Displaying 20 results from an estimated 100 matches similar to: "lm() and factors appending"
2013 Jan 03
20
[PATCH] Switch to poll in xenconsoled's io loop.
The original implementation utilies select(). In Linux select() typically
supports up to 1024 file descriptors. This can be a problem when user tries to
boot up many guests. Switching to poll() has minimum impact on existing code
and has better scalibility.
Up to 8192 file descriptors are supported in the current implementation.
Signed-off-by: Wei Liu <wei.liu2@citrix.com>
---
2005 Aug 30
4
Re: [Xen-changelog] New console transport and update xenconsoled.
Xen patchbot -unstable wrote:
># HG changeset patch
># User cl349@firebug.cl.cam.ac.uk
># Node ID 8fe8a99b1c2a6ea88624546ab625eaa0758e3a17
># Parent e69cbfee4011da1648718f1f5cbe8dabb956e72a
>New console transport and update xenconsoled.
>Add a new console interface using a seperate shared page and event channel
>instead of passing the console input/output over control
2010 Aug 11
2
a question regarding updating formulas with coefficients
I have formulae with coefficents that I would like to update. However, I get some strange results. For example, see the following:
For the formula y ~ d+ 3*r+t I want to add a variable p, so
> update(y~d+0*r+t, .~.+p)
produces
y ~ d + t + p - 1
If the coefficient is not 0, but rather, something else - say, 3, I get the following:
> update(y~d+3*r+t, .~.+p)
Error in
2008 Jan 12
2
glm expand model to more values
Hi
I have the problem with fitting curve to data with lm and glm. When I
use polynominal dependiency, fitted values from model are OK, but I
cannot recive proper values when I use coefficents to caltulate this.
Let me present simple example:
I have simple data.frame: (dd)
a: 1 2 3 4 5 6
b: 3 5 6 7 9 10
I try to fit it to model:
model=glm(b~poly(a,3),data=dd)
I have following data
2003 Aug 14
2
Using spline parameters to generate data
# I need to generate some data. I'm modeling some time series that follow
a
# negative exponential decay (mostly). I have 20 samples that can easily
be fit with cubic splines.
# What I want to do is generate many thousands of similar samples using
the parameters from the splines
# For instance one data sample looks not unlike this:
foo.curve <- 1 * exp(-0.01 * 1:500) + 0.5
2006 Apr 07
4
saving estimates from a for loop for later use
Thanks to the help of many on this list, I am now an R user and have
been able to write some functioning code to do matching estimation.
I have two for loops (i in 1:3, and j in 0:2). Within the loops, I
had been creating matrices of relevant estimation coefficents in order
to make lots of LaTeX tables.
Well, now I want to be able to combine the results of many different
estimations from within
2006 Jan 31
1
warnings in glm (logistic regression)
Hello R users
I ran more than 100 logistic regression analyses. Some of the analyses gave
me this kind warning below.
###########################################################
Warning messages:
1: algorithm did not converge in: glm.fit(x = X, y = Y, weights = weights,
start = start, etastart = etastart, ...
2: fitted probabilities numerically 0 or 1 occurred in: glm.fit(x = X, y =
Y,
2004 Oct 08
1
Correlation Matrix
Hi,
I'm dealing with a datamining analysis: I've a lot of
categories of product sold per week (n. week =26, n.
categories about 50.
my dataframe is like this:
Settimana ALIMENTI..ALTRI. ALIMENTI.APROTEICI
1 1 3 19
2 2 2 0
3 3 1 22
4 4 2
2010 Nov 13
1
Define a glm object with user-defined coefficients (logistic regression, family="binomial")
Hi there,
I just don't find the solution on the following problem. :(
Suppose I have a dataframe with two predictor variables (x1,x2) and one
depend binary variable (y). How is it possible to define a glm object
(family="binomial") with a user defined logistic function like p(y) =
exp(a + c1*x1 + c2*x2) where c1,c2 are the coefficents which I define.
So I would like to do no
2013 Jan 10
10
[PATCH v2 1/2] xenconsoled: use grant references instead of map_foreign_range
Grant references for the xenstore and xenconsole shared pages exist, but
currently only xenstore uses these references. Change the xenconsole
daemon to prefer using the grant reference over map_foreign_range when
mapping the shared console ring.
