Displaying 8 results from an estimated 8 matches for "souvik".
2006 Mar 15
3
Help on factanal.fit.mle
Hi
Can anybody please suggest me about the documentation of "factanal.fit.mle()"
(Not factanal()------ searching factanal.fit.mle() in R always leads to
factanal()).
Is there any function for doing principal component factor analysis in R.
Regards
Souvik Bandyopadhyay
JRF,
Dept Of Statistics
Calcutta University
[[alternative HTML version deleted]]
2006 Aug 10
1
How to fit bivaraite longitudinal mixed model ?
...are vectors of order 2.
Model 2
Y_ij, Y_ij2 | U_i = u_i ~ N(alpha + u_i + beta1*t_ij + U_i2*t_ij, Sigma)
U_i=(U_i1,U_i2) ~ iid N(0, Omega)
Sigma =bivariate AR structure
Here alpha and beta are vectors of order 2.
Moreover can we assume a structure for Omega.
Any help is greatly appreciated.
Souvik Banerjee
Junior Research Fellow
Dept of Statistics
University of calcutta
[[alternative HTML version deleted]]
2008 Dec 03
1
stuck with repeated values
...olate out the values that are repeated from the unique list of characters
in x (i.e. y<-c("a","b")). One method can be to use a loop on the which
function but that would be too time consuming. Any hint on using the apply
function effectively would be useful
Thanks and Regards
Souvik Bandyopadhyay
Lecturer,
Dept of Biostatistics,
Indian Institute of Public Health,
Hyderabad
[[alternative HTML version deleted]]
2008 May 17
1
Need some hint on faster data manipulation.
...eat this procedure for many data frames and nearly all
the data frame contains approximately 15,000 repeated characters with more
than 12,500 unique characters. Using the above code in a loop is taking a
considerable amount of time to compute.
Can anybody suggest me of a faster approach?
Regards
Souvik Bandyopadhyay
Research Fellow,
Dept Of Statistics
Calcutta University
[[alternative HTML version deleted]]
2006 Sep 01
0
defining error structure in bivariate mixed models
...ructure for the grouping unit as follows
sigma = ( sigma_1 0 )
( 0 sigma_2)
where
sigma_1 = sig1 * AR1(rho1) = error relating to variable 1
sigma_2 = sig2* AR1(rho2) = error relating to variable 2
How can I do this using lme()?
Any help is greatly appreciated.
Regards
Souvik Banerjee
Junior Research Fellow
Dept of Statistics
University of calcutta
[[alternative HTML version deleted]]
2007 May 08
0
Question on bivariate GEE fit
...uestion is whether there is any method to fit such data using
packages like gee or geepack (or may be any other package ) in R. The
function genZcor() of geepack can be used to construct correlation but
I have been unable to use it in the present context.
Any help is greatly appreciated.
Regards
Souvik Banerjee
Lecturer
Department of statistics
Memari College
Burdwan
India
[[alternative HTML version deleted]]
2008 Feb 24
0
problem with ML estimation
...[i,1]-mu1)^2/sig1)-
(2*rho*(y[i,1]-mu1)*(y[i,2]-mu2))/sqrt(sig1*sig2)+
(y[i,2]-mu2)^2/sig2))
}
return(nf)
}
constrOptim(startval,nf,NULL,ui=t(oneside),
ci=otherside,control=list(fnscale=-1))
}
mlebinorm(c(1,1,2,2,0.3),y)
############################################################
Souvik Banerjee
Lecturer
Department of statistics
Memari College
Burdwan
India
[[alternative HTML version deleted]]
2013 May 27
2
Error in running libvchan.
Hi,
I am trying to run libvchan on ARM Fast Model for VExpress platform for using inter domain communication. But there are some errors. I am attaching the strace outputs for vchan-node1 run in dom0 and domU. Has anybody faced these issues before.
Xl console 1The command is
Usage: vchan-node1 [client|server] [write|read] domid nodepath
my nodepath is - /local/domain/1/data/vchan-2-1
Regards