Displaying 20 results from an estimated 500 matches similar to: "R help for a newby"
2010 Nov 29
1
Troubles in plotting to a postscript file (not to png)
Dear R users,
I am trying to produce some plots in a postscript file, but I am
experiencing some issues. I open the device with
-----------------------------
setPS()
postscript (file='gs_mcmc_dust.ps',width=5*3,height=5*3,horizontal =
FALSE, paper = "special",family =
"ComputerModern",encoding="TeXtext.enc")#, onefile = FALSE
-----------------------------
2012 Jun 04
2
paquete SPEI función thornthwaite
Hola eRReros.
Os lo explico con un ejemplo:
# Cargamos los paquetes y el ejemplo
install.packages("SPEI")
library("SPEI")
data(wichita)
# los primeros 12 datos
head(wichita,12)
# mi subset de los primeros 12 datos
meu<-wichita[c(1:12),]
meu
# como veis los valores de TMED son iguales en ambos dataframes.
# ahora viene el problema
# calculamos
2004 Oct 29
1
as.list.matrix
I found the need of converting a matrix into a list of its columns
(for use with do.call), and was surprised there was no method
as.list.matrix, it could easily be a part of as.list default
I wrote
my.as.list.matrix <- function(mat) {
if(!is.matrix(mat))stop("Argument must be a matrix")
n <- NCOL(mat)
res <- vector(mode="list", length=n)
2015 Mar 03
2
openssh-SNAP-20150304 issues
Script started on Tue Mar 3 07:35:34 2015
doctor.nl2k.ab.ca//usr/source/openssh-SNAP-20150304$ make tests
[ -d `pwd`/regress ] || mkdir -p `pwd`/regress
[ -d `pwd`/regress/unittests ] || mkdir -p `pwd`/regress/unittests
[ -d `pwd`/regress/unittests/test_helper ] || mkdir -p `pwd`/regress/unittests/test_helper
[ -d `pwd`/regress/unittests/sshbuf ] || mkdir -p `pwd`/regress/unittests/sshbuf
[ -d
2015 May 14
3
comportamiento de data.table al hacer calculos por grupos
Estimada comunidad tengo un problema del que no encuentro datos que me
ayuden mucho en la web.
Estoy haciendo calculos por grupos con data,table. Tengo un archivo
(zp.res) con tres columnas que clasifican los datos (sol, con, dia) y
una columna de datos numericos (media), de la siguiente forma:
sol con dia media
1: con 0 1 -22.6
2: con 0 1 -36.6
3: con 0 1 -35.6
y
2012 Feb 13
1
multi-regression with more than 50 independent variables
Hi R Users,
I am going to run a multiple linear regression with around 57 independent
variables. Each time I run the model with just 11 variables, the results
are reasonable. With increasing the number of independent variables more
than 11, the coefficients will get ?NA? in the output. Is there any
limitation for the number of independent variables in multiple linear
regressions in R? I attached
2012 Jul 06
4
differences between survival models between STATA and R
Dear Community,
I have been using two types of survival programs to analyse a data set.
The first one is an R function called aftreg. The second one an STATA
function called streg.
Both of them include the same analyisis with a weibull distribution. Yet,
results are very different.
Shouldn't the results be the same?
Kind regards,
J
--
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2010 Jun 01
5
Help barplots
Dear All,
I am newbie to R, and I wanted to plot a barplots with R and in such a way
that It will also show me position which I can plot on the bar line.
Here is my code that I am using to plot,
> chromosome <- c(40.2, 35.6, 36.1, 29.6, 31, 29.6, 31, 29.4, 28.2, 23, 23,
28.2)
>barplot (chromosome, col="purple", xlab="Oryza sativa Chromosomes", border
= NA, space =
2011 Oct 20
1
Applying function with separate dataframe (calibration file) supplying some inputs
Hello,
I am not entirely sure the subject line captures what I am trying to do, but
hopefully this description of the problem will help folks to see my
challenge and hopefully offer constructive assistance.
I have an experimental setup where I measure the decrease in oxygen in small
vials as an organism, such as an oyster, consumes the oxygen. Each vial is
calibrated before the experiment and
2009 Oct 19
2
how to get rid of 2 for-loops and optimize runtime
Short: get rid of the loops I use and optimize runtime
Dear all,
I want to calculate for each row the amount of the month ago. I use a matrix with 2100 rows and 22 colums (which is still a very small matrix. nrows of other matrixes can easily be more then 100000)
Table before
Year month quarter yearmonth Service ... Amount
2009 9 Q3 092009 A ...
