Displaying 20 results from an estimated 10000 matches similar to: "using predict.lm() within a function"
2006 Mar 16
2
DIfference between weights options in lm GLm and gls.
Dear R-List users,
Can anyone explain exactly the difference between Weights options in lm glm
and gls?
I try the following codes, but the results are different.
> lm1
Call:
lm(formula = y ~ x)
Coefficients:
(Intercept) x
0.1183 7.3075
> lm2
Call:
lm(formula = y ~ x, weights = W)
Coefficients:
(Intercept) x
0.04193 7.30660
> lm3
Call:
2010 Sep 23
2
dnorm
Dear R-users
Idea:
Plot a dnorm line using specific mean/sd to complete a histogram (skewed). xs:range of y-values, ys: dnorm function
Problem:
I expected to multiply the ys function with the sample size (n=250-300). I was wondering about a factor between 12'000 and 30'000 to match the size of the dnorm line with the specific histogram.
Thanks
Sibylle
hist(Biotree[Ld,]$Height2008,
2005 Oct 16
2
Animated lissajous
Here's some code to make lissajous dance. I've attached a small sample
GIF.
Cheers,
Rob Steele
robsteele at yahoo dot com
plot.lissajous = function(omega.x, omega.y, delta = 0, num.thetas = 200)
{
thetas = seq(0, 2 * pi, length = num.thetas)
xs = sin(omega.x * thetas + delta)
ys = cos(omega.y * thetas)
plot(xs, ys, type = 'l', lwd = 3, ann = FALSE, axes = FALSE)
}
2013 Jan 29
3
how to suppress the intercept in an lm()-like formula method?
I'm trying to write a formula method for canonical correlation analysis,
that could be called similarly to lm() for
a multivariate response:
cancor(cbind(y1,y2,y3) ~ x1+x2+x3+x4, data=, ...)
or perhaps more naturally,
cancor(cbind(y1,y2,y3) ~ cbind(x1,x2,x3,x4), data=, ...)
I've adapted the code from lm() to my case, but in this situation, it
doesn't make sense to
include an
2011 Nov 08
2
NAMESPACES for data only packages
the NEWS file for R-devel says
*
Even data-only packages without *R* code need a namespace and so may
need to be installed under *R* 2.14.0 or later.
but what should this contain? Can it simply be an empty NAMESPACE
file? I assume that data does not have to
be exported.
-Michael
--
Michael Friendly Email: friendly AT yorku DOT ca
Professor, Psychology Dept.
York University
2023 May 20
1
[libguestfs-common PATCH] Add support for OCaml 5.0
Pervasives is deprecated since Ocaml 4.08 and has been
removed in OCaml 5.0.
https://github.com/ocaml/ocaml/pull/1605
---
mlstdutils/std_utils.ml | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/mlstdutils/std_utils.ml b/mlstdutils/std_utils.ml
index 0d2fa22..86b21a7 100644
--- a/mlstdutils/std_utils.ml
+++ b/mlstdutils/std_utils.ml
@@ -341,12 +341,12 @@ module List =
2011 Nov 04
3
barplot as histogram
Hello:
I'm dealing with an issue currently that I'm not sure the best way to
approach. I've got a very large (10G+) dataset that I'm trying to create
a histogram for. I don't seem to be able to use hist directly as I can
not create an R vector of size greater than 2.2G. I considered
condensing the data previous to loading it into R and just plotting
the frequencies as a
2016 Jul 07
2
Re: [PATCH v3 4/8] mllib: Add some imperative list manipulation functions.
On Thursday 07 July 2016 17:30:03 Richard W.M. Jones wrote:
> This adds imperative list manipulation functions inspired by Perl.
> The functions are passed list refs which get updated in place.
>
> This allows us to replace some awkward pure functional code like:
>
> let xs = ys in
> let xs = if foo then xs @ zs else xs in
>
> with:
>
> let xs = ref ys in
2002 Jan 05
1
abline and log plots (PR#1243)
Full_Name: Stephen Eglen
Version: 1.4
OS: Redhat Linux 7.1
Submission from: (NULL) (128.252.204.36)
abline() produces a spurious line in addition to the correct line, at least with
the X11 driver. The postscript file generated also has nan values in it, which
causes an error under ghostscript.
xs <- c(0, 150, 300)
ys <- c(75, 40, 23)
par(mfrow=c(1,2))
plot(xs,ys, log="")
2012 Apr 16
2
Problems with subset, droplevels and lm: variable lengths differ
[Env: R 2.14.2 / Win Xp]
In the script below, I want to select some variables from
rrcov::OsloTransect, delete cases with
any missing data, and subset the data frame Oslo to remove cases for two
levels of the
factor litho that occur with low frequency.
