Displaying 20 results from an estimated 2000 matches similar to: "package with roc, sensitivity, specificity, kappa etc"
2007 Apr 05
8
package for Matlab
Hallo,
does a package for Matlab exist in R?
If yes, where can I find it and how can I install it under R?
Thanks, Corinna
2007 Jun 03
2
Subscript in axis label
Dear R help list members,
I am experiencing difficulty in trying to generate a subscript '2' in an
axis label. Although I can get the '2' into a subscript using expression(),
R then forces me to leave at least one space between the '2' and the
following character. My label is supposed to read 'N2O concentration
(ppm)', and the space between the '2' and
2008 Apr 14
1
option(expressions) and --max-ppsize
Dear list,
Is there an exact formula / safe rule of thumb that allows
one to express the value of --max-ppsize as a function of
the value of getOption("expressions") ?
?options tells "If you increase it [the expressions option],
you may also want to start R with a larger protection stack".
Motivation is to determine stack size of a Java vm used
to launch R with a given
2007 May 19
1
(no subject)
Hi friends,
does anyone know how we can 'control' R from Visual Studio .NET? e.g. start R, send a set of commands, save the results and open the results using Visual Studio.
Thanks
Jason
Dr. Iasonas Lamprianou
Department of Education
The University of Manchester
Oxford Road, Manchester M13 9PL, UK
Tel. 0044 161 275 3485
iasonas.lamprianou at manchester.ac.uk
2007 Jun 07
1
new data frame for loop
I have a data frame with three columns, one coded as a factor. I would like
to separate my data out into separate data frames according to the factor
level. Below is a simple example to illustrate. I can get R to return the
data in the correct format but cannot work out how to get separate data
frames. I am a newcommer to programming in R so am not sure what I am
missing! Thanks, Emily
2007 Jun 29
2
cbind
Hi, I have a series of return data, a and b are factors. I would like to
build a matrix which contains each vector of "returns". I am thinking about
something as following, but I guess there should be a sensible way of doing
this.
returns <- split(return, list(regimef, assetf))
cbind(returns[[1]], returns[[2]],...,returns[[n]])
Could anyone give me some advice? Many thanks.
--
2007 Jul 15
1
Complex surveys, properly computed SEs and non-parametric analyses
Can someone direct me to an R function that properly computes standard errors of data obtained from a complex survery design, i.e. perform alnalyses similiar to those that can be performed with SUDAAN, particularly for a non-parametric one-way ANOVA, e.g. signed rank test?
Thanks,
John
John Sorkin M.D., Ph.D.
Chief, Biostatistics and Informatics
Baltimore VA Medical Center GRECC,
University of
2007 Sep 06
1
the survey package
Good afternoon!
I'm trying to use the survey package to get a better point of view for my data, but i need some piece of advice:
i have some data from a survey which has been stratified using 2 criteria: region(7 values), size of locality(5 values) Using the survey pakage how can i define in a correct way this design (taking into account all 4 strata not just one as in the Survey
2007 Jul 28
4
beta regressions in R
Good morning,
Does anyone know of a package or function to do a beta regression?
Thanks,
Walt Paczkowski
_________________________________
Walter R. Paczkowski, Ph.D.
Data Analytics Corp.
44 Hamilton Lane
Plainsboro, NJ 08536
(V) 609-936-8999
(F) 609-936-3733
2007 Jun 28
3
: regular expressions: escaping a dot
What's really the problem with:
> regexpr( '\.odt$', "xxxxYodt", perl=TRUE )
Warning: '\.' is an unrecognized escape in a character string
Warning: unrecognized escape removed from "\.odt$"
[1] 5
attr(,"match.length")
[1] 4
I know that I could use:
> regexpr( '[.]odt$', "xxxxYodt", perl=TRUE )
But it seems to me that
2007 Apr 07
3
string edit distance
I have a column of words, for example
"DOG"
"DOOG"
"GOD"
"GOOD"
"DOOR"
...
and I am interested in creating a matrix that contains the string
edit distances between each pair of words. I am this close -> ' '
<- to writing the algorithm myself (which will allow for different
variations on the string edit rules, indels,
2007 Jun 10
1
R logistic regression - comparison with SPSS
Dear R-list members,
I have been a user of SPSS for a few years and quite new to R. I read
the documentation and tried samples but I have some problems to obtain
results for a logistic regression under R.
The following SPSS script
LOGISTIC REGRESSION vir
/METHOD = FSTEP(LR) d007 d008 d009 d010 d011 d012 d013 d014 d015
d016 d017 d018 d069 d072 d073
/SAVE = PRED COOK SRESID
2007 Jun 29
2
\include-mechanism in Sweave?
Dear HelpeRs,
I'm very fond of Sweave and I use it as often as possible. It'a a pity
I can't use it for larger projects or can I?
For instance suppose I have three files file1.rnw, file2.rnw and
file3.rnw with Sweave code. Working on file2.rnw I whould like to
exclude file1.rnw and file3.rnw temporarily and joining all of them
later. This amounts to a mechanism similar to using
2011 Apr 06
3
ROCR - best sensitivity/specificity tradeoff?
Hi,
My questions concerns the ROCR package and I hope somebody here on the list can help - or point me to some better place.
When evaluating a model's performane, like this:
pred1 <- predict(model, ..., type="response")
pred2 <- prediction(pred1, binary_classifier_vector)
perf <- performance(pred, "sens", "spec")
(Where "prediction" and
2006 Jan 10
1
"Missing value representation in Excel before
I reproduce from memory my exhaustive look into this issue.
RODBC uses the Microsoft ODBC DLL's developed by Microsoft.
These DLL's perform an automatic determination of column type based on the contents of the first N rows of cells in each column, where N [0,16]. N may be set in the Windows system registry, and there are a few other things that may be set in the system registry which
2005 Jan 08
2
translate nroff .d or .sgml files to .rd files
Dear list,
I have some help file for S-Plus 2000 in .d and .sgml format. Is there a
way to translate these files to .Rd files to use in an R package?
Thanks Fredrik Lundgren
2006 Jan 06
1
"Missing value representation in Excel before extraction to R with RODBC"
Dear list,
How should missing values be expressed in Excel before extraction to R
via RODBC. I'm bewildered. Sometimes the representation with NA in Excel
appears to work and shows up in R as <NA> but sometimes the use of NA in
Excel changes the whole vector to NA's. Blank or nothing or NA as
representation for missing values in Excel with dateformat gives NA's of
the whole
2014 Jun 20
2
Como construir una curva ROC
Hola!
Tengo que hacer una curva ROC com unos datos que obtuve de hacer una macro
de excel y aplicar unas reglas, y basicamente tengo que a partir de la
variacion del tiempo y la velocidad del barco obtengo diferentes
porcentajes de true positives (TP) y false positives (FP) y con eso deberia
de construir una curva ROC.
Dada mi ignorância en este tema, no se muy bien por donde empezar , estuve
2007 Apr 20
8
Suggestions for statistical computing course
Dear R-helpers,
I am planning a course on Statistical Computing and Computational
Statistics for the Fall semester, aimed at first year Masters students
in Statistics. Among the topics that I would like to cover are linear
algebra related to least squares calculations, optimization and
root-finding, numerical integration, Monte Carlo methods (possibly
including MCMC), bootstrap, smoothing and
2004 Dec 13
1
random effect in logistisk regression
Dear R-gurus,
Where can I find a simple logistic regression model which can handle
random effects as well among all the R-packages?
With thansk in advance
Fredrik Lundgren
Norrk??ping, Sweden