Displaying 4 results from an estimated 4 matches for "covb".
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2009 Sep 04
2
lrm in Design package--missing value where TRUE/FALSE needed
Hi,
A error message arose while I was trying to fit a ordinal model with lrm() I am using R 2.8 with Design package.
Here is a small set of mydata:
RC RS Sex CovA CovB CovC CovD CovE
2 1 0 1 1 0 -0.005575280 2
2 1 0 1 0 1 -0.001959580 2
3 0 0 0 1 0 -0.004725880 2
0 0 0 1 0 0 -0.005504850 2
2 1 1 0 0 0 -0.003880170 1
2 1 0 0 1 0 -0.006074230 2
2 1 0 0 1 1 -0.003963920 2
2 1 0 0 1 0 0.000658230 2
2 1 0 1 0 1 -0.002033610 2
0 0 0 0 0 1 -0.007761770 2
0 0 0 0 1...
2011 Jan 27
4
HLM Model
...an option ddfm=bw followed by the model. How
can I show this method in R?(I am thinking that this maybe the reason that I
can't get the similar results)
below is my SAS codes:
proc mixed data=test covtest empirical;
class pair grade team school;
model score = trt pair grade school/ solution covb ddfm=bw ;
random int / sub=team solution type=un;
run;
I have tried both lmer and hglm, but non of them works.
Could anyone tell me how can I covert this SAS codes to R? Thanks
--
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Sent from the R help...
2007 Nov 21
1
equivalent of Matlab robustfit?
...final estimate of sigma, the larger of robust_s
and a weighted average of ols_s and robust_s
'se' standard error of coefficient estimates
't' ratio of b to stats.se
'p' p-values for stats.t
'covb' estimated covariance matrix for coefficient estimates
'coeffcorr' estimated correlation of coefficient estimates
'w' vector of weights for robust fit
'h' vector of leverage values for least squares fit
'dfe'...
2004 Jul 20
5
Precision in R
Greetings.
I'm trying to recreate in R some regression models I've done in SAS,
but I'm not getting the same results. My advisor suspects this may be
due to differences in precision between R and SAS. Does anyone know
where I can find specifications for R's type double? (It doesn't seem
to be in the R Language Definition.) Thanks in advance for any help
anyone can