Displaying 10 results from an estimated 10 matches similar to: "help with means using tail()"
2011 Oct 27
2
creating vector os zeros for simulations (beginner's question)
Dear R helpers,
I know this is a simple task, but I'm new to R and I'm still havind difficulties with the language.
I want to create 30 vectors to be used in a simulation, each with 1 columm and 5 lines, of random numbers N(0,1).
What I tried was this:
N=150
u2<-rep(1:150,0)
u2<-list(matrix(0,5))
u2
for(i in 1:N)
{
u2[i]<-rnorm(5)
}
u2
### also tried this:
N=150
2011 Oct 18
0
how to use VARselect with missing values - beginner's question
Dear R helpers,
I have a ts object, dadosvar, and want to run a VAR.
These are my data:
> dadosvar[1:15,]
dl rp igpm ereal crescpib jurosreal
[1,] 32.31 NA 39.07 419.59 NA 7025.95
[2,] 32.00 NA 40.78 596.57 NA 13401.25
[3,] 32.70 NA 45.71 867.63 NA 7738.64
[4,] 33.22 NA 40.91 1261.36 NA 15669.95
[5,] 33.58 NA 42.58
2010 Oct 05
1
loess with missing data points
Hello List,
I have a longitudinal samples on multiple individuals, for initial analysis,
i am doing some plots to see how the variable changes with the age. In some
of the individuals one or two data points are missing,
IL1Ra Age.at.Sample.Collection Subject.ID
6.575466 2.004106 00709-0
NA 2.162902
2009 Aug 28
1
extracting pvalues from ttest
Hello list,
I have a similar issue as this post
http://tolstoy.newcastle.edu.au/R/e6/help/09/04/11438.html#options2 and I
used the suggestion provided by Jorge with modifications to my data
do.call(c,lapply(your_list_with_the_t_tests,function(x) x$p.value))
but I am getting the following error after excuting the code
B<-by(eo,eo$PlateID, function(.sub) t.test(mcp1~Self_T1D,data=.sub,
2011 Oct 17
2
Beginner's question about plotting variables in a time series object with the date on the x axis
Dear R helpers,
I am a beginner at R so please be gentle :)
I have already read manuals and FAQs, with no help.
I have a monthly time series data on public debt with 40 variables, it starts on January 1994 and ends on June 2011.
I am loading the data into R using read.csv and the data looks ok when I do edit(dados):
> dados<-read.csv("dadosR3.csv", header=T)
then I tried making
2011 May 19
3
A better way to do this
Hello gurus,
I have a dataframe containing two groups viz., 'control' and 'case', each of
these groups contains longitudinal data for 100 subjects. I have to plot all
these subjects on a single chart and then put a regression line for each of
the group for all the subjects. I have written a function to do the chart
grpcharts<-function (dat, group,group2,molecule,cutoff){
2008 Dec 09
1
creating standard curves for ELISA analysis
Hello R guru's
I am a newbie to R, In my research work I usually generate a lot of ELISA
data in form of absorbance values. I ususally use Excel to calculate the
concentrations of unknown, but it is too tedious and manual especially when
I have 100's of files to process. I would appreciate some help in creating
a R script to do this with minimal manual input. s A1-G1 and A2-G2 are
2012 Sep 09
2
Stall on CPU
Hi,
I have been receiving messages on a new DomU''s kern.log. I''ve done a lot
of googling, but haven''t came up with anything very useful, at least not
in a Xen context.
I was wondering if anyone had any suggestions about what could be wrong.
From everything I have read, there should be a stack trace included, but
I am not seeing one.
Thanks in advance,
Ian.
on
2010 Dec 04
4
Make world problem compiling Xen 4.0.1 from source
Greetings, Xen gurus!
Per the Ubuntu community documentation at https://help.ubuntu.com/community/Xen#Maverick%20Notes%20(Xen%204.0.1%20pvops%20on%20Ubuntu%2010.10) I am trying to install Xen 4.0.1 from source which I got from bits.xensource.com/oss-xen/release/4.0.1/xen-4.0.1.tar.gz because apparently the ubuntu-xen-server package has broken dependencies. The instructions as provided state
2008 Dec 26
1
starting values update
Hi all,
does anyone know how to automatically update starting values in R?
I' m fitting multiple nonlinear models and would like to know how I can update starting values without having to type them in.
thank all
--- On Fri, 12/26/08, r-help-request@r-project.org <r-help-request@r-project.org> wrote:
From: r-help-request@r-project.org <r-help-request@r-project.org>
Subject: