Displaying 20 results from an estimated 2000 matches similar to: "lme code help"
2010 Jun 02
1
lattice, xyplot, using "panel.segments" by just addressing one panel
Hi R experts,
I'm using the xyplot function in lattice to draw a multipanel plot consiting
of 5x6 scatterplots.
Now I need to link single points in each of those scatterplots (=panel),but
the points, that need linking are different for each panel.
I tried to use the panel.segments function for that, but I can't address
each panel separately. Links right for panel 1, show up in all other
2006 Jun 14
1
matrix log
Dear R users,
Has anyone implemented a "matrix log" function in R similar to the
function logm() in Matlab? I did a quick R site search and browsed the
contributed packages to no avail.
The octave function is far too simplistic and fails for the Matlab test
matrix. Ideally, the code of Cheng, Higham, and Laub (2001) or something
similar could be utilized. Just checking before I
2013 Oct 11
9
[PATCH OSSTEST 0/6] Support for serial logs from marilith boxes
The marilith boxes use a conserver (http://www.conserver.com/) setup for
serial access. Our installation exports the logs via http allowing us to
grab them with wget.
Sending debug keys with is handled separately via xenuse. xenuse
ultimately speaks to the conserver too but it abstracts away the IP and
port to use so this is preferred.
With these changes the correct Serial hostprop for a
2006 Sep 12
4
variables in object names
Is there any way to put an argument into an object name. For example,
say I have 5 objects, model1, model2, model3, model4 and model5.
I would like to make a vector of the r.squares from each model by code
such as this:
rsq <- summary(model1)$r.squared
for(i in 2:5){
rsq <- c(rsq, summary(model%i%)$r.squared)
}
So I assign the first value to rsq then cycle through models 2 through
2009 Mar 09
1
lme anova() and model simplification
I am running an lme model with the main effects of four fixed variables (3
continuous and one categorical – see below) and one random variable. The
data describe the densities of a mite species – awsm – in relation to four
variables: adh31 (temperature related), apsm (another plant feeding mite)
awpm (a predatory mite), and orien (sampling location within plant – north
or south).
I have read
2011 Apr 14
1
mixed model random interaction term log likelihood ratio test
Hello,
I am using the following model
model1=lmer(PairFrequency~MatingPair+(1|DrugPair)+(1|DrugPair:MatingPair),
data=MateChoice, REML=F)
1. After reading around through the R help, I have learned that the above
code is the right way to analyze a mixed model with the MatingPair as the
fixed effect, DrugPair as the random effect and the interaction between
these two as the random effect as well.
2005 Jul 15
1
nlme and spatially correlated errors
Dear R users,
I am using lme and nlme to account for spatially correlated errors as
random effects. My basic question is about being able to correct F, p, R2
and parameters of models that do not take into account the nature of such
errors using gls, glm or nlm and replace them for new F, p, R2 and
parameters using lme and nlme as random effects.
I am studying distribution patterns of 50 tree
2012 Nov 08
2
Comparing nonlinear, non-nested models
Dear R users,
Could somebody please help me to find a way of comparing nonlinear, non-nested
models in R, where the number of parameters is not necessarily different? Here
is a sample (growth rates, y, as a function of internal substrate
concentration, x):
x <- c(0.52, 1.21, 1.45, 1.64, 1.89, 2.14, 2.47, 3.20, 4.47, 5.31, 6.48)
y <- c(0.00, 0.35, 0.41, 0.49, 0.58, 0.61, 0.71, 0.83, 0.98,
2010 Sep 29
1
Understanding linear contrasts in Anova using R
#I am trying to understand how R fits models for contrasts in a
#simple one-way anova. This is an example, I am not stupid enough to want
#to simultaneously apply all of these contrasts to real data. With a few
#exceptions, the tests that I would compute by hand (or by other software)
#will give the same t or F statistics. It is the contrast estimates that
R produces
#that I can't seem to
2005 Mar 01
3
packages masking other objects
hello all,
I am trying to use the function getCovariateFormula(nlme) in conjunction with the library lme4. When I load both packages I get the following message and the getCovariateFormula function no longer works:
library(nlme)
library(lme4)
Attaching package 'lme4':
The following object(s) are masked from package:nlme :
contr.SAS getCovariateFormula
2010 Feb 09
1
Missing interaction effect in binomial GLMM with lmer
Dear all,
I was wondering if anyone could help solve a problem of a missing interaction effect!!
