Displaying 17 results from an estimated 17 matches similar to: "Multinomial logistic regression under R and Stata"
2002 Jun 27
1
using identify() with scatterplot3d()
Dear all
I am running R 1.4.1 on a Linux box. I have tried to label data points
in a 3-d scatterplot, but without much success. What I did was as
follows:
> scatterplot3d(x, y, z)
> identify(x, y, z, row.names(Data))
When I tried to click on/near the data points, I either receive this
msg:
warning: no point with 0.25 inches,
or some numbers in Data, not the row names, come up on the
2007 May 01
1
creating eps files
Hello,
For a long time, I have been creating eps files from R using the
following command:
dev.copy2eps(file="my.eps")
This has worked very well. But recently, the compositor of a journal is
complaining that
"The eps files would be useable except that they have not converted the
type to outlines"
Sorry for being vague, but I have no idea what this compositor is
talking
2004 Feb 23
2
orthonormalization with weights
Hello List,
I would like to orthonormalize vectors contained in a matrix X taking into
account row weights (matrix diagonal D). ie, I want to obtain Z=XA with
t(Z)%*%D%*%Z=diag(1)
I can do the Gram-Schmidt orthogonalization with subsequent weighted
regressions. I know that in the case of uniform weights, qr can do the
trick. I wonder if there is a way to do it in the case of non uniform
2016 Oct 24
3
typo or stale info in qr man
man for `qr` says that the function uses LINPACK's DQRDC, while it in
fact uses DQRDC2.
```
The QR decomposition of the matrix as computed by LINPACK or LAPACK.
The components in the returned value correspond directly to the values
returned by DQRDC/DGEQP3/ZGEQP3
```
2008 Sep 05
1
Orthogonalization algorithms
Hi,
I have eight vectors that I would like to orthogonalize preferably
using R. The vectors are of considerable length, however due to their
nature I know they satisfy the conditions needed to apply the
Gram-Schmidt algorithm. Before I embark on some R coding, I wanted to
check that there is no facility / function already around that computes
the orthogonalized set of vectors? I have performed
2013 Aug 08
1
Reason for difference in singular value decomposition produced by function La.svd (via prcomp)?
Dear expeRts,
I have run some simulations under R 2.15.1 on a Mac, and I have rerun a
sample of them under R 3.0.1 on Windows (and also for comparison under
R2.14.1 on Windows). For most cases, I get exactly the same results in
all three runs. However, for those cases that depend on principal
components computed with prcomp, where the particular choice of the
orthogonalization is arbitrary
2013 Aug 08
1
Reason for difference in singular value decomposition produced by function La.svd (via prcomp)?
Dear expeRts,
I have run some simulations under R 2.15.1 on a Mac, and I have rerun a
sample of them under R 3.0.1 on Windows (and also for comparison under
R2.14.1 on Windows). For most cases, I get exactly the same results in
all three runs. However, for those cases that depend on principal
components computed with prcomp, where the particular choice of the
orthogonalization is arbitrary
2006 Oct 18
1
Calculation of Eigen values.
Dear all R users,
Can anyone tell me to calculate Eigen value of any real symmetric matrix
which algorithm R uses? Is it Jacobi method ? If not is it possible to get
explicit algorithm for calculating it?
Thanks and regards,
Arun
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2008 Jul 03
2
First attempt to use R
While I am not a novice when it comes to statistics, this will be the first
time I have used R, apart from some intial play. I have normally written my
own code for statistical analysis in C++ or fortran, for a number of reasons
(in part contingent on what the boss was willing to pay for), and having been
programming for a long time, there is no need to spare me the programming
details.
2002 Sep 09
1
impulse response function
Hi,
Is there a function in any of R-packages that can produce and plot the
impulse response function for any model..
Thank you
Ahmad Abu Hammour
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2003 Aug 13
3
A question on orthogonal basis vectors
Hey, R-listers,
I have a question about determining the orthogonal
basis vectors.
In the d-dimensinonal space, if I already know
the first r orthogonal basis vectors, should I be
able to determine the remaining d-r orthognal basis
vectors automatically?
Or the answer is not unique?
Thanks for your attention.
Fred
2010 Nov 03
1
Orthogonalization with different inner products
Suppose one wanted to consider random variables X_1,...X_n and from each subtract off the piece which is correlated with the previous variables in the list. i.e. make new variables Z_i so that Z_1=X_1 and Z_i=X_i-cov(X_i,Z_1)Z_1/var(Z_1)-...- cov(X_i,Z__{i-1})Z__{i-1}/var(Z_{i-1}) I have code to do this but I keep getting a "non-conformable array" error in the line with the covariance.
2015 Mar 25
0
PJSIP configuration for Asterisk 13.1.0/SIP trunk outbound calling
Hello,
I have had numerous issues with PJSIP outbound calling in Asterisk 13.1.0
and SIP.US SIP trunk. My Asterisk server is on EC2 and I have opened up the
appropriate ports. The SIP clients can be anywhere on the Internet,
including behind NATs.
I am able to get to my Asterisk server's internal extensions via the DID
(and appropriate dialplans) but I am not able to make outbound calls to
2010 Jun 08
0
TS model
I am looking at a new project involving time series analysis. I know I can
complete the tasks involving VARMA using either dse or mAr (and I think
there are a couple others that might serve).
However, there is one task that I am not sure of the best way to proceed.
A simple example illustrates what I am after. If you think of a simple
ballistic problem, with a vector describing current
2004 Aug 31
1
(no subject)
A correction. You either need to open the plotting device prior to the
simulation that includes your plotting commands and close it after the
simulation or have the name change dynamically in your simulation so that
the runs go in separate files.
An example of the first method would be
postscript(file="/where/to/put/file/filename.ps")
## your simulation commands
dev.off()
for the
2010 Jul 29
0
[R-pkgs] heplots 0.9-3 and candisc 0.5-18 released to CRAN
I've just released the latest R-Forge versions of heplots 0.9-3 and
candisc 0.5-18 to CRAN.
They should appear there within a day or two.
== heplots
The heplots package provides functions for visualizing hypothesis tests
in multivariate linear models (MANOVA, multivariate multiple regression,
MANCOVA, etc.). They
represent sums-of-squares-and-products matrices for linear hypotheses
and for
2007 May 03
0
unscrible pls
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