search for: souvik

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