Displaying 20 results from an estimated 1200 matches similar to: "user in two groups - acl problem"
2008 Aug 12
2
Maximum likelihood estimation
Hello,
I am struggling for some time now to estimate AR(1) process for commodity price time series. I did it in STATA but cannot get a result in R.
The equation I want to estimate is: p(t)=a+b*p(t-1)+error
Using STATA I get 0.92 for a, and 0.73 for b.
Code that I use in R is:
p<-matrix(data$p) # price at time t
lp<-cbind(1,data$lp) # price at time t-1
2012 Mar 25
2
Trying to link against libFLAC_static.lib (windows)
On Fri, Mar 23, 2012 at 9:45 PM, JonY <jon_y at users.sourceforge.net> wrote:
> On 3/23/2012 13:59, Glenn McCord wrote:
>> Hi. I'm trying to get a project linking to libFLAC_static.lib but I
>> get linker errors such as the following.
>>
>> The __imp__ prefix seems to imply that some kind of .dll usage is
>> happening, which it shouldn't.
>>
2011 Jan 04
2
Print plot to pdf, jpg or any other format when using scatter3d error
Hi,
I have been trying to output my graphs to a file (jpeg, pdf, ps, it
doesnt matter) but i cant seem to be able to get it to output. I tried a
few things but none of them worked and am lost as what to do now. I am
using the scatter3d function, and it prints out the graphs on tot he
screen without any problems, but when it comes to writing them to a file
i cant make it work. Is there any
2010 Jun 27
1
NeweyWest
I want to calculate Newey West robust standard error using NeweyWest. Comparing the results to what I get in STATA, in order to get the same results in I need to specify "prewhite=0". Can someone explain what this prewhite command means?
Thanks
[[alternative HTML version deleted]]
2006 May 08
3
GARCH SIMULATION
Hi All,
I,m trying to do a GARCH simulation in R 2.3.0 release
in Windows XP. I've seen garchsim function but that is
for garch (1,1) and ?garch gives an example for ARCH
simulation. Can anyone help me how can i extend the
help shown in ?garch to GARCH simulation? Please help
me in this regard.
Thanks,
Sumanta Basak.
2009 Mar 12
0
GARCH variance equation with dummy variables
I am estimating daily electricity prices using GARCH (1,1). What I would like to see is whether there is some kind of daily or seasonal effect in variance of the price series. For instance, variance of electricity prices might be different (higher) during weekdays as opposed to during weekend. Thus, I would like to include some dummy variables in variance equation -but I don't know how to
2009 Mar 03
0
Monte carlo simulation in fGARCH
I use fGarch package to estimate AR(1)-ARCH(1) process for a vector of returns. Then, using the estimated parameters I want to simulate 10 000 sample paths where each path has the same length as the vector of returns. So the first line of the code is: spec=garchSpec(model=list(ar= 0.440270860, omega=0.000374365,alpha=0.475446583 , mu=0, beta=0))----
The only way I can think of generating 10 000
2008 Sep 26
0
maximum likelihood
Hello,
I am trying to estimate parameters of mean reverting process with jumps given by: dp=k(mu-p)dt+sigma*dz+Jdq where dp represents change in log of price, k is reversion factor, mu is long run level of price, sigma is standard deviation, and dq equals one with probability lambda if jump occurs and 1-lambda otherwise. J is jump size with mean muj and standard deviation delta. Therefore, when
2009 Mar 02
1
(no subject)
Greetings,
I am using fGarch package to estimate and simulate GARCH models. What I would like to do is to perform Monte Carlo simulation. Unfortunately I cannot figure how to modify the code to achieve this. I use the following code to run a single simulation:
spec=garchSpec(model=list(ar= 0.440270860, omega=0.000374365,alpha=0.475446583 , mu=0, beta=0))
sim<-garchSim(spec,
2009 Mar 24
0
Unit root
I am confused by obtaining different results when testing for unit root when using different packages. I have 2625 price entries for which I want to determine whether they exhibit unit root. First I test using adf.test from tseries package by running:
> adf.test(P, k=30)
Augmented Dickey-Fuller Test
data: P
Dickey-Fuller = -4.685, Lag order = 30, p-value = 0.01
alternative hypothesis:
2012 Mar 23
2
Trying to link against libFLAC_static.lib (windows)
Hi. I'm trying to get a project linking to libFLAC_static.lib but I
get linker errors such as the following.
