Displaying 20 results from an estimated 2000 matches similar to: "About ade4 and overlaying points"
2005 Aug 08
1
get the wald chi square in binary logistic regression
hello,
I work since a few time on R and i wanted to know how to obtain the Wald chi
square value when you make a binary logistic regression. In fact, i have the z
value and the signification but is there a script to see what is the value of
Wald chi square. You can see my model below,
Best regards,
S??verine Erhel
[Previously saved workspace restored]
> m3 = glm(reponse2 ~ form +
2005 Aug 18
3
help with unknown function
Hello
I am working on radio tracking data, with a short programme someone gave me
and ... which should, supposedly, work ... In this programme, there is the
function : getareahr(kern, levels = 95). But i cannot find any 'getareahr'
in R ...
could anyone help me?
thanks!
Agn??s
2005 Jul 08
2
[OT] "Dispersion" in French
Greetings,
I'm posting this OT query here because of out very international
membership!
In the French sentence
"Les taux de tirage sont calcul??s de mani??re ?? ce que la
dispersion soit inf??rieure ?? 5 % dans chaque strate."
it would seem intended that the "dispersion" is to be calculated
in a specific way (unstated) -- otherwise, how to ensure that it
shall be
2005 Jun 20
2
frequency tables
R-masters,
I have a problem that I have been working on for a while and it seems
that there may be a simple solution that I have yet to figure out, so I
thought that I would venture to post to the help list.
Let's say there was a data.frame with three vectors, two that are
factors identifying the data, and one that holds the frequency of
occurrence (the events are binary, yes or no). I
2005 Jun 22
10
How to read an excel data into R?
Hi all,
Does anybody know the easiest way to import excel data into R? I copied
and pasted the excel data into a txt file, and tried read.table, but R
reported that
Error in read.table("data_support.txt", sep = " ", header = T) :
more columns than column names
Thanks!
Ling
2005 Jul 29
6
Binary outcome with non-absorbing outcome state
I am trying to model data in which subjects are followed through time to
determine if they fall, or do not fall. Some of the subjects fall once,
some fall several times. Follow-up time varies from subject to subject.
I know how to model time to the first fall (e.g. Cox Proportional
Hazards, Kaplan-Meir analyses, etc.) but I am not sure how I can model
the data if I include the data for those
2004 Jan 13
2
Manova for repeated measures
Hi everyone,
I'm posting again, since I haven't got an answer (yet :( ).
According to R help, manova does not support the inclusion of the Error()
term in the formula call. I have repeated measures data for two dependent
variables,
so this means I can't account for subject variance in time?. Any lights?
Thanks in advance,
Rodrigo Abt,
Department of Economic Studies,
SII, Chile.
2004 Apr 27
3
R hang-up using lm
Dear R-helpers,
I have found a slightly annoying problem when trying to
plot lines on graphs. I first created my data using
tapply, thus:-
y1=as.vector(fit1$coef$random$id)
x1=tapply(o1,id,median,na.rm=T)
x2=tapply(o2,id,median,na.rm=T)
#then I plot the data, thus:-
plot(x1[x2==0],y[x2==0])
#if I now try to fit the linear regression, R 'hangs up'
2005 Mar 01
3
Reconstructing Datasets
Hi,
Is it possible to recreate "smoothed" data sets in R, by performing a PCA
and then reconstructing a data set from say the first 2/3 EOFs?
I've had a look in the help pages and don't seem to find anything
relevant.
Thanks in advance,
Laura
Laura Quinn
Institute of Atmospheric Science
School of Earth and Environment
University of Leeds
Leeds
LS2 9JT
tel: +44 113 343 1596
2005 Apr 25
2
residuals in lmer
Does anyone know how to extract residuals in lmer?
Here's the error I get:
>
crop.lme=lmer(response~variety*irrigation*pesticide+(1|rep)+(1|rep:
pesticide)+(1|rep:pesticide:irrigation), crop.data)
> qqnorm(crop.lme)
Error in qqnorm.default(crop.lme) : y is empty or has only NAs
> resid(crop.lme)
NULL
Thanks!
--Jake
2005 Apr 07
2
newline in lattice axis label
Hi,
I have a 3 panel xyplot with different variables in the y axis. I'm trying
to insert a newline after "Width (cm)," in the ylab argument as in the
example below. My goal is to have the y axis label broken into two lines,
split after the string just mentioned.
plotfun <- function() {
fakedf <- data.frame(A = sample(1:100, 50),
B = rnorm(50),
2005 May 03
5
Step wise regression
Dear Fellows,
How can I do to proced a step wise regression in R, if it´s possible ?
Thanks,
Walmir
__________________________________________________________________________
Acabe com aquelas janelinhas que pulam na sua tela.
AntiPop-up UOL - É grátis!
http://antipopup.uol.com.br/
[[alternative HTML version deleted]]
2004 Dec 05
2
String manipulation---mixed case
Hello,
Does anyone know of a "slick" way to get R to convert a string which is all upper case to a string where the first letter in each word is upper case and all others are lower case?
I suspect the solution is to begin by parsing the string, convert the appropriate letters to upper and lower case using "toupper" and "tolower", and then to paste the pieces back
2004 Oct 31
2
Obtaining fitted model information
Dear list,
I am brand new to R and using Dalgaard's (2002) book Introductory Statistics with R (thus, some of my terminology may be incorrect).
I am fitting regression models and I want to use Hurvich and Tsai's AICC statistic to examine my regression models. This penalty can be expressed as: 2*npar * (n/(n-npar-1)).
While you can obtain AIC, BIC, and logLik, I want to impose the AICC
2005 Apr 24
1
large dataset import, aggregation and reshape
Dear useRs
We have a data-set (comma delimited) with 12Millions of rows, and 5
columns (in fact many more, but we need only 4 of them): id, factor 'a'
(5 levels), factor 'b' (15 levels), date-stamp, numeric measurement. We
run R on suse-linux 9.1 with 2GB RAM, (and a 3.5GB swap file).
on average we have 30 obs. per id. We want to aggregate (eg. sum of the
measuresments under
2005 Mar 21
3
Force labelling of x-axis
Hi,
I'm trying to do a box-whisker plot of two columns of a data frame, a
list of category names in one column vs. some numerical values in the
other. The plot itself works fine, but only a few points of the x-axis
( the category names ) are labelled. I think that this is because the
category names are too long.
Is there any way to force R to label each x-axis value, preferably at a
2003 Dec 24
4
coding logic and syntax in R
Hello,
I am a beginner in R programming and recently heard about this mailing list.
Currently, I am trapped into a simple problem for which I just can't find a
solution. I have a huge dataset (~81,000 observations) that has been
analyzed and the final result is in the form of 0 and 1(one column).
I need to write a code to process this column in a little complicated way.
These 81,000
2005 Apr 11
6
How to change letters after space into capital letters
What is the easiest way to change within vector of strings
each letter after a space into a capital letter?
E.g.:
c( "this is an element of the vector of strings", "second element" )
becomes:
c( "This Is An Element Of The Vector Of Strings", "Second Element" )
My reason to try to do this is to get more readable abbreviations.
(A suggestion would be to
2004 Jul 10
6
where does R search when source()?
Exactly where does R search for foo.R if I type source("foo.R")?
Only from current working directory (same as getwd()), from all directories
specified by e.g. $PATH? Thanks.
Daehyok Shin
2004 Jul 10
6
where does R search when source()?
Exactly where does R search for foo.R if I type source("foo.R")?
Only from current working directory (same as getwd()), from all directories
specified by e.g. $PATH? Thanks.
Daehyok Shin