Displaying 20 results from an estimated 1000 matches similar to: "help"
2011 Aug 31
2
reading data from multiple files with multiple headers
Dear All,
I have many files with a lot of headers and text at the beginning of the file. The headers are not uniform though and they contain different sizes Is there a way where I can read a table and skip all of the headers/text on top of it until I encounter a certain text pattern? Here is an example. I just want to read the table after the ~A.
~Version Information
?VERS.?????????????
2012 Jul 05
2
vector entry in matix
hi,
i'm trying to figure out if there's any possibility to write a whole vector
into a matrix or data.frame or something like that. i don't mean
transormation. Here an example:
[,1] [,2]
[1,] "a" "d"
[2,] "b" "e"
[3,] "c" "f"
where e.g. a is a<-c(0,1) vector of length 2, b a vector of length 4,... (i
know that
2006 Dec 17
2
question
Dear R users,
I'am using marray and Limma packages to analyze genepix output.
1) how can I filter bad spots from my data (data contains 3 types of bad
spots).
my experiment contains 12 samples and the bad spot are not associated to the
same probes
2) how can I remove control probes from my data ?
I'm sorry, i'm new with R and I can't find answer in packages doc.
best regards,
2008 May 10
3
Creating Matrix
Hello,
I have two data.
x<-c(1, 2, 1, 3, 2)
y<-c(3, 1, 2, 3, 5)
1. How do i create matrix from this two.
what i want is this
x y
1 1 3
2 2 1
3 1 2
4 3 3
5 2 5
2. what is the best way to use chisq.test to get the p.value
thanks
Claire
--
View this message in context: http://www.nabble.com/Creating-Matrix-tp17168173p17168173.html
Sent from the R help mailing list
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 Jan 20
2
Johnson transformation
Hello,
I'm Carla, an italian student, I'm looking for a package to transform non normal data to normality. I tried to use Box Cox, but it's not ok. There is a package to use Johnson families' transormation? Can you give me any suggestions to find free software as R that use this trasform?
Thank yuo very much
Carla
____________________________________________________________
6X
2007 Jan 20
1
aov y lme
Dear R user,
I am trying to reproduce the results in Montgomery D.C (2001, chap 13,
example 13-1).
Briefly, there are three suppliers, four batches nested within suppliers
and three determinations of purity (response variable) on each batch. It is
a two stage nested design, where suppliers are fixed and batches are random.
y_ijk=mu+tau_i+beta_j(nested in tau_i)+epsilon_ijk
Here are the
2006 Mar 15
2
difftime arguments
Hi
I just started using RGui.exe under widnows.
I have a text file containing date arranged in columns and rows, each column has the same format, each row with different formats. 3 of the columns are something like this 1/12/2006 3:59:45 PM
I need to calculate the different in seconds between 2 selected periods using their row’s index
My solution:
Read the file in a data frame and
2005 Jan 17
1
merge data frames taking mean/mode of multiple macthes
Hello :)
I have two data frames, one has properties taken on a
piece by piece basis and the other has performance on
a lot by lot basis. I wish to combine these two data
frames but the problem is that each lot has multiple
pieces and hence i need to take a mean of the
properties of multiple pieces and match it to the row
having data about the lot.
I was wondering if there is a simple commmand,
2006 Sep 25
1
apply: new behaviour for factors in R-2.4.0
Dear R-core
There is a different output for the apply function due to the
change of unlist as mentioned in the R news.
Newly, applying as.factor() (or factor()) in
str(dat <- data.frame(x = 1:10, f1 = gl(2,5,labels = c("A", "B"))))
(d1 <- apply(dat,2,as.factor))
newly returns a character matrix while in R-2.3.1 the same
command resulted in an integer matrix that was
2007 Jun 19
2
Preconditions for a variance analysis
Hello everbody,
i'm currently using the anova()-test for a small data.frame of 40
rows and 2 columns. It works well, but is there any preconditions for
a valid variance analysis, that i should consider?
Thank you for your answer,
Daniel
2003 Jan 16
2
No access to root-level of shares on NT4 SP6 with Samba 2.2.2 on FBSD-4.7
Hi all,
I've got a strange problem with my German NT4 SP6 and my FreebSD-4.7
Samba 2.2.2 server running as a PDC. I connect to several shares on the
Samba-machine by linking them to drive letters. I can browse them but I
can not copy anything to the root-level of the share, neither
directories nor files. The error message is on the NT4-box is:
BLA kann nicht kopiert werden: Der Zugriff wurde
2006 Apr 25
1
summary.lme: argument "adjustSigma"
Dear R-list
I have a question concerning the argument "adjustSigma" in the
function "lme" of the package "nlme".
The help page says:
"the residual standard error is multiplied by sqrt(nobs/(nobs -
npar)), converting it to a REML-like estimate."
Having a look into the code I found:
stdFixed <- sqrt(diag(as.matrix(object$varFix)))
if (object$method
2005 May 15
3
adjusted p-values with TukeyHSD?
hi list,
i have to ask you again, having tried and searched for several days...
i want to do a TukeyHSD after an Anova, and want to get the adjusted
p-values after the Tukey Correction.
i found the p.adjust function, but it can only correct for "holm",
"hochberg", bonferroni", but not "Tukey".
Is it not possbile to get adjusted p-values after
2005 Oct 05
2
problem in installing a package
I'm using R in Windows XP. I created a package myself.
I've used R CMD check to check it. Everything seems OK
except the latex. I get the error message:
* checking bbHist-manual.tex ... ERROR
LaTeX errors when creating DVI version.
This typically indicates Rd problems.
I ignored it because I didn't want to submit it to
CRAN.
Then I tried to use R CMD INSTALL to install it. First
I
2005 Aug 02
1
plotting 3 functions on same graph
hi all,
I wish to draw on the same graphic device 3 functions.
But i don't want them to be on different graph, i want to compare them on the same
I don't need mfrow or mfcol, I need something else...
1 graph on 1 device inside this graph 3 ploted function.
I saw something unsing data.frame, but i think it's overkill, and something less complicated must exist, if not why?
why not
2005 Jan 25
1
r square values for independent variables in multiple linear regr ession model -- newbie
Hello
Could you please suggest a way to find out the r square values for each
independent variable while using "lm" for developing a multiple linear
regression model.
Thank you
avneet
"I have no data yet. It is a capital mistake to theorize before one has
data. Insensibly one begins to twist facts to suit theories instead of
theories to suit facts."
~ Sir Arthur Conan Doyle
2006 Jan 30
2
Type II SS for fixed-effect in mixed model
Hi
In mixed-model with lme()
How can I obtain Type II SS or Type III SS for fixed effect?
Thanks
Julien
2006 Feb 01
1
Randomised Block Design
Hi, I'm studying math, and i have to make an analysys using Randomised
Block Design. I have two factors, i know how to do this in Statistica, but
how to do this in R, i read some manuals but the only thing that i have
found was 2 factor ANOVA.
Please could someone help me, or give some usefull links ??
Krzytsztof Suwada
2006 Feb 20
1
Extracting variance components from lmer
Hi All.
I need a bit of help extracting the residual error variance from the VarCorr
structure from lmer.
#Here's a 2-way random effects model
lmer.1 <- lmer(rating ~ (1|person)+(1|rater), data = dat)
#Get the structure
vc.fit <- VarCorr(lmer.1)
#results in.....
$person
1 x 1 Matrix of class "dpoMatrix"
(Intercept)
(Intercept) 0.7755392
$rater
1 x 1 Matrix