Displaying 20 results from an estimated 866 matches for "xi".
2010 Apr 09
0
rjags syntax error
...you
reply.
Thanks!
Chris
JAGS model ...
model {
for(i in 1:N){
##########################
# measurement equation model
##########################
for(j in 1:P){
y[i,j]~dnorm(mu[i,j],psi[j])
}
##########################
# alp[i] corresponds to the intercepts
##########################
mu[i,1]<-xi[i,1]+alp[1] ## Ext1
mu[i,2]<-lam[1]*xi[i,1]+alp[2]
mu[i,3]<-lam[2]*xi[i,1]+alp[3]
mu[i,4]<-xi[i,2]+alp[4] ## Soc1
mu[i,5]<-lam[3]*xi[i,2]+alp[5]
mu[i,6]<-lam[4]*xi[i,2]+alp[6]
mu[i,7]<-xi[i,3]+alp[7] ## Aca1
mu[i,8]<-lam[5]*xi[i,3]+alp[8]
mu[i,9]<-lam[6]*xi[i,3]+alp[9]
mu[i...
2009 Mar 03
1
SPSS data import: problems & work arounds for GSS surveys
...e PASEI
6: In read.spss("gss-pspp.sav", to.data.frame = T) :
gss-pspp.sav: File contains duplicate label for value 99.9 for variable MASEI
7: In read.spss("gss-pspp.sav", to.data.frame = T) :
gss-pspp.sav: File contains duplicate label for value 99.9 for variable SPSEI
8: In xi >= z[1L] | xi <= z[2L] | xi[xi == z[3L]] :
longer object length is not a multiple of shorter object length
9: In xi >= z[1L] | xi <= z[2L] | xi[xi == z[3L]] :
longer object length is not a multiple of shorter object length
10: In xi >= z[1L] | xi <= z[2L] | xi[xi == z[3L]] :...
2013 May 16
2
R looping help
...groups of variables that are all in one dataset.
This is the code:
#Stand counter
st<-1
#Collections
stands<-numeric(67)
slopes<-numeric(67)
intercepts<-numeric(67)
mses<-numeric(67)
rsquares<-numeric(67)
pValues<-numeric(67)
#Start lists for X and Y values within each stand
xi<-numeric(0)
yi<-numeric(0)
#Set the first element to the starting X and Y values
xi[1]=X[1]
yi[1]=Y[1]
#Start looping working through your data, record by record
for (i in 2:length(X)) {
#If you are in the same stand as on the last record, continue to
#collect X and Y values
if(Stand[i]...
2010 Oct 03
1
Johnson Distribution Fit
Hi,
I am trying to fit a Johnson SB distribution using fitdist function in
fitdistrplus Library. I have defined the Johnson SB distribution from (
http://www.ntrand.com/johnson-sb-distribution/) . But it gives me the
follwing errors. Any help would be appreciated
#xi = xi
#lambda =l
#delta =d
#gamma = g
djohn = function(x,xi,l,d,g)
(d/(l*sqrt(2*pi)*((x-xi)/l)*(1-((x-xi)/l))))*exp[-0.5*(g +
d*log(((x-xi)/l)/(1-((x-xi)/l))))^2]
pjohn = function(x,xi,l,d,g) pnorm(g + d*log(((x-xi)/l)/(1-((x-xi)/l))))
qjohn = function(p,xi,l,d,g) xi + (l*exp((qnorm(p) - g)/d...
2008 Oct 23
1
distribution fitting
...ted, right?
The real problems come out when I try to fit a General Pareto distribution.
Using the same method, I calculated the negative log likelihood function for
the General Pareto distribution:
> # negative log-likelihood function for general pareto distribution
> nll_gpd <- function(xi, log_sigma, mu) { # shape, scale, location
+ n <- length(interarrival_times)
+ x <- interarrival_times
+ cat("xi:",xi,"; log_sigma:",log_sigma,"; mu:",mu,"\n")
+ n*log_sigma + (xi+1)*sum(log(1+xi*(x-mu)/exp(log_sigma)))/x...
