Displaying 20 results from an estimated 1000 matches similar to: "Begginer with R"
2005 Jan 31
5
consultation
R people,
I need to know if is possible to make data mining with R. If so, is
there any manual or somewhere/one to consult about that.
Thank you very much
Adri?n
2004 Oct 12
2
Statistical analysis of a large database
Deall all,
We need to perform a statistical analysis of a large database (40,000 entries with approximately 500 fields in each entry) currently handled in Oracle. The data contains categorical variables only.
At the current stage we suggest classification and clustering analysis.
We are planning to perform the analysis in R and would be very grateful for any
2004 Oct 26
3
Importing big plain files from ERP-System/Data Mining with R
Hi,
how can I import really big plain text data files (several GB) from an
ERP-System (SAP-Tables) to R?
The Header of these files are always similar, for example:
Tabelle: T009
Angezeigte Felder: 7 von 7 Feststehende F??hrungsspalten: 2 Listbreite
0250
----------------------------------------------------------------------
|X|MANDT|PERIV|XKALE|XJABH|ANZBP|ANZSP|LTEXT
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 =
2006 Jul 07
6
get_service_ticket: kerberos_kinit_password ULISES$@SYSTEMMASTER.COM.AR@SYSTEMMASTER.COM.AR failed: Preauthentication failed
Hello from Buenos Aires.
I am getting the following error when I do the net ads join command:
get_service_ticket: kerberos_kinit_password ULISES$@SYSTEMMASTER.COM.AR@SYSTEMMASTER.COM.AR failed: Preauthentication failed
I am running Debian, kernel 2.4.18 (geez, I should upgrade).
I searched everywhere for this error but I can?t find any solution.
Wbinfo -u works fine.
kinit
2004 Oct 22
3
Convert a list in a dataframe
Hi,
I've a list containing parameters (intercepts &
coefficients) of 12 regressions fitted
> coeff
[[1]]
(Intercept) anno
-427017.1740 217.0588
[[2]]
(Intercept) anno
-39625.82146 21.78025
.....
[[12]]
(Intercept) anno
257605.0343 -129.7646
I want create a data frame with two columns (intercept
and anno)using data in these list.
Any help
2004 Aug 09
2
Using R "boxplot" function in Excel
Hi, I have downloaded the "R-Com and I was able to run "Interactive Graphics
Demo 2" in excel. However, I couldn't create my own boxplot. Whenever I
tried to run any code, it always say" Error in loading DLL", even
"=rput(A1,A2:A20)". Any idea about what's going wrong? A detailed
explaination about how to use R-Excel tool would be greatly appreciated.
2004 Nov 18
2
Questions about vorbis linking
Hello:
I think that I got a linking problem but I don't know how to fix it.
This is the error code form make:
cc grabando_pcm.o encodear_vorbis.o -o mi_servidor -lasound -lvorbis -logg
encodear_vorbis.o(.text+0x42): En la funci?n `inicializar_vorbis':
: undefined reference to `vorbis_encode_init_vbr'
collect2: ld devolvi? el estado de salida 1
make: *** [mi_servidor] Error 1
2004 Jul 21
2
Testing autocorrelation & heteroskedasticity of residuals in ts
Hi,
I'm dealing with time series. I usually use stl() to
estimate trend, stagionality and residuals. I test for
normality of residuals using shapiro.test(), but I
can't test for autocorrelation and heteroskedasticity.
Is there a way to perform Durbin-Watson test and
Breusch-Pagan test (or other simalar tests) for time
series?
I find dwtest() and bptest() in the package lmtest,
but it
2004 Jul 07
7
Importing an Excel file
Hello, R users,
I am a very beginner of R and tried read.csv to import an excel file after
saving an excel file as csv. But it added alternating rows of fictitious NA
values after row number 16. When I applied read.delim, there were trailing
several commas at the end of each row after row number 16 instead of NA
values. Appreciate your help.
Kyong
[[alternative HTML version deleted]]
2004 Oct 27
2
Skewness and Kurtosis
Hi,
in which R-package I could find skewness and kurtosis
measures for a distribution?
I built some functions:
gamma1<-function(x)
{
m=mean(x)
n=length(x)
s=sqrt(var(x))
m3=sum((x-m)^3)/n
g1=m3/(s^3)
return(g1)
}
skewness<-function(x)
{
m=mean(x)
me=median(x)
s=sqrt(var(x))
sk=(m-me)/s
return(sk)
}
bowley<-function(x)
{
q<-as.vector(quantile(x,prob=c(.25,.50,.75)))
2004 Nov 24
3
T-test syntax question
Hi.
I'd like to do a t-test to compare the Delta values of items with Crit=1
with Delta values of items with Crit=0. What is the t.test syntax?
It should produce a result like this below (I can't get in touch with the
person who originally did this for me)
Welch Two Sample t-test
data: t1$Delta by Crit
t = -3.4105, df = 8.674, p-value = 0.008173 alternative hypothesis: true
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
2010 Oct 16
1
Rmpfr question
Hi:
I'm trying to reproduce an arbitrary precision constant from 'Why and
How to Use Arbitrary Precision' (Ghazi et al., COMPUTING IN SCIENCE &
ENGINEERING May/June 2010;
http://perso.ens-lyon.fr/philippe.theveny/cise.pdf):
d = 173746a + 94228b ? 78487c
where: a = sin(1022), b = log(17.1), and c = exp(0.42).
Ghazi et al. report: d = ?1.341818958e?12 whit IEEE-754 quadruple
2004 Nov 22
1
R: simulation of Gumbel copulas
Hi,
I found this document, but it concerns S+. If it could
interest you'll see:
http://faculty.washington.edu/ezivot/book/QuanCopula.pdf
Cordially
Vito
You wrote:
Dear R:
Is there a function or a reference to simulate Gumbel
copulas, please?
Thanks in advance!
Sincerely,
Erin Hodgess
mailto: hodgess at gator.uhd.edu
R version 2.0.1 windows
=====
Diventare costruttori di soluzioni
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
2004 Aug 12
4
Help with generating data from a 'not quite' Normal distriburtion
I would be very grateful for any help from members of this list for what
might be a simple problem...
We are trying to simulate the behaviour of a clinical measurement in a
series of computer experiments. This is simple enough to do in R if we
assume the measurements to be Gaussian, but their empirical distribution
has a much higher peak at the mean and the distribution has much longer
tails.
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 Nov 18
2
Informix database
We use Informix database. I was able to connect to the database with
S-PLUS by using its CONNECT/Java through the JDBC driver.
How can I connect to Informix with R, wither using JDBC or any other
method? we run Linux so I prefer a method other than ODBC.
Thankx for the help