Displaying 20 results from an estimated 4000 matches similar to: "get_all_vars fails with matrices (PR#13624)"
2008 Jun 09
0
Fwd: mgcv 1.4 on CRAN
mgcv 1.4 is now on CRAN. It includes new features to allow mgcv::gam to fit
almost any (quadratically) penalized GLM, plus some extra smoother classes.
New gam features
-------------------------
* Linear functionals of smooths can be included in the gam linear predictor,
allowing, e.g., functional generalized linear models/signal regression,
smooths of interval data, etc.
* The parametric
2008 Jun 09
0
Fwd: mgcv 1.4 on CRAN
mgcv 1.4 is now on CRAN. It includes new features to allow mgcv::gam to fit
almost any (quadratically) penalized GLM, plus some extra smoother classes.
New gam features
-------------------------
* Linear functionals of smooths can be included in the gam linear predictor,
allowing, e.g., functional generalized linear models/signal regression,
smooths of interval data, etc.
* The parametric
2011 Aug 16
0
Cubic splines in package "mgcv"
re: Cubic splines in package "mgcv"
I don't have access to Gu (2002) but clearly the function R(x,z) defined
on p126 of Simon Wood's book is piecewise quartic, not piecewise cubic.
Like Kunio Takezawa (below) I was puzzled by the word "cubic" on p126.
As Simon Wood writes, this basis is not actually used by mgcv when
specifying bs="cr".
Maybe the point is
2009 Mar 04
0
mgcv 1.5-0
mgcv 1.5-0 is now on CRAN. Main changes are:
* REML and ML smoothness selection are now available.
* A Tweedie family has been added.
* `gam.method' has been replaced (see arguments `method' and `optimizer'
for `gam')
For other changes see the changeLog.
Simon
--
> Simon Wood, Mathematical Sciences, University of Bath, Bath, BA2 7AY UK
> +44 1225 386603
2009 Mar 04
0
mgcv 1.5-0
mgcv 1.5-0 is now on CRAN. Main changes are:
* REML and ML smoothness selection are now available.
* A Tweedie family has been added.
* `gam.method' has been replaced (see arguments `method' and `optimizer'
for `gam')
For other changes see the changeLog.
Simon
--
> Simon Wood, Mathematical Sciences, University of Bath, Bath, BA2 7AY UK
> +44 1225 386603
2011 Jun 09
0
Fwd: Re: residual checking for GAM (mgcv)
The plots look reasonable to me. The plot of residuals against linear
predictor always looks scary when many of the fitted values are very
close to zero, so I tend to look at residuals against sqrt(fitted) in
such cases. I don't think that the presence of the zero curve is a
reason to reject the model --- it's easy to produce such plots by
fitting a completely correct model to simulated
2017 Mar 26
1
Documentation of model.frame() and get_all_vars()
Hi everyone,
This is about documentation for the model.frame() page. The
get_all_vars() function (added in R 2.5.0) is a great addition, but
the behavior of its '...' argument is different from that of
model.frame() with which it is documented and this creates ambiguity.
The current docs read:
\item{\dots}{further arguments such as \code{data}, \code{na.action},
\code{subset}. Any
2011 Jan 14
1
naresid.exclude query
x <- NA
na.act <- na.action(na.exclude(x))
y <- rep(0,0)
naresid(na.act,y)
... currently produces the result...
numeric(0)
... whereas the documentation might lead you to expect
NA
The behaviour is caused by the line
if (length(x) == 0L) return(x)
in `stats:::naresid.exclude'. Removing this line results in the behaviour I'd
expected in the above example (and in a
2012 Oct 01
0
[Fwd: REML - quasipoisson]
Hi Greg,
For quasi families I've used extended quasi-likelihood (see Mccullagh
and Nelder, Generalized Linear Models 2nd ed, section 9.6) in place of
the likelihood/quasi-likelihood in the expression for the (RE)ML score.