2006 May 23
11
New "made with Rails" site launched: www.invitika.com
We''ve finally finished up work on our application and are now beginning
our beta. The site (SMS+mobile blogging+event planning+LBS+photos) is
built using 100% Ruby on Rails. Many thanks to all the people who
answered questions over the months on this list. Our experience with
Rails was overwhelmingly positive!
We''d love to hear any feedback you might have:
2011 Nov 15
1
Remove thw data from the dataframe
Hi,
I want to remove the entire row from the dataset if any of the row contains
blank or NA
my dataset look like
State Year Y X2 X3 X4 X5 X6
State1 1960 27.8 397.5 42.2 50.7 78.3 65.8
State2 1960 29.9 413.3 38.1 52 79.2 66.9
State1 1961 29.8 439.2 40.3 54 79.2 67.8
State2 1961 30.8 459.7 39.5 79.2 69.6
State1 1962 31.2 492.9 37.3 54.7 77.4 68.7
State2 1962 528.6 38.1 80.2 73.6
State1 1963
2008 Jul 16
7
Please help: domU becomes unresponsive
Hi all, sorry to intrude on xen-devel, but I think I need direction
from the expertise here. I''ve admin''d Xen servers of various flavors
for a couple years, but never seen this before. After a period ranging
from several hours to several days, my primary database and
development DomU completely locks up. Net disconnects, but CPU(sec)
continues to tick in xentop. No errors, and
2009 Jun 22
2
URI::InvalidURIError with open-uri and Google Maps
Hello,
I''m getting an URI::InvalidURIError in my controller when I use german
characters in the uri. Google accepts them but open-uri not. How to
encode them?
That''s my controller simplified:
def index
require ''open-uri''
address = "Bürgerstraße+68+01127+Dresden"
api_key = "my api key"
json =
2007 Aug 16
3
Urgent Help needed
Dear All:
Urgent help is needed.
I have a data set in matrix format of three columns: X, Y and index of four groups (1,2,3,4). What I need to do is the following;
1- How I can subtract the sample mean of each group indexed 1,2,3,4 from the
corresponding data values of this group and create new columns say X-sample mean
and Y-sample mean? I tried to use the "tapply" but
2003 Dec 05
1
Can anyone help me reproduce this SAS Mixed output??
I asked this before and I am going to try again in more applied terms. I
am trying to use R to extract variance components for a two-factor random
effects model with both factors crossed. It would also be nice to
generate some confidence intervals as well. For example, a data set
using SAS Proc Mixed is below followed by the four variance component
estimates and the respective confidence
2009 Jul 09
1
merge performace degradation in 2.9.1
I have noticed a significant performance degradation using merge in 2.9.1
relative to 2.8.1. Here is what I observed:
N <- 100000
X <- data.frame(group=rep(12:1, each=N), mon=rep(rev(month.abb), each=N))
X$mon <- as.character(X$mon)
Y <- data.frame(mon=month.abb, letter=letters[1:12])
Y$mon <- as.character(Y$mon)
Z <- cbind(Y, group=1:12)
system.time(Out
2006 Jun 04
1
logistic regression enquiry
I am hoping for some advie regarding the following scenario.
I have data from 26 studies that I wanted to analyse using logistic
regression. Given the data was from studies and not individuals I was
unsure how I would perform this in R. When analysed in SPSS, weighting was
used so that each study was included twice. Where "use" occurred, a value
of 1 was assigned and was weighted
2006 Jun 06
2
Error in inherits(x, "data.frame") : object "Dataset" not found
I have been trying to run a logistic regression using a number of studies.
Below is the syntax, error message & data.
Any advice regarding what I am doing wrong or solutions are appreciated,
regards
Bob Green
> logreg <- read.csv("c:\\logregtest.csv",header=T)
> attach(logreg)
> names(logreg)
[1] "medyear" "where" "who"
2010 Oct 29
1
Tukey post hoc comparison (glht?) after 3factorial mixed model (lmer)
Hello, dear R-community.
This is a question about TukeyHSD between factor combinations of a Three-Way
ANOVA, which is - since it is a multi measure ANOVA - not a simple ANOVA but
a Generalised Linear Mixed Model (GLMM), calculated with "lmer".
> growth <-
groupedData(length~meas|box_id,outer=~spec*comp*water,data=all.spec)
> model <-