Displaying 20 results from an estimated 200 matches similar to: "train nnet"
2007 Jul 07
1
calculating p-values of columns in a dataframe
I have a dataframe ("mydf") that contains "differences of means".
I wish to test whether these differences are significantly different from zero.
Below, I calculate the t-statistic for each column.
What is a "good" method to calculate/look-up the p-value for each column?
mydf=data.frame(a=c(1,-22,3,-4),b=c(5,-6,-7,9))
mymean=mean(mydf)
mysd=sd(mydf)
2013 Jun 08
2
Compile error with gfortran-4.6
Dears,
I am writing a code in Fortran using OpenMP directives.
When compiling the code in gfortran 4.4 does not occur any problem.
When compiling the code in gfortran 4.6, an error message appears.
In other compilers the error does not occur.
A small example.
## Code in Fortran
subroutine hello()
implicit none
integer :: nthreads, tid
integer ::
2005 Sep 15
3
means comparison in R (post-hoc test)
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Hi.
I have been using SAS for some time, and now I have discovered R. I am
very happy with it, but I have not found out how to perform some of the
multiple comparisons I was used to do in SAS.
With the SAS/STAT, I generally used the MEANS (for comparison of
arithmetic means) and the LSMEANS (for adjusted means) statements of the
GLM procedure (I
2007 Mar 30
2
Minimum valid number of observations for rpart
Hi,
I wonder if anyone knows a study dealing with the minimum valid number of
observations when using CART?.
On top of that, when using RandomForest, is it possible to obtained a
interpretable tree model as the graphical output of the analysis, just
like in "rpart"?
Thanks a lot in advance
Javier Lozano
Universidad de Le?n
Spain
2006 Feb 10
1
glmmPQL and random effects
Hello R users,
I am trying to run a model with a binary response variable (nesting
success: 0 failure, 1 success) and 8 fixed terms. Nesting success was
examined in 72 cases in 34 territories (TER) during a 6 study years.
Territories are nested within 14 patches (PATCH). I want to run a model
taking into account these nested factors and repeated observation. To do
this, I assume that the best
2011 May 10
1
Reference Classes copy(shallow=FALSE) unexpected behavior.
Dear all,
I''ve just discovered the ''Reference Classes''.
In a previous attempt ---a year ago--- to re-implement in a Object Oriented
fashion the AMORE package using S4 classes I strongly felt the need of such
capability. It''s great to have the Reference Classes now available. Along
with the discovery of the Rcpp package, this new programming paradigm has
boosted
2003 Apr 23
0
MySQL
Dear laurent,
> But there are lots of commands I found in R docs which are "not found",
> such as getTable. Deprecated (I successfully used dbListTables) or do I
> simply miss a package ?
>From RMySQL\NEWS:
* added (almost) trivial convenience RS-DBI functions getTable(),
assignTable(), existsTable(), and removeTable(). They all mimic the
corresponding R/S get(),
2005 Sep 19
1
Use of least-squares means, are they misleading?
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Hi.
Sorry for sending this question twice, but I would really like to know
your opinion on this topic.
I have been reading about the (in)convenience of using least-squares
means (a. k. a. adjusted means) in multiple comparisons (I used to
resort to them when using SAS). I even read a post in this list warning
against them, but not giving much detail.
2011 Feb 07
1
Incremental backup with only delta into a separate file.
Hi All,
I am presently doing a small POC with rsync for incremental backup and
restore starategies.
I have come up with certain question down the line, can anyone help me with
the explanation.
Used the config and ideas from:
http://www.mikerubel.org/computers/rsync_snapshots/
The commands executed on two machines in sequence
Machine 1:
root at Andruil:~# vim testfile
root at Andruil:~# ls
2011 Dec 26
2
Problem of COX model with time dependent covariate
Hi all,
I am trying to detect association between a covariate and a disease outcome using R. This covariate shows time-varying effect, I add a time-covariate interaction item to build Cox model as follows:
COX <- coxph(as.formula("Surv(TIME,outcome)~eGFR_BASE+eGFR_BASE:TIME"),ori.data);
coef exp(coef) e(coef) z p
eGFR_BASE
2006 Jan 18
3
linear contrasts with anova
I have some doubts about the validity of my procedure to estimeate linear contrasts ina a factorial design.
For sake of semplicity, let's imagine a one way ANOVA with three levels. I am interested to test the significance of the difference between the first and third level (called here contrast C1) and between the first and the seconda level (called here contrast C2). I used the following
2005 Dec 16
3
Help with data.frame and lapply
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Hello:
I'm having problems with this line of code:
X.lm <- lapply(names(d), function(x) lm(d["cls"] ~ d[x], data=d))
d[x] is what is giving trouble here, but I don't know exactly how to
solve it. What I'm trying to do is to create a linear model from each
column of the data frame 'd' to apply ANOVA later.
Thanks
2009 Oct 26
1
issue with levels of a factor after subsetting
Hi
Second question in a day, i'm beginnning to feel incompetent...
This time i'm having a weird problem, i'm importing the next data base:
>car<-read.csv2("Historicos.csv")
'data.frame': 1818 obs. of 6 variables:
$ Dpto : Factor w/ 11 levels "ANTIOQUIA","ATL?NTICO",..: 2 2 2 2 2 1
1 1 1 5 ...
$ Rio : Factor w/ 43 levels
2005 Sep 16
0
Problems compiling Hmisc
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Hi.
I am trying to install Hmisc from source on MacOS 10.4.2, using the R
for Mac OS X Aqua GUI 1.12. I have installed g77(using Fink). I am using
the Package installer provided by the GUI, and this is the output I obtain:
* Installing *source* package 'Hmisc' ...
** libs
g77 -fno-common -g -O2 -c cidxcn.f -o cidxcn.o
g77 -fno-common -g
2002 May 06
2
Upgrade to 1.5.0
Hi all!
my apologies if this is too elementary:
I upgraded to 1.5.0. I copied my library folder on version 1.4.1 to the
library folder on 1.5.0. When I try to upload a package via the menu I get
this:
Error in sort(.packages(all.available = TRUE)) :
1 argument passed to "sort" which requires 2.
do I have to copy any other file from the previous version?.
Thanks in
2019 Jun 21
4
Mail migration problem
I?m trying to migrate mdbox to maildir based on https://wiki.dovecot.org/Migration/MailFormat
* Modified dovecot.conf and set mail_location=maildir:/tmp/destination/mailboxes/
* Then I had run
/mnt/testmail/bin/dsync -Dv -u user at domain.com<mailto:user at domain.com> mirror mdbox:/source/mailboxes/user at domain.com<mailto:/source/mailboxes/user at domain.com>
but that
2011 Apr 07
2
Time series of spatial data
Hi guys,
I'm really new in R.
Trying to analyze series of spatial datasets (365 satellite images) in order
to find the best model that fit the data.
Any suggestion which package that could help me?
Thanks in advance.
Cheers
--
View this message in context: http://r.789695.n4.nabble.com/Time-series-of-spatial-data-tp3432979p3432979.html
Sent from the R help mailing list archive at
2011 Aug 25
2
Choropleth in R
Hi all,
I would like to use R in order to generate a Heatmap/Choropleth overlaid on
the UK map. Can someone please help with finding the right package/code? Any
help is much appreciated.
Best, Reza
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2005 Feb 09
3
Corrupted index file
I've recently switched from Courier-imap to dovecot and I'm impressed
with it's speed and reliability. However, my index file gets regularly
corrupted:
Feb 8 21:23:16 hive imap(hart): Corrupted index file
/home/hart/Maildir/.INBOX/.imap.index: index.next_uid (129) >
uid_rec.uid (128)
dovecot version: 0.99.13-3 Debian sid)
I use dovecot in combination with mutt, procmail and
2006 May 11
2
Problem setting locale for voicemail
I've set voicemail almost successfully, only a minor detail remains :-)
I can't get the dates in my local language (spanish). In sip.conf,
zapata.conf and voicemail.conf, I've set:
language=es
and my locale is "es" also. However, the days and months names still
appear in english in the emails!!!
Thursday 11 de May de 2006, 18:49:34.
instead of
Martes 11 de mayo de