Prof Brian Ripley wrote:
Interchange 1 and 2 (see ?apply: Andy was answering the subject line, not
that in the body).
However, Max asked also for column medians of a data frame, for which use
sapply(DF, median)
By the way, what is the preferred code for column-wise calculation on
*all
can anybody help with the following error message:
Error in 1:object$rank : NA/NaN argument
I get it with comparisons of single means in an ANOVA.
Example data below.
Thanks, Steffen
seven subjects participated in each of 6 conditions (intervals).
subject = factor(rep(c(1:7), each = 6))
On Sun, 22 Jan 2006, Philippe Grosjean wrote:
Prof Brian Ripley wrote:
Interchange 1 and 2 (see ?apply: Andy was answering the subject line, not
that in the body).
However, Max asked also for column medians of a data frame, for which use
sapply(DF, median)
By the way, what is the
That solution for the case 'with gaps' merely omits transitions where
the transition information is not for a single time step. (Mine can be
modified for this as well - see below.)
But if you know that a firm went from state i in year y to state j in
year y+3, say, without knowing the
Hello Guys,
I'm using the package RankProduct to determine the differential expression of
genes in 2 classes.
The importance of the thing is to know:
- How can I determine which class is the class of up-regulated
genes and which to the down regulated gene
-
I'm wanting to create a series of near-identical matrices via the addition
of white noise to my starting matrix. Is there a function within R which
will allow me to do this?
Thank you
Laura Quinn
Institute of Atmospheric Science
School of Earth and Environment
University of Leeds
Leeds
LS2 9JT
Dear all,
I'm a new user of R and MNP. Would anybody advise me what I have done wrong
to the input or data. When I add the R7, it said that there is an error
SWP:singular matrix. I can add up to R6 only. Copy of the R console is
attached for your reference.
Thanks.
Andy
mywork.pdf
Dear Andy,
You appear to have 7 observations and 8 explanatory variables in the model.
You'd be in trouble even if this were a linear model fit by least squares.
Moreover, each observation has a different value of the response variable --
that, is the response has 7 levels. Did you really intend
Hi,
I've been interested in testing differences between correlation coefficients
and as a newcomer to R it occured to me building a library to perform such
tests.
However, before enganging on the project I need to know if there are such
library functions already available and if so which they
Is this what you want by adding a random number to the values?
x - matrix(1:9, ncol=3)
x
[,1] [,2] [,3]
[1,]147
[2,]258
[3,]369
x + runif(9, -.1, .1)
[,1] [,2] [,3]
[1,] 0.9577315 3.927673 6.953332
[2,] 2.0530684 5.072495 8.076258
[3,]
On 22-Jan-06 Laura Quinn wrote:
I'm wanting to create a series of near-identical matrices
via the addition of white noise to my starting matrix.
Is there a function within R which will allow me to do this?
Thank you
Laura Quinn
The short ansdwer is: Yes, just do it as you descibe!
For
Hi,
I am trying to maximize a utility function using optim. I have a problem
with optim, since some of the values in the caw, mom, me and btm matrixes in
the code bellow are missing. Is there a handy way just to skip the missing
values in the loop?
g - 5
retp - NULL
object - function (x)
{
Hello R-helpers,
What I have: I am working with vectors not matrice:
#Basic equations
A -c(-20,-9,-2)
x -c(0.17,0.22,0.61)
B - crossprod(A,x)
# R matrix multiplication works with vectors
A%*%x==B# Is true...
Question: If x is unknown and A and B are known, how do I solve for x in R?
Dear R-users,
I set up an experiment where I put up bluebird boxes across an
urbanization gradient. I monitored these boxes and at some point I
pulled a feather from a chick and a friend used spectral properties
(rtot, a continuous var) to index chick health. There is an effect of
sex that I
On 22-Jan-06 Lapointe, Pierre wrote:
Hello R-helpers,
What I have: I am working with vectors not matrice:
#Basic equations
A -c(-20,-9,-2)
x -c(0.17,0.22,0.61)
B - crossprod(A,x)
# R matrix multiplication works with vectors
A%*%x==B # Is true...
Question: If x is unknown and A
If you are now presenting subjects with pairs, have you considered
multidimensional scaling and possibly Bradley-Terry models
extensions? RSiteSearch(multidimensional scaling) and
RSiteSearch(Bradley-Terry) both seemed to contain potentially useful
information.
best
Hi
Waichler, Scott R wrote:
I can't find a way to change just the panel background color in lattice.
I would like NA regions in levelplot() to appear black. I've tried the
trellis.par.set() stuff, but it it makes the background of the whole
graphic black.
Here's an approach using a simple
Hello, I want to do the following: First, generate an R code in a file
from an external program, then send the name of the file to R using
sockets, finally let R to open that file and to execute the R code.
I just wanted to know if there is any function in R that reads a file
an executes the R
source(file.txt)
or even:
source(http://my.server.com/my/r/commands;)
Gabor
On Sun, Jan 22, 2006 at 11:02:05PM +0100, pau carre wrote:
Hello, I want to do the following: First, generate an R code in a file
from an external program, then send the name of the file to R using
sockets, finally
Ajay--you seem to have gotten your question answered regarding putting your
dataframe in the correct format, etc. If you haven't already, you might
want to check out the MSM package for multi-state Markov and hidden Markov
models in continuous time. It's been quite useful for some of my work
I see that Matrix, lme4 and SASmixed in zip format have been 'rolled back' to
the previous versions - which I have now installed. Running
library(SASmixed)
data(Demand)
example(Demand)
gives
Demand fm1Demand - lmer(log(d) ~ log(y) + log(rd) + log(rt) +
log(rs) + (1 | State) + (1
I'm trying to convert a matrix of capture occasions to format that an
external program can read. The job is to basically take a row of
matrix, like
smp[1,]
[1] 1 1 0 1 1 1 0 0 0 0
and convert it to the equivalent string 110111
I'm having problems doing this in a speedy way. The simplest
I've just hit this problem as well and as I am slumming it on XP at the
moment, I don't have the compilation tools to use the .tar.gz version.
I also notice that the numbering format has changed. Is this intentional?
Best wishes
John
John Logsdon Try to make
Hi all,
I am doing a array marginalization over one dimension in the following
manner:
===
for(l in 1:L)
{
flst=list(Pzu, Pzi, array(Puzu[,as.character(r[[l,u]])],
dim=dim(Puzu)[1], dimnames=dimnames(Puzu)[1]),
Hi all,
The previous post had some html formatting and did not go through. So,
here it is again in plain text.
I am doing a array marginalization over one dimension in the following manner:
===
for(l in 1:L)
{
flst=list(Pzu, Pzi,
This is NAs in your own code, not in optim! Please use a truthful
subject.
Consider the use of sum(na.rm=TRUE) rather than your inner loop.
On Sun, 22 Jan 2006, Hannu Kahra wrote:
Hi,
I am trying to maximize a utility function using optim. I have a problem
with optim, since some of the
First, your timings seem slow: even my laptop is using 0.4 secs. So the
simple solution is to use a better computer.
I would just write such things in C. The following runs in 0.01sec on my
machine (timed by looping over it)
system.time(.Call(Cpaste, smp))
using
#include R.h
#include
Søren Højsgaard wrote:
I see that Matrix, lme4 and SASmixed in zip format have been 'rolled back' to
the previous versions - which I have now installed. Running
library(SASmixed)
data(Demand)
example(Demand)
gives
Demand fm1Demand - lmer(log(d) ~ log(y) + log(rd) + log(rt)
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