Displaying 2 results from an estimated 2 matches for "simpred".
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simpled
2023 Aug 31
1
simulating future observations from heteroscedastic fits
...ry(nlme)
(fit12 <- lme(y~1, data=DF3_2, random=~1|gp))
(fit22 <- lme(y~gp, data=DF3_2, random=~1|gp))
library(lme4)
(fit12r <- lmer(y~1+(1|gp), data=DF3_2, REML=FALSE))
(fit22r <- lmer(y~gp+(1|gp), data=DF3_2, REML=FALSE))
# I can simulate what I want for fit11 and fit21
# as follows:
simPred <- function(object, nSims=2){
pred <- predict(object, DF3_2[6,], se.fit=TRUE,
interval='prediction')
with(pred, fit[1, 'fit'] +
se.fit*rt(nSims, df))
}
simPred(fit11)
simPred(fit21)
# How can I do the same with either fit12 and fit22
# or f...
2002 Jan 25
0
Simplex difficulties
I'm exploring the simplex algorithm with a simple transportation problem
of the form:
minimize:
8a + 6b + 10c + 9d + 5e + 7f
subject to the constraints:
a + b + c = 11
d + e + f = 14
a + d = 10
b + e = 8
c + f = 7
I've implemented this in R (1.4.0 (2001-12-19), SunOS 5.7) as:
require(boot)
costs = c(8,6,10,9,5,7)
constraints = c(
1,1,1,0,0,0,
0,0,0,1,1,1,
1,0,0,1,0,0,