Displaying 20 results from an estimated 300 matches similar to: "Problem about Box-Cox transformation (topic in html form)"
2010 Aug 14
3
How to perform a substitution in a loop?
Hello all:
I have a data series of 500 data, and I want to limit the value of it to be
less than 1.
Below is my code:
>for (i in 1:500)
+if( x[i] > 1)
+x[i] = 1
but the system told me it's wrong. Can anyone told me the reason?
-----
------------------------------------------------------------------
Saji Ren
from Shanghai China
GoldenHeart Investment Group
2010 Jan 17
1
Confusion in 'quantile' and getting rolling estimation of sample quantiles
Guys:
1).When I using the 'quantile' function, I get really confused. Here is what
I met:
> x<-zoo(rnorm(500,0,1))
> quantile(x,0.8)
400
1.060258
> c=rnorm(500,0,1)
> quantile(c,0.8)
80%
0.9986075
why do the results display different? Is that because of the different type
of the class?
2).And I want to use the 'rollapply' function to compute a
2010 Jan 03
6
Help with function "fitdistr" in "MASS"
Hi, R users:
I want to fit my data into a normal distribution by using the command
"fitdistr" in "MASS".
I changed my data class from "ts" to "numeric" by
>class(mydata)="numeric"
but after using "fitdistr", I got the result below
>fitdistr(mydata,"normal")
mean sd
NA NA
(NA) (NA)
the help doc of
2009 Nov 27
2
How to compute Rolling analysis of Standard Deviation using ZOO package?
Hello:
I want to get a rolling estimation of the stdev of my data.
Searching the document, I found the function "rollapply" in the zoo package.
For example, my series is "c", and i want get a period of 10 days,
so i write the command below:
roll.sd = rollapply( c, 10, sd, na.pad = TRUE, align = 'right' )
but there is an error in it ,and the computing cannot be
2009 Feb 03
3
Problem about SARMA model forcasting
Hello, Guys:
I'm from China, my English is poor and I'm new to R. The first message I sent to R help meets some problems, so I send again.
Hope that I can get useful suggestions from you warm-hearted guys.
Thanks.
I builded a multiplicative seasonal ARMA model to a series named "cDownRange".
And the order is (1,1)*(0,1)45
The regular AR=1; regular MA=1; seasonal AR=0; seasonal
2008 Aug 01
8
Sharing home directories between two symetric nodes?
Hello,
I just discovered Gluster a couple of weeks ago and went through the
initial documentation and got it compiled.
It looks very promising both for my home network and for work.
For now I'm concentrating at home -
We have to Ubuntu 8.04 desktops, one for me and one for my wife.
We generally try to keep them off when not used but at any time any
one of them could be up or down.
I was
2014 Oct 21
1
Samba member server behavior if WAN down ?
Hello,
we are trying to use samba 3.6 over a big network with multiple xdsl
link (512Kbit to 10 Mbits not symetric).
We have a main site with two domain controlers (Windows 2k8 R2) and
about one hundred middle sites with samba member servers.
We have a big issue with Active Directory (AD) ACL which disapear when
member server (powered by samba and winbind)
can't discuss (for network
2002 Mar 11
1
Spectral decomposition
Hello all,
I have the square symetric matrix A:
2 1 1
1 2 1
1 1 2
My first question is what is the easiest way to enter this matriz in R?
Second, matrix A has an eigenvalue with multiplicity 2, in this case, how
could I find the two related ortogonal eigenvectors given below by R,
without the help of R, I mean, I want to know how R calculate this
eigenvectors related to the same eigenvalue.
2004 Jun 14
1
error running sammon
Hello,
I am inputing a 17 x 17 symetric matrix to sammon. The matrix is a co-occurance matrix with no missing data. If this is at all relevant, running hclust on this matrix works.
> samx <- sammon(q23axproduct)
I receive the following error:
Error in sammon(q23axproduct) : initial configuration must be complete
In addition: Warning messages:
1: some of the first 2 eigenvalues are
2005 Oct 02
1
question for some tests
Hi! I come from Poland, and my English is not as good as it should be, so I have to apologize for my mistakes.
