Displaying 20 results from an estimated 2000 matches similar to: "MASS installation"
2005 Jan 28
3
GLM fitting
DeaR R-useRs,
I'm trying to fit a logist model with these data:
> dati
y x
1 1 37
2 1 35
3 1 33
4 1 40
5 1 45
6 1 41
7 1 42
8 0 20
9 0 21
10 0 25
11 0 27
12 0 29
13 0 18
I use glm(), having this output:
> g<-glm(y~x,family=binomial,data=dati)
Warning messages:
1: Algorithm did not converge in: glm.fit(x = X, y =
Y, weights = weights, start = start, etastart =
2005 Jan 11
3
Kolmogorov-Smirnof test for lognormal distribution with estimated parameters
Hello all,
Would somebody be kind enough to show me how to do a KS test in R for a
lognormal distribution with ESTIMATED parameters. The R function
ks.test()says "the parameters specified must be prespecified and not
estimated from the data" Is there a way to correct this when one uses
estimated data?
Regards,
Kwabena.
--------------------------------------------
Kwabena Adusei-Poku
2004 Oct 30
2
(no subject)
Hi, there.
Does anybody know how to plot a smooth density plot for some data
simulated from certain distribution? Thanks.
Yulei
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
Yulei He
1586 Murfin Ave. Apt 37
Ann Arbor, MI 48105-3135
yuleih at umich.edu
734-647-0305(H)
734-763-0421(O)
734-763-0427(O)
734-764-8263(fax)
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
2005 Jan 13
1
Re:Time-Series
Hi,
you can address to a single ts in a multivariate ts
object by namets[,index]. See this example:
> dati
X Y
1 100 200
2 150 210
3 180 220
4 200 230
5 220 250
> serie<-ts(dati,start=1999)
> serie
Time Series:
Start = 1999
End = 2003
Frequency = 1
X Y
1999 100 200
2000 150 210
2001 180 220
2002 200 230
2003 220 250
> serie[,1] ## first ts
Time Series:
Start =
2005 Jan 25
1
Fitting distribution with R: a contribute
Dear R-useRs,
I've written a contribute (in Italian language)
concering fitting distribution with R. I believe it
could be usefull for someones. It's available on CRAN
web-site:
http://cran.r-project.org/doc/contrib/Ricci-distribuzioni.pdf
Here's the abstract:
This paper deals with distribution fitting using R
environment for statistical computing. It treats
briefly some
2005 Jan 25
1
spearman rank test correlation
Hallo,
does anybody know if there is an implementation of the Spearman rank
correlation in R that gives a correct (or at least 'safe') p-value in
the case of ties??
I have browsed the R-help archives but I found nothing.
Thanks a lot in advance for any help,
Antonino Casile
2004 Dec 09
1
How can I estimate parameters of probability distributions?
Hi list,
I have a group of data. It looks like they follow a exponential
distribution. In R, how can I esimate lamda, that is the rate in pexp,
of the distribution and can I use Kolmogorov-Smirnov for hypothesis
testing in such a situation? I have read the "8.2 Examing the
distribution of a set of data" of "An Introduction to R" but I did not
find any clues on this issue.
2005 Jan 28
2
Begginer with R
Hello all,
Im just beggining using R. I have read a couple of introductory documents
but they are very general. Is there a document focused on classification?
(this is what Ill be using R for). Examples would be just fine.
Thanks in advance,
Ulises
2005 Feb 03
1
nonparametric manova
Dear colleagues,
has anyone an idea how to carry out a nonparametric manova for comparing
3 groups?
Thank you for your help.
Vera
2005 Feb 23
1
nonlinear least square fit of an unknown function
Hi, I have a set of twelve points and wonder how I can
get a function that can then be used to calculate the
area under the curve (most important). Thanks.
Eric
2005 Feb 22
1
Does R has the function for garch-t, gjr-garch, qgarch and egarch
Dear all,
I would like to know that R has the function for garch-t,gjr-
garch,qgarch and egarch.
Best Regards,
Luck
2005 Feb 22
2
estimate the parameter of exponential distribution, etc.
Given a numeric vector of observations, does R have any generic way to estimate the parameters of commonly used distributions (exponential, gamma, etc.) without numerically optimizing the likelihood function?
Thanks,
David
_______________________________________
David R. Bickel http://davidbickel.com
Research Scientist
Pioneer Hi-Bred International
Bioinformatics & Exploratory Research
7250
2005 Jan 17
3
Skewness test
Hi,
is there a test for the H0 skewness=0 (or with skewness as test
statistic and normality as H0) implemented in R?
Thank you,
Christian
***********************************************************************
Christian Hennig
Fachbereich Mathematik-SPST/ZMS, Universitaet Hamburg
hennig at math.uni-hamburg.de, http://www.math.uni-hamburg.de/home/hennig/
2005 Jul 08
1
Orthogonal regression
Dear R-Users,
is there any statement to fit a orthogonal regression
in R environment?
Many thanks in advance.
Best regards,
Vito
Diventare costruttori di soluzioni
Became solutions' constructors
"The business of the statistician is to catalyze
the scientific learning process."
George E. P. Box
"Statistical thinking will one day be as necessary for efficient
2005 Jan 13
2
multivariate diagnostics
Hi, there.
I have two questions about the diagnostics in multivarite statistics.
1. Is there any diagnostics tool to check if a multivariate sample is from
multivariate normal distribution? If there is one, is there any function
doing it in R?
2. Is there any function of testing if two multivariate distribution are
same, i.e. the multivariate extension of Kolomogrov-Smirnov test?
Thanks for
2005 Jul 28
2
Cochran-Armitage-trend-test
Hi!
I am searching for the Cochran-Armitage-trend-test. Is it included in an
R-package?
Thank you!
--
2005 Nov 17
1
Fitdistr()
When using fitdistr() with the exponential, log-normal and beta distributions,
you get the relevent rate, mean, standard deviation, shape1 and shape2 but
you get a number bellow those that are in () and I was wandering what exactly
those numbers represent and how they relate to the data.
Many thanks
Mark Miller
2005 Jul 19
2
data mining
Dear all,
I'm looking for some material on data mining with R. I have something
from Luis Torgo but I'd like to see something else.
If anybody could help me I'll be thankful
Adri??n
2005 Jul 28
1
stl()
Hello, anyone got an idea on how to use stl() so that the remainder eventually
becomes white noise? i used stl repeatedly but there is autocorrelation in
the remainder that i can't get rid of.
os: linux suse9.3
------------------------------------------------
Sebastian Leuzinger
Institute of Botany, University of Basel
Sch??nbeinstr. 6 CH-4056 Basel
ph 0041 (0) 61 2673511
fax 0041 (0)
2005 Jul 29
1
R: non parametric regression/kernels
hi all
i have a another stats question.
i would like to solve the following question:
y(i)=a+b*x(i)+e(i)
i.e. estimate a and b (they should be fixed) but i dont want to specify
the standard density to the straight line.
this can be done using kernel regression. the fitted line is however
fitted locally. does anyone have a reference that will help me with my
problem.
i am still new to