Displaying 2 results from an estimated 2 matches for "tau0".
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tap0
2004 Aug 09
0
Need help on this problem!
...Q3 Max
-2.5233682 -0.6801665 -0.1735055 0.5243569 2.7772921
Number of Observations: 666
Number of Groups: 111
However, when I tried to fit the following model and the
starting value is very close to the true value:
> simu.nlme<-nlme(gf~b00 + b10 * age + b20 *
max(0,(age-tau0)),data=simu1,fixed=b00+b10+b20+tau0~1,random=b00+b10+b20+tau0~1,group=~id,
start=c(b00=4.08,b10=5.32,b20=-5.29,tau0=14.8),method="REML")
It shows following error:
**************************************
Error in MEEM(object, conLin, control$niterEM) :
Singularity in backsolve at...
2006 Nov 18
4
array indexes in C
I am passing (numeric) arrays to a C function, called with .C. To the
best of my knowledge, I can do this in R by passing it as a vector
(with as.vector) to the .C call.
However, it would be useful to access the array as an array inside C,
ie not have to calculate how array indices (i,j,k) map to the vector
elements. What is the right way to do this? Are there convenience
functions to do the