I would like to ask you for a package, where I can find a test, which is named The Test Of Series (in Poland). In econometric models we use this test to check if the residuals are completely random ( I mean with destiny). And one more thing - I would like to know where I can find a test
2007 May 10
1
Significance test for discrete data
Hello,
given situation:
- pre / post test comparison of discrete, paired data [values can be
1,2,3,4].
- the data are neither normal distributed nor symetric
Which test should I use to calculate the p-value? Is the wilcoxon rank sum
test ok ?
Alex
2016 Oct 10
2
[test-suite] making polybench/symm succeed with "-Ofast" and "-ffp-contract=on"
Hi,
I would need some help to fix polybench/symm:
void kernel_symm(int ni, int nj,
DATA_TYPE alpha,
DATA_TYPE beta,
DATA_TYPE POLYBENCH_2D(C,NI,NJ,ni,nj),
DATA_TYPE POLYBENCH_2D(A,NJ,NJ,nj,nj),
DATA_TYPE POLYBENCH_2D(B,NI,NJ,ni,nj))
{
int i, j, k;
DATA_TYPE acc;
/* C := alpha*A*B + beta*C, A is symetric */
for (i = 0; i < _PB_NI; i++)
for (j = 0; j < _PB_NJ; j++)
{
2014 Nov 10
2
outside ssh connection from two different ISP's
I have both cable and dsl service. The router attached to the cable service is 192.168.0.1 and the router attached to the dsl service is 192.168.0.254. I determine which service my computers communicate through by setting the gateway assignment to either of those addresses and it just works.
I can connect to my computers from the outside by port forwarding from my routers to the computer that I
2003 Sep 24
10
SIP / GrandStream Configuration
Hi there!
I installed the BudgetTone (GrandStream) on my LAN without any problems.
Then, I moved it to another location using a D-Link NAT.
I opened 5060 (SIP) and 5000 to 5008 for RTP. I also fixed the IP address
of the BudgetTone.
When I receive a call on my Asterisk, it would ring my FXS as before.
However, after I pick up, it hangs within a few seconds (Hungup Zap1-1 in
the log).
The
2010 May 27
1
Glusterfs over wan?
Hello !
sorry for english, but, just don't understand why glusterfs is not
destinated to be used over the wan ?
I think that if the files are tiny, there's no problem to use this
solution over wan.. ?
But okay, if file are large.. (don't know .. 100MB - 200MB and more.) i
understand that it depend of the internet connection and that's the
replication can be so soo soo slow..
2009 Feb 17
0
How to simulate a seasonal ARIMA model in R?
Guys:
Is it possible to simulate a seasonal ARIMA model in R?
Which package can do this job?
saji from Shanghai
2009 Feb 17
0
What's the predict procedure of ARIMA in R?
Hello,guys:
Recently, I am working on a seasonal ARIMA model. And I met some problem in the forecasting.
Now I just want to know that How does R perform the predict procedure(the predict formula, the initial setting of errors,etc.)?
I run the following commands and get the original code of the "predict" command, but I can't read it.
Can anybody explain it to me?
Thanks!
saji from
2006 Jun 19
4
Looking for tips about Physical Migration on XEN
Hi people.
Im new on Xen and I''m looking in how to do a physical migration on Xen. I
know that there is a lot of choices (that is the first problem)
My environment is simple:
2 physical servers, each one running one instance of XEN. Each host has 2
gigabit cards. One to talk with the world, other to talk between
theirselves.
I want to run the every vm on the both hosts, if one fail
2014 Dec 17
3
Asymmetric encryption for very large tar file
Am 17.12.2014 um 18:42 schrieb Les Mikesell <lesmikesell at gmail.com>:
> On Wed, Dec 17, 2014 at 11:14 AM, Xinhuan Zheng
> <xzheng at christianbook.com> wrote:
>> I have a requirement that I need to use encryption technology to encrypt
>> very large tar file on a daily basis. The tar file is over 250G size and
>> those are data backup. Every night the server
2003 Apr 22
4
fisher exact vs. simulated chi-square
Dear All,
I have a problem understanding the difference between the outcome of a
fisher exact test and a chi-square test (with simulated p.value).
For some sample data (see below), fisher reports p=.02337. The normal
chi-square test complains about "approximation may be incorrect",
because there is a column with cells with very small values. I
therefore tried the chi-square with