The checks I run on my new data frame Oslo look OK, but I when I try to
fit a multivariate
linear model with lm(), I am getting an error:
2016 Jul 08
2
Re: [PATCH v3 4/8] mllib: Add some imperative list manipulation functions.
On Thu, Jul 07, 2016 at 06:08:43PM +0100, Richard W.M. Jones wrote:
> On Thu, Jul 07, 2016 at 07:00:46PM +0200, Pino Toscano wrote:
> > On Thursday 07 July 2016 17:30:03 Richard W.M. Jones wrote:
> > > This adds imperative list manipulation functions inspired by Perl.
> > > The functions are passed list refs which get updated in place.
> > >
> > > This
2012 Feb 06
1
ggplot2 geom_polygon fill
Hi everyone,
i've been trying to make a special plot with ggplot2, but I can't get it to
fill the polygon I'd like to see filled so very very much.
I want to display the difference or change in the distribution of the
modified Rankin Scale between two groups. mRS is a scale for disability or
daily activities competence.
It looks like this.
2002 Jun 20
16
problem with predict()
Hi,
It is most probably just my R-ignorance, but I have following problem with
using predict(). I train the model using 164 cases and then I try to use
it on the data set with 35 cases, but I am getting 164 predictions ?
R-code below illustrates in more detail what I am doing.
Truly yours,
R
train = read.csv("train.csv", header = TRUE, row.names = "mol",
2012 May 10
2
setting global options for a package
This may be elementary, but I can't find an answer: How can I set up
global options for
some specific arguments to functions in a package which can be easily
changed by the user?
This question relates to the selection of colors used in functions in
several packages (heplots,
genridge), where I want to provide reasonable default values for plots,
but allow users to
change those defaults
2010 Oct 06
5
R: Tools for thinking about data analysis and graphics
I'm giving a talk about some aspects of language and conceptual tools
for thinking about how
to solve problems in several programming languages for statistical
computing and graphics. I'm particularly
interested in language features that relate to:
o expressive power: ease of translating what you want to do into the
results you want
o elegance: how well does the code provide a simple
2014 May 07
3
historical significance of Pr(>Chisq) < 2.2e-16
Where does the value 2.2e-16 come from in p-values for chisq tests such
as those
reported below?
> Anova(cm.mod2)
Analysis of Deviance Table (Type II tests)
Response: Freq
LR Chisq Df Pr(>Chisq)
B 11026.2 1 < 2.2e-16 ***
W 7037.5 1 < 2.2e-16 ***
Age 886.6 8 < 2.2e-16 ***
B:W 3025.2 1 < 2.2e-16 ***
B:Age 1130.4 8 < 2.2e-16 ***
W:Age 332.9 8 < 2.2e-16 ***
---
Signif.
2011 Nov 29
2
format numbers without leading or trailing 0s
A simple question, but I can't find something to do what I want:
Given: a vector of numbers, like
lambda <- c(0, 0.005, 0.01, 0.02, 0.04, 0.08)
Desired: format them in minimal space for use as plot labels, ie,
without leading or tailing 0s. For this example:
lambdaf <- c("0", .005", ".01", ".02", ".04", ".08")
--
Michael
2012 Jun 03
3
Modify pdf file with Illustrator.
Dear list,
Some times I want to modify the pdf file which produced by R with
illustrator. But when I use Illustrator open the pdf file, it often
makes the pdf some little changed. Anyone have some suggestions? Is it
better to use other file type, not pdf? Or when I produced the pdf, I
should set some other parameters?
Thank you
2011 Aug 06
0
ridge regression - covariance matrices of ridge coefficients
For an application of ridge regression, I need to get the covariance
matrices of the estimated regression
coefficients in addition to the coefficients for all values of the ridge
contstant, lambda.
I've studied the code in MASS:::lm.ridge, but don't see how to do this
because the code is vectorized using
one svd calculation. The relevant lines from lm.ridge, using X, Y are:
2011 Jul 31
3
R 2.13.1 can't find package binaries on R-Forge
[Env: Win XP]
I've just upgraded from R 2.12.2 to R 2.13.1. As part of my upgrade
process, I typically install some in-development
packages from R-Forge that are not on cran. But for the first time, it
doesn't work.
e.g.,
> install.packages("p3d", repos="http://R-Forge.R-project.org")
trying URL