This allows xenconsoled to be run in a domain other than dom0 if set up
correctly - for libxl, the xenstore path /tool/xenconsoled/domid
specifies the
2007 May 26
1
How to get the "Naive SE" of coefficients from the zelig output
Dear R-user:
After the fitting the Tobit model using zelig, if I use the following command then I can get the regression coefficents:
beta=coefficients(il6.out)
> beta
(Intercept) apache
4.7826 0.9655
How may I extract the "Naive SE" from the following output please?
> summary(il6w.out)
Call:
zelig(formula = il6.data$il6 ~ il6.data$apache, model =
2012 Dec 09
1
Some coefficients are doubled when I use the step() function
Hello-
Such a strange problem, can't figure it out at all. Using binomial glm
models, and the step() function, so the call looks like this:
sectionmodel = glm(formula = Target3 ~ S1Q12_NUM.1 + S1Q9_NUM.1 + S1Q5_NUM.1 +
S1Q7_NUM.1 + S1Q8_NUM.1 + S1Q6_NUM.1 + S1Q10_NUM.1 + S1Q12_BURG.1 +
S1Q12_CD.1 + S1Q4.1 + S1Q12_OTHVIOL.1 + S1Q8.1 + S1Q12_GBH.1 +
S1Q11.1 + S1Q7.1 + S1Q12_THEFT.1
2006 Jan 29
1
extracting 'Z' value from a glm result
Hello R users
I like to extract z values for x1 and x2. I know how to extract coefficents
using model$coef
but I don't know how to extract z values for each of independent variable. I
looked around
using names(model) but I couldn't find how to extract z values.
Any help would be appreciated.
Thanks
TM
#########################################################
>summary(model)
Call:
2007 Jun 25
2
Re : Half of a heatmap
> I am trying to produce a heatmap of pairwise correlations, but since the matrix is
> symmetric, I only need either the upper or the lower triangle. I have scoured the
> web and R documentation, but I have not been able to find a way to produce such a
> figure. Is there a simple way to produce a heat map with only the part above or
> below the diagonal?
You might want to check
2010 Sep 07
1
Saving fits (glm, nls) without data
Is there any package that assists in saving and reconstituting glm and
nls fits without bringing along the accompanying data? A quick search
on CRAN didn't turn up anything.
If not, how do other people deal with saving the coefficients of model
fits?
For example, I've run a glm fit that has 23 coefficents on data set that
had 193,008 rows, by the time the fit was called. When I save
2005 Jul 28
1
Forcing coefficents in lm(), recursive residuals, etc.
Hello all,
Does anyone know how to constrain/force specific coefficients when running
lm()?
I need to run recresid() {strucchange package} on the residuals of
forecast.lm, but forecast.lm's coefficients must be determined by
parameter.estimation.lm
I could estimate forecast.lm without lm() and use some other kind of
optimisation, but recresid() requires an object with class lm.
2010 Jul 14
0
fGarch: garchFit() with fixed coefficents
hello everybody,
I would like to fit a model to a times series (testing set) for out of
sample predictions using garchFit(). I would like to keep the coefficients
of ARMA/GARCH model fixed (as found by fitting the model to my training
set). The arima fitting function has such an option for that (fixed=NULL)
but the garchFit() doesnt.
It is very important for me to keep the same coefficients
2002 Jul 18
1
sem: incorrect parameter estimates
Hello.
I am getting results from sem that are not correct (that's assuming
that the results from my AMOS 4.0 software are correct). sem does not
vary some of the parameters substantially from their starting values,
and the final estimates of those parameters as well as the model
chisquare value are incorrect. I've attached some code that
replicates the problem. The parameters in
2013 May 05
1
slope coefficient of a quadratic regression bootstrap
Hello,
I want to know if two quadratic regressions are significantly different.
I was advised to make the test using
step 1 bootstrapping both quadratic regressions and get their slope
coefficients.
(Let's call the slope coefficient *â*^1 and *â*^2)
step 2 use the slope difference *â*^1-*â*^2 and bootstrap the slope
coefficent
step 3 find out the sampling distribution above and
2004 Sep 10
2
2/0, 2/2 3/0, 3/2, 5.1, wxyz
Josh Coalson wrote:
> --- smoerk <smoerk@gmx.de> wrote:
>
>>i didn't find anything about tagging flac files as surround files. i
>>think there should some possibility to tell the player how to play a
>>multi-channel file (how to map the different channels to the speakers
>>or if there some decode is needed, like for ambisonic files).
>
>
> it