Displaying 6 results from an estimated 6 matches for "indermaur".
2008 Jun 25
1
help_transformation
...el to a response Y. Y shows an s-shaped distribution when using QQ-plots (some zero values and some very high values). hence, which transformation should i apply that Y follows a normal distribution? any r-function/package available to do this?
thanks for any hint,
regards,
lukas
???
Lukas Indermaur, PhD student
eawag / Swiss Federal Institute of Aquatic Science and Technology
ECO - Department of Aquatic Ecology
?berlandstrasse 133
CH-8600 D?bendorf
Switzerland
Phone: +41 (0) 71 220 38 25
Fax : +41 (0) 44 823 53 15
Email: lukas.indermaur at eawag.ch
www.lukasindermaur.ch <http://www...
2007 Feb 27
4
fitting of all possible models
...ay to process them with a batch job:
# e.g. model 1
preference<- formula(Y~Lwd + N + Sex + YY)
# e.g. model 2
preference_heterogeneity<- formula(Y~Ri + Lwd + N + Sex + YY)
etc.
etc.
I appreciate any hint
Cheers
Lukas
???
Lukas Indermaur, PhD student
eawag / Swiss Federal Institute of Aquatic Science and Technology
ECO - Department of Aquatic Ecology
?berlandstrasse 133
CH-8600 D?bendorf
Switzerland
Phone: +41 (0) 71 220 38 25
Fax : +41 (0) 44 823 53 15
Email: lukas.indermaur at eawag.ch
www.lukasindermaur.ch
2007 Feb 20
1
testing slopes
Hello
Instead of testing against 0 i would like to test regression slopes against -1. Any idea if there's an R script (package?) available.
Thanks for any hint.
Cheers
Lukas
???
Lukas Indermaur, PhD student
eawag / Swiss Federal Institute of Aquatic Science and Technology
ECO - Department of Aquatic Ecology
?berlandstrasse 133
CH-8600 D?bendorf
Switzerland
Phone: +41 (0) 71 220 38 25
Fax : +41 (0) 44 823 53 15
Email: lukas.indermaur at eawag.ch
www.lukasindermaur.ch
2007 Jan 11
3
batch job GLM calculations
...AICA[i] <- AIC(ts.model)
}
#Writes results to data file
x = data.frame(
modelnames, n, AICA)
write.table(x, paste(t.url, file="Results.txt"), sep="\t", quote=F)
----------------------------------------END R-CODE-----------------------------------
???
Lukas Indermaur, PhD student
eawag / Swiss Federal Institute of Aquatic Science and Technology
ECO - Department of Aquatic Ecology
?berlandstrasse 133
CH-8600 D?bendorf
Switzerland
Phone: +41 (0) 71 220 38 25
Fax : +41 (0) 44 823 53 15
Email: lukas.indermaur at eawag.ch
www.lukasindermaur.ch
2007 Feb 28
1
bootstrap
...ts (one row per model) are stored in a dataframe called "mydataframe". How can I implement my script simply into a bootstrap and sum up the frequencies of variables of the 10'000 bootstraped results?
I am not so good in R and would appreciate any hint.
Regards
Lukas
???
Lukas Indermaur, PhD student
eawag / Swiss Federal Institute of Aquatic Science and Technology
ECO - Department of Aquatic Ecology
?berlandstrasse 133
CH-8600 D?bendorf
Switzerland
Phone: +41 (0) 71 220 38 25
Fax : +41 (0) 44 823 53 15
Email: lukas.indermaur at eawag.ch
www.lukasindermaur.ch
2006 Dec 01
1
mixed effects model and r-squared
...EX+ YY, data = t.data, random = ~ 1 | ANIMAL, correlation=corCAR1(0.2, form = ~1 | ANIMAL ), method='ML', na.action=na.omit)).
Is there a possability to easly compute an R-square from the output of the model summary?
I would appreciate any hint.
Best regards
Lukas
???
Lukas Indermaur, PhD student
eawag / Swiss Federal Institute of Aquatic Science and Technology
ECO - Department of Aquatic Ecology
?berlandstrasse 133
CH-8600 D?bendorf
Switzerland
Phone: +41 (0) 71 220 38 25
Fax : +41 (0) 44 823 53 15
Email: lukas.indermaur at eawag.ch
www.lukasindermaur.ch