Displaying 20 results from an estimated 190 matches similar to: "Help me please...Large execution time in auto.arima() function"
2005 Aug 27
2
zoo, zooreg, & ISOdatetime
I create a zooreg object that runs from Jan-1-2002 0:00 to Jun-1-2005
0:00...
regts.start = ISOdatetime(2002, 1, 1, hour=0, min=0, sec=0, tz="")
regts.end = ISOdatetime(2005, 6, 1, hour=0, min=0, sec=0, tz="")
regts.zoo <- zooreg( NA, regts.start, regts.end, deltat=3600 )
Upon inspection:
> regts.zoo[1:3]
2002-01-01 00:00:00 2002-01-01 01:00:00 2002-01-01 02:00:00
2011 Feb 16
1
Timeseries Data Plotted as Monthly Boxplots
Hello, I'm trying to develop a box plot of time series data to look at the
range in the data values over the entire period of record.
My data initially starts out as a list of hourly data, and then I've been
using this code to make this data into the final ts array.
# Read in the station list
stn.list <- read.csv("/home/kbennett/fews/stnlist3", as.is=T, header=F)
# Read in
2007 Oct 24
0
Package forecast
Hello All,
I trying to use the function auto.arima(....) from package forecast but I
have a problem.
My steps after I used the function auto.arima(...)
I create the time series like this:
>bbrass = scan("C:/Program Files/R/data PTIN/my_file.dat")
>regts.start = ISOdatetime(2006, 7, 1, hour=0, min=0, sec=0, tz="GMT") #2006
07 01 00
>regts.end = ISOdatetime(2006, 7,
2007 Oct 10
3
(no subject)
Hello,
I problem is in the format of the date, my time series is like this:
2006070100 1244 61 62
2006070101 1221 60 60
2006070102 1214 60 60
2006070103 1194 59 59
2006070104 1182 58 58
2006070105 1178 58 58
2006070106 1176 58 58
2006070107 1173 58 58
2005 Aug 27
1
ARIMA (seasonal) backcasting & interpolation
Thanks for everyone's help with zoo -- I think I've got my data set
ready. (The data consists of surface weather temperatures, from 2002
to 2005, one observation per hour. Some values are missing... i.e. NA)
I have three goals:
GOAL #1:Get the data in proper time series form, preserving frequency
information:
> w4.ts <- as.ts( w3.zoo, frequency=(1/3600) )
I hope that 1/3600
2009 Apr 18
1
"No space left on device" at 69%
Hi,
there''s no information about reporting bugs in the btrfs wiki, so I try it
here.
For testing purposes, I have put all my Gentoo portage (build, distfiles, etc.)
related LVs into one 10G btrfs with 4 subvolumes.
While building OpenOffice yesterday, it failed with a "No space left on device"
error, although the LV was only 69% full in total.
Details (Builds of Gentoo
2016 Jan 02
4
[Bug 93563] New: Hack'n'Slash hangs with Nouveau driver
https://bugs.freedesktop.org/show_bug.cgi?id=93563
Bug ID: 93563
Summary: Hack'n'Slash hangs with Nouveau driver
Product: Mesa
Version: git
Hardware: x86-64 (AMD64)
OS: Linux (All)
Status: NEW
Severity: normal
Priority: medium
Component: Drivers/DRI/nouveau
Assignee:
2009 Aug 17
0
"no space while hiding cursor" + extreme slowness on Quadro NVS 140M
Hi,
I've been using the nouveau driver for some time on my Latitude T61p
with a Quadro NVS 140M card:
4pll00555 ~ # lspci
00:00.0 Host bridge: Intel Corporation Mobile PM965/GM965/GL960 Memory
Controller Hub (rev 0c)
00:01.0 PCI bridge: Intel Corporation Mobile PM965/GM965/GL960 PCI
Express Root Port (rev 0c)
00:19.0 Ethernet controller: Intel Corporation 82566MM Gigabit Network
Connection
2007 Feb 08
2
problem with asterisk AGI
I have a fairly complicated setup. Extensions (1,2 and 3). In 3 - I
execute AGI in java which plays few wav files depending on external
parameters.
Can I have a dial plan inside my AGI? If not, how do I accomodate user
who needs to reach extension 2 from my agi? I have tried stream file and
get data but the two commands did not work at all.
2007 Jan 09
3
min() return factor class values
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2009 Apr 29
2
AICc
I am fitting logistic regression models, by defining my own link
function, and would like to get AICc values. Using the glm command
gives a value for AIC, but I haven't been able to get R to convert
that to AICc. Is there a code that has already been written for
this? Right now I am just putting the AIC values into an excel
spreadsheet and calculating AICc, likelihood, and AIC
2009 May 05
0
stepAICc function (based on MASS:::stepAIC.default)
Dear all,
I have tried to modify the code of MASS:::stepAIC.default(), dropterm() and addterm() to use AICc instead of AIC for model selection.
The code is appended below. Somehow the calculations are still not correct and I would be grateful if anyone could have a look at what might be wrong
with this code...
Here is a working example:
##
require(nlme)
model1=lme(distance ~ age + Sex, data =
2017 Jun 08
1
stepAIC() that can use new extractAIC() function implementing AICc
I would like test AICc as a criteria for model selection for a glm using
stepAIC() from MASS package.
Based on various information available in WEB, stepAIC() use
extractAIC() to get the criteria used for model selection.
I have created a new extractAIC() function (and extractAIC.glm() and
extractAIC.lm() ones) that use a new parameter criteria that can be AIC,
BIC or AICc.
It works as
2012 Feb 13
2
R's AIC values differ from published values
Using the Cement hardening data in Anderson (2008) Model Based Inference in
the Life Sciences. A Primer on Evidence, and working with the best model
which is
lm ( y ~ x1 + x2, data = cement )
the AIC value from R is
model <- lm ( formula = y ~ x1 + x2 , data =
cement )
AIC ( model )
64.312
which can be converted to AICc by adding the bias
2005 Nov 03
1
Help on model selection using AICc
Hi,
I'm fitting poisson regression models to counts of birds in
1x1 km squares using several environmental variables as predictors.
I do this in a stepwise way, using the stepAIC function. However the
resulting models appear to be overparametrized, since too much
variables were included.
I would like to know if there is the possibility of fitting models
by steps but using the AICc
2005 Nov 17
3
loess: choose span to minimize AIC?
Is there an R implementation of a scheme for automatic smoothing
parameter selection with loess, e.g., by minimizing one of the AIC/GCV
statistics discussed by Hurvich, Simonoff & Tsai (1998)?
Below is a function that calculates the relevant values of AICC,
AICC1 and GCV--- I think, because I to guess from the names of the
components returned in a loess object.
I guess I could use
2006 Dec 12
1
Calculating AICc using conditional logistic regression
I have a case-control study that I'm analysing using the conditional
logistic regression function clogit from the survival package.
I would like to calculate the AICc of the models I fit using clogit.
I have a variety of scripts that can calculate AICc for models with a
logLik method, but clogit does not appear to use this method.
Is there a way I can calculate AICc from clogit in R?
Many
2014 Jun 26
0
AICc in MuMIn package
Hello,
I am modelling in glmmADMB count data (I´m using a negative binomial
distribution to avoid possitive overdispersion) with four fixed and one
random effect. I´m also using MuMIn package to calculate the AICc and also
to model averaging using the function dredge. What I do not understand is
why dredge calculates a different value of the AICc and degrees of freedom
than the function AICc
2004 Dec 04
1
AIC, AICc, and K
How can I extract K (number of parameters) from an AIC calculation, both to
report K itself and to calculate AICc? I'm aware of the conversion from AIC ->
AICc, where AICc = AIC + 2K(K+1)/(n-K-1), but not sure of how K is calculated
or how to extract that value from either an AIC or logLik calculation.
This is probably more of a basic statistics question than an R question, but I
thank
2005 Oct 29
2
LaTex error when creating DVI version when compiling package
Dear Listers,
I got this message when compiling a package:
* creating pgirmess-manual.tex ... OK
* checking pgirmess-manual.text ... ERROR
LaTex errors when creating DVI version.
This typically indicates Rd problems.
The message is quite explicit but I struggled a lot before understanding
that the trouble comes from a single file "selMod.rd" among 44 topics.
Even though I have