Displaying 5 results from an estimated 5 matches for "modelformula".
2011 Dec 16
1
simulation
I'm using an R program (which I did not write) to simulate multilevel data
(subjects in locations) used in power calculations. It uses lmer to fit a
mixed logistic model to the simulated data based on inputs of means,
variances, slopes and proportions:
?
(fitmodel <- lmer(modelformula,data,family=binomial(link=logit),nAGQ=1))
where modelformula is set up in another part of the program.? Locations are
treated as random and the model is random intercept only.? The program is
set?to run 1000 simulations.
?
I have temperature, five levels of gestational age (GA), birth wieght (BW)...
2011 Mar 04
1
Probabilities outside [0, 1] using Support Vector Machines (SVM) in e1071
...875 2559.494 48507.312 3925.7563 63 20616
2 1587 39 3148.056 -895.0187 4043.075 5937.669 910.9062 55 15156
3 1610 40 4116.918 172.6812 3944.237 2287.431 196.0312 51 2739
4 1495 43 3678.381 236.9250 3441.456 3298.625 23.9875 86 281
5 1564 43 3010.988 -623.6063 3634.594 3416.350 819.6375 34 3848
...
modelFormula <- as.formula(Present ~ X02 + X03 + X05 + X06 + X07 + X13 +
X14 + X15 + X18)
Model <- svm( modelFormula,
data=Data,
gamma=0.25,
cost=4,
nu=0.10,
kernel='radial',
scale=TRUE,
type='nu-regression',
na.action=na.omit,
probability=TRUE
)
bgPreds <- predict(
Model,
newdata=bgE...
2011 Nov 15
1
package installtion
I'm getting the following error in a script: "Error: could not find function "lmer."??? I'm wondering of my lme4 package is installed incorrectly.? Can someone tell me the installation procedure?? I looked at the support docs but couldn't translate that into anything that would work.
2012 Apr 18
0
Error in eval when using contrast and nlme
Hi everybody,
I've written a function to run an LME model on data derived from functional magnetic resonance images. When I run the function with contrasts included I get the following error
Error in eval(expr, envir, enclos) : object 'inModelFormula' not found
I think it has something do do with the way contrast evaluates arguments, but I've got no idea how to fix it. The code attached below demonstrates the problem. Could anyone advise on how to fix/eliminate the problem?
------------------------------------------------------------...
2009 Jan 04
1
Problems with Rcmdr and BiodiversityR
Dear all,
I run R 2.7.2 under Windows and integrated BiodiversityR sucessfully into
the R commander. Most functions of BiodiversityR run but others (like
"analysis of species as response") produce blank windows and the message:
Error in get(x, envir = RcmdrEnv(), mode = mode, inherits = FALSE) :
Variable "operatorFont" nicht gefunden
What's wrong?
Best regards, Frieda