6>AudioDecoder.lib(CFlacDecoder.obj) : error LNK2019: unresolved
external symbol
__imp__FLAC__stream_decoder_process_until_end_of_metadata referenced
in function "protected: int __thiscall
CFlacDecoder::CreateDecoder(void)"
(?CreateDecoder at CFlacDecoder@@IAEHXZ)
2009 Feb 03
5
Large file size while persisting rpart model to disk
I am using rpart to build a model for later predictions. To save the
prediction across restarts and share the data across nodes I have been
using "save" to persist the result of rpart to a file and "load" it
later. But the saved size was becoming unusually large (even with
binary, compressed mode). The size was also proportional to the amount
of data that was used to create the
2016 Jun 14
2
Getting HTTP path-prefix to work with syslinux.efi
>> Doesn't work. Apparently the Dell UEFI PXE firmware doesn't know HTTP.
>
> There's a lot of variation. Do you have a shell option
> in your boot selections?
None of Dell OptiPlex 990 (firmware A19), 9010 (firmware A22), nor 9020
(firmware A16) seem have a built-in EFI shell option, but in all three
cases I had success running the external EFI shell from
2014 May 14
0
Bug#748052: Bug#748052: xen-hypervisor-4.3-amd64: No USB keyboard after booting into Dom0
Control: tag -1 +moreinfo
On Tue, 2014-05-13 at 08:55 -0700, Mike Egglestone wrote:
> After booting into kernel 3.13 dom0, the keyboard no longer works.
> All other aspects work, ssh is needed to login to the system to
> start working with the domU's.
> They keyboard works at the grub menu just fine, and
> works normal when booting into the non xen kernel.
I think at a minimum
2016 Jun 13
2
Getting HTTP path-prefix to work with syslinux.efi
> > Is syslinux.efi supposed to be able to handle HTTP URLs?
>
> If the underlying firmware can. Try just specifying an HTTP URL in the
> config or on the command line instead of the path-prefix option.
Doesn't work. Apparently the Dell UEFI PXE firmware doesn't know HTTP.
Somehow I was under the impression improvements from pxelinux variants
like lpxelinux were
2020 Apr 03
2
IOMMU and kernel
Yes
dmesg | grep "EFI v"
[ 0.000000] efi: EFI v2.70 by American Megatrends
On Fri, 2020-04-03 at 14:29 -0400, Jonathan Billings wrote:
> On Fri, Apr 03, 2020 at 07:37:10PM +0300, Georgios wrote:
> > Hi.
> > Im trying to set intel_iommu=on on kernel parameters at grub but
> > for
> > some reason it doesnt work.
> >
> > I edit
2015 Jun 08
2
Problem with GT218 (GeForce GT210)
Hello, I'm facing issues with a Point of View GT210/218 and nouveau
drivers. I'm using ubuntu server with LXDE on top of it...
*lshw -c video* output:
*-display
description: VGA compatible controller
product: GT218 [GeForce 210]
vendor: NVIDIA Corporation
physical id: 0
bus info: pci at 0000:01:00.0
version: a2
width: 64 bits
clock:
2009 Sep 21
4
Powerware 5115 USB Issue
Hi,
I'm trying to get a Powerware 5115 to communicate with the NUT via USB under Debian Linux and need help.
Here is the output that I see.
co-nh5:/tmp/mnt/projects/pwusb/nut-2.4.1# /usr/local/ups/bin/upsdrvctl -u root start
Network UPS Tools - UPS driver controller 2.4.1
Network UPS Tools - BCMXCP UPS driver 0.21 (2.4.1)
USB communication subdriver 0.17
Communications with UPS lost:
2007 Sep 23
2
Re: Creating a .deb file
On Sun, Sep 23, 2007 at 04:59:24PM +0200, Daniel Aleksandersen wrote:
> Share your package on http://getdeb.net/
Or just wait, like, a day for me to finish the packaging...
Patiently,
--
Joshua Kwan
2007 Sep 25
1
Re: Creating a .deb file
On Mon, Sep 24, 2007 at 04:15:51PM +0000, Andy Hawkins wrote:
> I didn't realise someone was actually packaging it up 'properly'. I'd much
> rather use an 'official' package than some home brewed one I made myself!
It's official in the sense that it is now an official Debian package.
I uploaded it yesterday. You can retrieve it from the unstable archive
and it