Displaying 20 results from an estimated 8000 matches similar to: "No subject"
2006 Oct 18
1
MARS help?
I'm trying to use mars{mda} to model functions that look fairly
close to a sequence of straight line segments. Unfortunately, 'mars'
seems to totally miss the obvious places for the knots in the apparent
first order spline model, and I wonder if someone can suggest a better
way to do this. The following example consists of a slight downward
trend followed by a jump up after
2004 Aug 10
1
Error message in function mars() in package mda
Hi,
I am using function mars() in package mda to find knots in a whole bunch
of predictor variables. I hope to be able to replicate all or some of
the basis functions that the MARS software from Salford Systems creates.
When I ran mars() on a small dataset, I was able to get the knots.
However, when I tried running mars() on a larger dataset (145 predictor
variables), for a different
2008 Jun 12
1
Problems with mars in R in the case of nonlinear functions
Hi,
I'm trying to use mars function in R to interpolate nonlinear
multivariate functions.
However, it seems that mars gives me a fit which uses only very few
basis function and
it underfits very badly.
For example, I have tried the following code to test mars:
require("mda")
f <- function(x,y) { x^2-y^2 };
#f <- function(x,y) { x+2*y };
# Grid
x <-
2002 Sep 27
2
Polymars
I've seen references to "polymars", an R implementation of Friedman's MARS
algorithm. Can anyone tell me where I might be able to find this (doesn't
seem to be in the contributed packages.
Thanks,
David
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2006 Apr 19
1
R-squared for MARS models
Hi,
is there an R function which can compute the R-squared
for a mars model fitted using the mda package?
many thanks in advance
best regards
Marco Girardello
2004 Apr 06
4
missing values for mda package
Dear helpers,
I am trying to use the mda package downloaded from the R website, but
the data set has missing values so I got an error message. Should I
manually handle these missing values? I was trying to read the documents
to specify any option related to missing values, but I did not find it.
Please forgive me if I ignore something obvious.
Thanks,
Zhu Wang
Statistical Science Department
2005 Dec 12
2
Bivariate Splines in R
Hi..,
is there a function in R to fit bivariate splines
?
I came across 'polymars' (POLSPLINE) and 'mars' (mda)
packages. Are these the one to use or are there other
specific commands?
Thanks.
Harsh
2010 Dec 26
1
Question about mars() -function
Hi!
I have some questions about MARS model's coefficient of determination.
I use the MARS method in my master's thesis and I have noticed some
problems with
the MARS model's R^2.
You can see the following example that the MARS model's R^2 is too big
when i have used mars() -function for MARS model building, and when I
have made MARS-model using a linear regression, it
2010 Apr 01
2
[LLVMdev] AnalysisUsage: addRequired vs. addRequiredTransitive
On Mar 31, 2010, at 3:13 PM, Owen Anderson wrote:
> Some analyses, like Andersen's AA, do all their computation in their
> runOnFunction(). Therefore, anything they depended on can be
> destroyed after the runOnFunction() returns.
What about AA itself? Would addRequired<AliasAnalysis> keep
AliasAnalysis alive (but allow AliasAnalysis's dependencies to die)?
>
2010 Apr 01
0
[LLVMdev] AnalysisUsage: addRequired vs. addRequiredTransitive
On Fri Apr 02 00:37:03 +0200 2010, Trevor Harmon wrote:
> On Mar 31, 2010, at 3:13 PM, Owen Anderson wrote:
> > Others, like MemoryDependenceAnalysis, are "lazy." MDA
> > specifically does NOT compute results in its runOnFunction(),
> > instead computing results on-demand when a user queries it. Because
> > MDA depends on AA, we must ensure that, as long as
2018 Apr 08
5
lda fails in parse_angle_addr if sieve is enabled
Hi,
Since updating to 2.3.1 on my FreeBSD mailserver mail delivery using
lda is broken if I have sieve enabled.
(Before updating this was 2.2 and pigeonhole 0.4)
FreeBSD 11.1-p8 amd64
Dovecot 2.3.1
Pigeonhole 0.5.1
Mailflow is OpenSMTPd as MTA, using mda delivery to rspamc which
utlimately delivers using dovecot-lda.
smtpd.conf
deliver to mda "rspamc -h scan --mime -e
2024 Jul 16
2
Automatic Knot selection in Piecewise linear splines
>>>>> Anupam Tyagi
>>>>> on Tue, 9 Jul 2024 16:16:43 +0530 writes:
> How can I do automatic knot selection while fitting piecewise linear
> splines to two variables x and y? Which package to use to do it simply? I
> also want to visualize the splines (and the scatter plot) with a graph.
> Anupam
NB: linear splines, i.e. piecewise
2006 May 12
2
Voicemail WAV to PDA Problems
Our asterisk server has been up and running for over a year and it works
great. I have emails going to my account as an attachment and I can
listen to them on the desktop and it works fine. I just got a T-Mobile
MDA that runs Windows Pocket (or whatever they call it) and it can check
email. If I have it download the email, it gets the attachment, but it
can't seem to play it (it CAN
2010 Mar 31
2
[LLVMdev] AnalysisUsage: addRequired vs. addRequiredTransitive
Hi,
I'm a bit confused about the distinction between addRequired and
addRequiredTransitive in AnalysisUsage. From PassAnalysisSupport.h:
"REQUIRES (must be available when the pass runs), REQUIRES TRANSITIVE
(must be available throughout the lifetime of the pass)."
The part that's confusing me is "must be available when the pass
runs". I don't see how
2002 Mar 25
1
MARS
Is there a function for MARS (Modeling with Automated Regression
Tools) available for R PC window users ? I know there is a commercial
package from Salford systems and there is a shared function for Unix
system.
Nancy Lo
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2005 Dec 14
1
writing an MDA, help me avoid corrupted indexes
Hello.
First, I want to thank those responsible for Dovecot IMAP as it was a
real treat to implement in comparison to my mostly-failed attempts with
Cyrus. The passwd-file authentication was exactly what I needed as I
really didn't want to have to deal with PAM or LDAP but where I am
setting up a server with virtual accounts.
I'm using Postfix as an MTA, and it quite handily passes
2013 Oct 21
3
Error in heatmap
Hi,
Could you please help?
Heatmap doesn't work with:
> heatmap(as.matrix(SPIV2),na.rm = T)
Error in hclustfun(distfun(x)) :
NA/NaN/Inf in foreign function call (arg 11)
There are no 0 data rows or column
Thanks a lot
Regards
---------------------------------------
David
2010 Mar 31
0
[LLVMdev] AnalysisUsage: addRequired vs. addRequiredTransitive
On Mar 31, 2010, at 2:53 PM, Trevor Harmon wrote:
> I'm a bit confused about the distinction between addRequired and
> addRequiredTransitive in AnalysisUsage. From PassAnalysisSupport.h:
>
> "REQUIRES (must be available when the pass runs), REQUIRES TRANSITIVE
> (must be available throughout the lifetime of the pass)."
>
> The part that's confusing me
2009 Feb 04
4
pop3_lock_session question
Hello, I'm preparing to convert from qpopper + UW-IMAP to dovecot.
So far testing has gone very well. One problem we haven't figured
out is that long-running POP sessions keep the mailbox locked, so that
the MDA times out while trying to deliver. We're using "maildrop" as
our MDA if that matters.
We don't see this issue for dovecot IMAP sessions. During long-running
2004 Mar 03
8
need help with smooth.spline
Dear R listers,
When using smooth.spline to interpolate data, results are generally
good. However, some cases produce totally unreasonable results.
The data are values of pressure, temperature, and salinity from a
probe that is lowered into the ocean, and the objective is to
interpolate temperature and salinity to specified pressures. While
smooth.spline provides excellent values at the