Displaying 3 results from an estimated 3 matches for "to166".
2004 Jun 16
2
subset and lme
I'm puzzled by the following problem, which appears when
attempting to run an analysis on part of a dataset:
If I try:
csubset <- dat$Diagnosis==0
cont <- lme(fixed=cform,
random = ~1|StudyName,
data=dat,subset=csubset,na.action=na.omit)
Then I get:
Error in eval(expr, envir, enclos) : Object "csubset" not found
But if I do
2010 Feb 23
5
deleting column from data frame
Hi to all,
test <- data.frame("X"=c(1:4),"Y"=c(5:8),"Z"=c(8:11))
test <- test[,-2]
Is there a way to specify the col name "Y" to delete instead the number?
Kind regards Knut
2010 Feb 18
0
lme - incorporating measurement error with estimated V-C matrix
I have data (each Y_i is a vector) in the form of
Y_i = X_i \beta_i + Z_i b_i + epsilon_i
Were it not for the measurement error (the epsilon_i) it's a very
simple model --- nice and balanced, compound symmetry, and I'd just
use lme(y ~ x1 + x2, random=~1|subj, ...) but the measurement error is
throwing me off.
Because the Y_i are actually derived from other data, I am able