2011 Dec 02
1
1.6x speedup for requal() function (in R/src/main/unique.c)
...else if (R_IsNA(REAL(x)[i]) && R_IsNA(REAL(y)[j])) return 1;
else if (R_IsNaN(REAL(x)[i]) && R_IsNaN(REAL(y)[j])) return 1;
else return 0;
}
/* Between 1.34x and 1.37x faster on my 64-bit Ubuntu laptop */
static int requal2(SEXP x, int i, SEXP y, int j)
{
double xi, yj;
if (i < 0 || j < 0) return 0;
xi = REAL(x)[i];
yj = REAL(y)[j];
if (!ISNAN(xi) && !ISNAN(yj)) return xi == yj;
if (R_IsNA(xi) && R_IsNA(yj)) return 1;
if (R_IsNaN(xi) && R_IsNaN(yj)) return 1;
return 0;
}
/* Another extra 1.18x...
2009 Aug 24
2
[] for R
I am assuming the variable out is the output parameter.
However, I don't understand what is out[1+xi*xx>0]?
Can someone explain this to me?
Thanks in advance,
Chen
dGEV <- function(x, xi, mu = 0, sigma = 1, logvalue=FALSE)
{
xx <- (x-mu)/sigma
#use the new dGumbel which passes mu and sigma:
#if (xi==0) out <- dGumbel(xx,logvalue=TRUE)-log(sigma)
if (xi==0) {...
2007 Dec 11
1
R computing speed
Dear helpers,
I am using R version 2.5.1 to estimate a multinomial logit model using my
own maximum likelihood function (I work with share data and the default
function of R cannot deal with that).
However, the computer (I have an Athlon XP 3200+ with 512 GB ram) takes
quite a while to estimate the model.
With 3 categories, 5 explanatory variables and roughly 5000 observations it
takes 2-3 m...
2006 Dec 02
0
fixup for debug package and R2.4.0
...= integer()))
nms <- names(allargs)
if (is.null(nms))
nms <- character(length(allargs))
cl <- NULL
perm <- rows <- rlabs <- vector("list", n)
nrow <- 0
value <- clabs <- NULL
all.levs <- list()
for (i in 1:n) {
xi <- allargs[[i]]
nmi <- nms[i]
if (is.matrix(xi))
allargs[[i]] <- xi <- as.data.frame(xi)
if (inherits(xi, "data.frame")) {
if (is.null(cl))
cl <- oldClass(xi)
ri <- attr(xi, "row.names&quo...
2006 Jun 26
0
[PATCH - proposed] XI Shadow Page Table Mechanism
A post last week contained the design document for a shadow page
table mechanism. This post contains more information, and a pointer
to the code.
As a recap, the "XI Shadow Mechanism" is a design for shadow
page table code for fully virtualized HVM domains running on a 64-bit
Xen hypervisor.
This work was undertaken to address a number of goals. These are
enumerated in the document posted last week and include:
- ability to run fully virtualized 32, 32P...
2012 Oct 16
4
how to extract from list
Hi all,
I have a list of 20000 data, and the list look like below. I wonder what is
the simplest way to extract 'kappa' value (or 'xi' or 'alpha' for the
matter) from each of the data. How can I simply code it without having to
change the list to a dataframe first? Many thanks!
$X19997
xi alpha kappa
784.7718640 165.4065141 -0.2709599
$X19998
xi alpha kappa
860.7832604 21...
2007 Jan 12
0
Minor logical bug in rbind.data.frame ?
...3 x
4 d 4 y
5 a 5 x
6 e 6 z
> ## All is fine.
## Third data frame has a different third column variable
> fifi <- data.frame(v1 = c('a', 'e'), v2 = c(9, 10), v4 = ordered(c('y', 'z')))
> rbind(foo, bar, fifi)
Error in match.names(clabs, names(xi)) : names do not match previous names:
v4
> ## Output looks fine.