I carried out a 2 x 2 factorial experiment to see if eggs from 2 different locations (Origin = 1 or 2) had different hatching success under 2 different incubation schedules (Treat = 1 or 2). Six eggs were taken from 10 females (random = Female) at each location and split between the treatments,
2009 Mar 31
1
using "substitute" inside a legend
Hello list,
I have a linear regression:
mylm = lm(y~x-1)
I've been reading old mail postings as well as the plotmath demo and I came
up with a way to print an equation resulting from a linear regression:
model = substitute(list("y"==slope%*%"x", R^2==rsq),
list(slope=round(mylm$coefficients[[1]],2),rsq=round(summary(mylm)$adj.r.squared,
2)))
I have four models and I
2010 Oct 03
5
How to iterate through different arguments?
If I have a model line = lm(y~x1) and I want to use a for loop to change the
number of explanatory variables, how would I do this?
So for example I want to store the model objects in a list.
model1 = lm(y~x1)
model2 = lm(y~x1+x2)
model3 = lm(y~x1+x2+x3)
model4 = lm(y~x1+x2+x3+x4)
model5 = lm(y~x1+x2+x3+x4+x5)...
model10.
model_function = function(x){
for(i in 1:x) {
}
If x =1, then the list
2008 Nov 25
4
glm or transformation of the response?
Dear all,
For an introductory course on glm?s I would like to create an example to show the difference between
glm and transformation of the response. For this, I tried to create a dataset where the variance
increases with the mean (as is the case in many ecological datasets):
poissondata=data.frame(
response=rpois(40,1:40),
explanatory=1:40)
attach(poissondata)
However, I have run into
2011 Nov 25
1
Multiple selection, renaming and saving the results
Dear all,
I have a
big data frame:
str(data1)
'data.frame': 18272 obs. of 11 variables:
$ tag :
int 100001 100002 100003 100005 100007
100008 100009 100011 100012 100014 ...
$ sp :
Factor w/ 18 levels "acassp","acocar",..: 13 5 7 14 14 18 3
11 13 10 ...
$ gx :
num 20 10 35 68 88 63 123 115 137 136
...
$ gy :
num 30 25 24 1 10 40 45 25 23 45 ...
2002 Jun 20
2
scatterplot3d
Hello,
I am trying to replicate example 4 in the package 'scatterplot3d':
s3d.dat_data.frame(cols=as.vector(col(my.model4)),
rows=as.vector(row(my.model4)),
value=as.vector(my.model4))
scatterplot3d(s3d.dat, type="h", lwd=5, pch=" ",
x.ticklabs=colnames(my.model4), y.ticklabs=rownames(my.model4),
main="Conditional probabilities, Model 3")
Nice! but,
2009 Dec 10
1
updating arguments of formulae
Dear R-Community,
I am relatively new with R, so sorry for things which for you might be
obvious...
I am trying to automatically update lmer formulae.
the variables of the model are:
depM= my dependent measure
Sb2= a random factor
OS = a predictor
VR= another predictor
So, I am building the first model with random intercept only:
model = lmer(depM ~ (1 |Sb2))
then I update the formula
2010 Mar 28
1
keeping track of who did what
hello everybody.
i need to log "who did what" on some models. i was reading recipe 59
of rails recipes and i created something like that:
class LogSweeper < ActionController::Caching::Sweeper
observe :model1, :model2, :model3, :model4, :model5, ...
after_save(model)
save_log(model, "save")
end
after_destroy(model)
save_log(model, "destroy)
end
2013 Nov 30
7
[xen-unstable test] 22184: regressions - trouble: broken/fail/pass
flight 22184 xen-unstable real [real]
http://www.chiark.greenend.org.uk/~xensrcts/logs/22184/
Regressions :-(
Tests which did not succeed and are blocking,
including tests which could not be run:
test-amd64-amd64-xl-qemuu-winxpsp3 7 windows-install fail REGR. vs. 22106
test-amd64-i386-xl-win7-amd64 9 guest-localmigrate fail REGR. vs. 22106
Regressions which are regarded as
2011 Sep 28
2
GAMs in R : How to put the new data into the model?
I have 5 GAMs ( model1, model2, model3, model4 and model5)
Before I use some data X(predictor -January to June data) to form a equation
and calculate the expected value of Y (predictand -January to June). After
variable selection, GAMs (Model 1)were bulit up! R-square :0.40
NOW, I want to use new X'( predictor -July - December data) and put into
Model 1, then get the expected value of Y'