Displaying 8 results from an estimated 8 matches for "fitmodels".
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fitmodel
2002 May 17
0
options()$warn==2 and try()
...os solaris2.7
system sparc, solaris2.7
status
major 1
minor 5.0
year 2002
month 04
day 29
language R
I have a function called FitModels(), which simply takes in the
names of a data.frame and two variable names within that data.frame, and
fits and returns a list of objects from 2 coxph() fits, one main effects and
one interaction model. Sometimes the two variables are such that there is a
warning message: convergence has not been r...
2010 Sep 19
2
working with eval and environments
I'm trying to get the following section of code to work, I think the problem
is being caused by the assignment of data to the lm function not evaluating
to "train" in the parent environment but I can't seem to figure out how to
do this.
fitmodel <- function(trial,data)
{
wrap.lm <- function(formula,data,...) { cat("in wrap lm",NROW(data),"\n");
2010 Oct 24
3
Long model formulae
What is a good way to enter a very long model formula. For example:
y ~ Input.2 + Input.3 + ... + Input.1000
(assuming the corresponding dataframe has many other columns).
Is there a way to convert a character string to a formula? Are there command line expansions in R besides the simple '.'?
Thanks.
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2012 Feb 01
1
Simulation confidence interval
The follwing is a code snippet from a power simulation
program that I'm using:
?
estbeta<-fixef(fitmodel)
?sdebeta<-sqrt(diag(vcov(fitmodel)))
? for(l in 1:betasize)
? {?
?? cibeta<-estbeta[l]-sgnbeta[l]*z1score*sdebeta[l]
??? if(beta[l]*cibeta>0)????????????? powaprox[[l]]<-powaprox[[l]]+1
????? sdepower[l,iter]<-as.numeric(sdebeta[l])
? }
?
Estbeta recovers the fixed
2012 Jan 04
1
Is there a way to update a method on an existing Reference Class object?
Hi
Being able to do object oriented programming in R is really good. I
now started using the Reference Classes and really like it.
Though, I have one problem: I cannot find a way to update a method on
an existing object.
The flexibility that scripting gives (really needed for interactive
data analysis) is lost if everything have to be recalculated all the
time.
For example I would normally
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.?
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.
2002 May 17
1
Re: [R] options()$warn==2 and try() (PR#1570)
>
> I have a function called FitModels(), which simply takes in the
> names of a data.frame and two variable names within that data.frame, and
> fits and returns a list of objects from 2 coxph() fits, one main effects and
> one interaction model. Sometimes the two variables are such that there is a
> warning message: conver...