I hadn't realised that this was possible before the paper was published.
best,
Simon
ps. sorry for slow reply, the original message slipped through my filter
for
2017 Mar 30
0
get_all_vars() does not handle rhs matrices in formulae
Hello again,
It appears that get_all_vars() incorrectly handles model formulae that
use a right-hand side (rhs) matrix. For example, consider these two
substantively identical models:
# model using named variables
mpg <- mtcars$mpg
wt <- mtcars$wt
hp <- mtcars$hp
m1 <- lm(mpg ~ wt + hp)
# model using matrix
y <- mtcars$mpg
x <- cbind(mtcars$wt, mtcars$hp)
m2 <- lm(y ~ x)
2007 Mar 18
1
Error with get_all_vars()
> get_all_vars(dist ~ speed, data = cars)
Error in `row.names<-.data.frame`(`*tmp*`, value = c(NA, -50L)) :
invalid 'row.names' length
> version
_
platform i386-pc-mingw32
arch i386
os mingw32
system i386, mingw32
status Under development (unstable)
major 2
minor 5.0
year 2007
month
2006 Apr 11
1
gaussian family change suggestion
Hi,
Currently the `gaussian' family's initialization code signals an error if
any response data are zero or negative and a log link is used. Given that
zero or negative response data are perfectly legitimate under the GLM
fitted using `gaussian("log")', this seems a bit unsatisfactory. Might
it be worth changing it?
The current offending code from `gaussian' is:
2019 Nov 18
2
Inappropriate class(o)[!inherits(o,"AsIs")] in get_all_vars
>>>>> Martin Maechler
>>>>> on Mon, 18 Nov 2019 12:15:38 +0100 writes:
>>>>> suharto anggono--- via R-devel
>>>>> on Sun, 17 Nov 2019 10:34:31 +0000 writes:
>> SVN revision 77401 changes
>> x[isM] <- lapply(x[isM], function(o) `class<-`(o, class(o)[class(o) != "AsIs"]))
>> to
2019 Nov 17
2
Inappropriate class(o)[!inherits(o,"AsIs")] in get_all_vars
SVN?revision?77401?changes
????????x[isM]?<-?lapply(x[isM],?function(o)?`class<-`(o,?class(o)[class(o)?!=?"AsIs"]))
to
????????x[isM]?<-?lapply(x[isM],?function(o)?`class<-`(o,?class(o)[!inherits(o,"AsIs")]))
in?function?'get_all_vars'?in?src/library/stats/R/models.R?in?R?devel.
The?change?is?inappropriate.
2019 Nov 29
0
Inappropriate class(o)[!inherits(o,"AsIs")] in get_all_vars
class(o)[!inherits(o,"AsIs")] is still in function 'get_all_vars' in R patched (in https://svn.r-project.org/R/branches/R-3-6-branch/src/library/stats/R/models.R). It was ported to R patched by r77402. On Monday, 18 November 2019, 8:12:10 PM GMT+7, Martin Maechler <maechler at stat.math.ethz.ch> wrote:
>>>>> Martin Maechler
>>>>>? ?
2001 Sep 25
1
rbinding dataframes
I've got a data frame which I've split by a factor,
creating a list of dataframes which I have then done
various operations on individually. I next want to
recombine the resulting dataframes (still held in a list,
still with the same number of columns with the same names)
and there does not appear to be a `good' way to do this -
at the moment, I'm using a for-loop with the rbind
2002 Dec 30
1
R on the Zaurus link
Hello All,
The link to the binary & installation instructions (tar.gz binary not an ipk
I'm afraid) is as follows: http://students.bath.ac.uk/enpsgp/Zaurus/#R
It eventually dawned on me that the WORDS_BIGENDIAN define (or lack thereof)
was causing the problems (after testing ieee NaN compliance that is).
When cross-compiling it's probably fair enough that the configure script
2001 Apr 23
4
Time series in R
The help pages of R-1.2.2 include several pages on various
time series functions, but when I try to use these functions
they appear not to be available .... am I missing something
obvious, or are these functions not yet built?
Chris Rogers
-----------------------------------------------------------------------
L C G Rogers, Professor of Probability tel:+44 1225 826224
Department of
2002 Nov 22
1
R on the Zaurus (the return)
Hello All,
I read in the archives that someone managed to compile R but that there were
problems with the fp performance, specifically the handling of NaNs. Could
someone please explain the problem to me and how to test whether it is
occurring.
I have just compiled R for the Zaurus 5500, and want to see whether it works
or requires tweaking.
Regards,
Simon
2010 Mar 04
2
which coefficients for a gam(mgcv) model equation?
Dear users,
I am trying to show the equation (including coefficients from the model
estimates) for a gam model but do not understand how to.
Slide 7 from one of the authors presentations (gam-theory.pdf URL:
http://people.bath.ac.uk/sw283/mgcv/) shows a general equation
log{E(yi )} = ?+ ?xi + f (zi ) .
What I would like to do is put my model coefficients and present the
equation used. I am an