-help at stat.math.ethz.ch
Message-ID: <200711211429.lALETHF13249 at hsrnfs-101.mayo.edu>
Content-Type: TEXT/plain; charset=us-ascii
The survfit function, when applied to the results of a Cox model, will give
the predicted survival curve for any particular combination of...