Displaying 20 results from an estimated 1000 matches similar to: "categorical data analysis"
2012 Jan 18
4
confint function in MASS package for logistic regression analysis
I have the following binary data set:
Sex
Response 0 1
0 159 162
1 4 37
My commands
library(MASS)
sib.glm=glm(sib~sex,family=binomial,data=sib.data)
summary(sib.glm)
The coefficients in the output are
Estimate Std. Error z value Pr(>|z|)
(Intercept) -3.6826 0.5062 -7.274 3.48e-13
2007 Oct 19
6
r achives
sorry but how do i accsess r archives
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2007 May 01
7
logrank test
how do l programme the logrank test. l am trying to compare 2 survival curves
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2007 Oct 11
1
constraining correlations
Hello,
I've searched for an answer to no avail. I am wondering if anyone
knows how to constrain certain correlations to be equal. I have family
data with 2 twins per family plus up to 2 siblings. I would like to
somehow constrain all the sibling correlations (twin-sib and sib-sib)
to be the same while allowing the twin-twin correlation to be
different. Here is some simulated code:
2007 Nov 13
3
cronbach's alpha
hie
1...i'm trying to carryout a relibility testusing cronbach's alpha what fuctin do i use.
2.. this is more of a statistical question.if the alpha value for all the variables is negative what does it mean. and if the alpha value is negative for all tyha variables but is greater than 0.7 for some sections of the variables what does that mean
thanks in advance
2013 Sep 12
1
[LLVMdev] bug in X86 disasm code?
hi,
i found this code in X86DisassemblerDecoder.h
#define EA_BASES_32BIT \
ENTRY(EAX) \
ENTRY(ECX) \
ENTRY(EDX) \
ENTRY(EBX) \
ENTRY(sib) \
ENTRY(EBP) \
ENTRY(ESI) \
ENTRY(EDI) \
ENTRY(R8D) \
ENTRY(R9D) \
ENTRY(R10D) \
ENTRY(R11D) \
2006 May 30
1
sib TDT transmission/disequilibrium test
Does anyone know if the sib TDT has been implemented in R
1. Spielman, R.S., and Ewens, W.J. (1998) A sibship test for linkage in the
presence of association: the sib transmission/disequilibrium test. Am J Hum
Genet 62, 450-458
--
Farrel Buchinsky, MD
Pediatric Otolaryngologist
Allegheny General Hospital
Pittsburgh, PA
2007 Apr 19
1
Random number generator in R compared
I am trying to generate survival data using R .Im trying to randomly generate a column of 1s and 0 and another column randomly generated using an exponential distribution but l cant seem to get the random function. how do l go about it
thanks in advance
rt chiruka
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2009 May 05
2
[LLVMdev] [PATH] Fixes for the amd64 JIT code
Hi Zoltan,
The part that determines whether SIB byte is needed caused a lot of
regressions last night (see Geryon-X86-64 etc.). I've reverted it for
now. Please take a look.
Thanks,
Evan
On May 4, 2009, at 3:49 PM, Evan Cheng wrote:
> Committed as revision 70929. Thanks.
>
> Evan
>
> On May 3, 2009, at 8:29 PM, vargaz wrote:
>
>>
>> Hi,
>>
>>
2007 Apr 26
3
adding a column to a matrix
i would like to add a variable to an existing matrix by manipulating 2 previous variables eg for the data
m
treat strata censti survTime
[1,] 1 2 284.684074 690.4961005
[2,] 1 1 172.764515 32.3990335
[3,] 1 1 2393.195400 24.6145279
[4,] 2 1 30.364771 8.0272267
[5,] 1 1 523.182282 554.7659501
l
2009 May 05
1
[LLVMdev] [PATH] Fixes for the amd64 JIT code
Hi,
It looks like the problem was with the RIP relative addressing. The
original patch mistakenly
removed the || DispForReloc part because I tough that the RIP relative
addressing was done
by the SIB encodings, but it is actually done by the shorter ones.
The attached patch seems to work for me on linux and when simulating darwin
by forcing some variables in X86TargetMachine.cpp to their darwin
2009 May 05
0
[LLVMdev] [PATH] Fixes for the amd64 JIT code
Hi,
I can't reproduce these failures on my linux machine. The test machine
seems to be
running darwin. I suspect that the problem might be with RIP relative
addressing, or with
the encoding of R12/R13, but the code seems to handle the latter, since it
checks for
ESP/EBP which is the same as R12/R13.
Zoltan
On Tue, May 5, 2009 at 8:18 PM, Evan Cheng <evan.cheng at
2007 Apr 25
2
creating random numbers
l want to create a column of 1 and 2 randomly what command should l use
eg
treatment strata
1 1
2 0
1 1
2 1
2 0
2 1
2 0
1 0
these should be created randomly
secondly if l have
2007 May 02
2
missing package
l'm trying to find the "survdiff" package/function but it seems i cant get it how do l instal it if its not there
thanks
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2007 May 07
2
computing logrank statistic/test
hie how do you compute the logrank test using R
what commands do you use my data looks something like just an example
treatmentgrp strata censoringTime survivalTime censoring act.surv.time
[1,] 2 2 42.89005 1847.3358 1 42.89005
[2,] 1 1 74.40379 440.3467 1 74.40379
[3,] 2 2
2007 May 16
2
creating different strata
hie
l would like to create about ten strata l have tried using
sample(c(1,2),1,replace=TRUE) but all l get is a vector of 1 and 2 if i change it to sample(c(1,10),1,replace=TRUE) it gives me a vector of 1 and 10 how do l go about it
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2007 Nov 12
2
specifying decimal places
hie
how do I specify the number of decuimal places for my calulations
thanks
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2009 May 04
3
[LLVMdev] [PATH] Fixes for the amd64 JIT code
Hi,
If this looks ok, could somebody check it in ?
thanks
Zoltan
Evan Cheng-2 wrote:
>
> Looks good. Thanks.
>
> Evan
>
> On May 1, 2009, at 8:40 AM, Zoltan Varga wrote:
>
>> Hi,
>>
>> The attached patch contains the following changes:
>>
>> * X86InstrInfo.cpp: Synchronize a few places with the code
2007 May 07
4
creating a new column
hie l would like to create a 6th column "actual surv time" from the following data
the condition being
if censoringTime>survivaltime then actual survtime =survival time
else actual survtime =censoring time
the code l used to create the data is
s=2
while(s!=0){ n=20
m<-matrix(nrow=n,ncol=4)
2016 Nov 23
4
RFC: code size reduction in X86 by replacing EVEX with VEX encoding
Hi All.
This is an RFC for a proposed target specific X86 optimization for reducing code size in the encoding of AVX-512 instructions when possible.
When the AVX512F instruction set was introduced in X86 it included additional 32 registers of 512bit size each ZMM0 - ZMM31, as well as additional 16 XMM registers XMM16-XMM31 and 16 YMM registers YMM16-YMM31.
In order to encode the new registers of