## Third data frame is missing a column.
> gaga <- data.frame(v1 = c('a', 'e'), v2 = c(7, 8))
> rbind(foo, bar, gaga)
Error in paste(nmi[nii == 0], collapse = ", ") :
object "nii" n...
2016 Mar 17
3
Xi has a new home
Hi,
The automatic package builder Xi has moved to system within the Dovecot
infrastructure. This also means that the repositories are available at a
new host name: xi.dovecot.fi. The old host name still works and is a
CNAME pointing to the new venue. I expect the old domain to be active
for years to come. So, there is no need to u...
2016 Mar 17
3
Xi has a new home
Hi,
The automatic package builder Xi has moved to system within the Dovecot
infrastructure. This also means that the repositories are available at a
new host name: xi.dovecot.fi. The old host name still works and is a
CNAME pointing to the new venue. I expect the old domain to be active
for years to come. So, there is no need to u...
2024 Feb 29
1
[EXT] Initializing vector and matrices
...length
of x until x1 is produced in the first of the loop. Thanks.
Steven
On 2/28/2024 6:22 PM, Eik Vettorazzi wrote:
> Hi Steven,
> It's not entirely clear what you actually want to achieve in the end.
>
> As soon as you "know" x1, and assuming that the different "xi" do not
> differ in length in the real application, you know the length of the
> target vector.
> Instead of the loop, you can use 'Reduce' without having to initialize
> a starting vector.
>
> # generate sample vectors, put them in a list
>
> xi<-lapply(1...
2006 Mar 01
1
a strange problem with integrate()
Dear all,
I am stuck on the following problem with integrate(). I have been out of
luck using RSiteSearch()..
My function is
g2<-function(b,theta,xi,yi,sigma2){
xi<-cbind(1,xi)
eta<-drop(xi%*%theta)
num<-exp((eta + rep(b,length(eta)))*yi)
den<- 1 + exp(eta + rep(b,length(eta)))
result=(num/den)*exp((-b^2)/sigma2)/sqrt(2*pi*sigma2)
r=prod(result)
return(r)
}
And I am interested...
2009 Feb 11
2
[PATCH 0/2] ocfs2: two fixes for xattr
Hi,
For EAs data structure in inode/block are little different from them in
bucket. These two patches try to make them same for the most part.
The first patch set xh_free_start and xh_name_value_len when EAs in
inode/block. xh_free_start is useful to keep the minimum offset of the
xattr name/value. But xh_name_value_len is not very useful because we
don't have "hole" when EAs in
2008 Sep 25
1
grid.newpage()
Hi,
I'm trying to customize a window with 2 graphs.
I'm able to do the first one with something like this general example
par(mfrow=c(1,2),cex.axis=0.85,cex.lab=0.80,mai=c(1.3,1,0.5,0),las=3)
bplot<-barplot(bar.values,names.arg=cf.names,width=0.5,ylab="% Area held")
abline(h=0.3,lty=3,col="red")
abline(h=0.1,lty=3,col="blue")
points(bplot,target$target/xi[nrow(xi),],pch=20)
text(bplot,target$target/xi[nrow(xi)...
2009 Feb 16
3
[PATCH 0/2] ocfs2: two fixes for xattr -v2
Hi,
I have fixed the problems in version 1 patches. These two patches based
on the latest main line kernel.
Thanks,
tiger
> For EAs data structure in inode/block are little different from them in
> bucket. These two patches try to make them same for the most part.
>
> The first patch set xh_free_start and xh_name_value_len when EAs in
> inode/block. xh_free_start is useful to
2010 Apr 27
1
TikzDevice and texi2dvi
Dear All,
I am starting to use the tikzDevice package, but I am experiencing some
(minor problems).
If I try to run the script at the end of the email, I get the following
error
Error in tools::texi2dvi("normal.tex", pdf = T) :
Running 'texi2dvi' on 'normal.tex' failed.
Messages:
sh: /usr/bin/texi2dvi: not found
How do I install the missing texi2dvi?
I found some reference to it at
http://bit.ly/bSYbxk
but I have not understood well whether it is should already be...