Displaying 20 results from an estimated 2000 matches similar to: "Counterintuitive Simulation Results"
2004 Sep 04
0
Non-Markovian Behaviour of a Cusum?
Can someone help me understand simulations of a one-sided Cusum?
Consider the following:
Q[i] = max(0, Q[i-1]+z[i]), z[i] ~ N(offset, 1), with Q[0] = FIR
(fast initial response).
With offset < 0, mean{Q[i] for fixed i averaged over many
simulations} approaches an asymptote as i -> Inf. In simulations with
abs(offset) small and FIR close to the asymptote, Q[i]
2017 Dec 01
1
Do we really need Solr commit as cronjob?
I am testing Solr FTS on dovecot. Read online that some suggested to run
cronjob commit every minute, and optimize once a day.
I am using Solr 7.1.0 and I see some configurations:
In /etc/default/solr.in.sh:
#SOLR_OPTS="$SOLR_OPTS -Dsolr.autoSoftCommit.maxTime=3000"
#SOLR_OPTS="$SOLR_OPTS -Dsolr.autoCommit.maxTime=60000"
Also in solrconfig.xml:
??? <autoCommit>
2016 Apr 25
0
use switch or function in connecting different cases.
This is my current work.Now i am trying to use a function to do the normal distribution simulation.
rm(list=ls())
t <- u<- mann<- rep(0, 45)
Nsimulation<-function(S1,S2,Sds,nSims)
{
set.seed(1)
for (sim in 1:nSims)
{
matrix_t <-matrix(0,nrow=nSims,ncol=3)
matrix_u<-matrix(0,nrow=nSims,ncol=3)
2016 Apr 25
2
R: use switch or function in connecting different cases.
HI, I am trying to use switch () function to connect the three distribution (normal ,gamma with equal skewness and gamma with unequal skewness.
But i am losing my ideas since i have
sample sizes-(10,10),(10,25),(25,25),(25,50),(25,100),50,25),(50,100), (100,25),(100,100)
standard deviation ratio- (1.00, 1.50, 2.00, 2.50, 3.00 and 3.50)
distribution of gamma distribution with unequal skewness
2003 Oct 28
1
error message in simulation
Dear R-users,
I am a dentist (so forgive me if my question looks stupid) and came across
a problem when I did simulations to compare a few single level and two
level regressions.
The simulations were interrupted and an error message came out like 'Error
in MEestimate(lmeSt, grps) : Singularity in backsolve at level 0, block 1'.
My collegue suggested that this might be due to my codes
2014 Jun 04
2
error de incompatible methods
Hola Daniel, si perdona di a responder directamente y no me di cuenta.
Ya se donde esta el error, pero queria preguntar si a puede ser que mi R
funcione mal o algo porque esta manhana ejecute mi script y funciono
perfectamente y ahora volvi a ejecutarlo y me volvio a dar el mismo
problema de ayer , despues de reiniciar y demas el tinnR y el R, no se si
me vacila o es que tengo algo mal en
2010 Mar 29
1
Trying to get reason for ending of AGI call recording
I would appreciate any ideas of what I'm doing wrong on this. My
dialplan calls an AGI which records a file. That works, but I'm trying
to find a way to determine whether the caller pressed # to stop a
recording before the maxtime expired, or if the recording ended due to
reaching the max timeout. The $fx variable in the below agi excerpt
always returns 0.
$res =
2006 Sep 24
1
[patch] buffer overflow in q_parser.y
Hi Dave,
The patch below corrects a buffer overflow bug in q_parser.y. Since it
is triggered by excessively long query strings, I believe that this bug
could be exploited to allow arbitrary code execution if a query string
supplied by a user is passed in directly to Ferret and not truncatated.
If I''m right, you should consider a new release asap.
I''ve fixed it to simply
2014 Jul 09
3
error com un archivo
Hola a todos,
Me gustaria pedir vuestra ayuda a encontrar el error que no consigo
encontrar en este archivo. He revisado todo mil veces y probado y no doy
con ello.Adjunto el archivo con Google drive porque es muy grande.
?
monicap_50.csv
<https://docs.google.com/file/d/0B8o2KrPEgG7ATlBMc19lTVk1d3M/edit?usp=drive_web>
?
Este es el script, y lo que no entiendo que pasa es que tengo 592044
2014 Jun 03
3
error de incompatible methods
Hola!!
Estoy intentando ejecutar un script com horas, al principio ejecute estos
comandos
DBx$Date<-strptime(DBx$Date, "%d-%m-%Y") ###Monicap use ; other
use Y
DBx$Year<-as.POSIXlt(DBx$Date)$year+1900
if(filename!="monicap_50.csv") {DBx$Time<-paste(DBx$Time, ":00", sep="")}
Pero me daba el error de que mi base de datos tenia las
2019 Apr 23
3
SolrCore 'dovecot' is not available due to init failure: fieldType 'text_general' not found in the schema
https://wiki.dovecot.org/Plugins/FTS/Solr
Only offers a solr-7.7.0 solrconfig.xml, does it apply to solr-8.0.0?
On Tue, Apr 23, 2019 at 11:18 AM luckydog xf <luckydogxf at gmail.com> wrote:
> Here is solrconfig.xml, I removed comments.
> --------------------
>
> <?xml version="1.0" encoding="UTF-8"?>
> <config>
>
2016 Apr 17
2
R [coding : do not run for every row ]
i have combined all the variables in a matrix, and i wish to conduct a simulation row by row.
But i found out the code only works for the every first row after a cycle of nine samples.
But after check out the code, i don know where is my mistake...
can anyone pls help ....
#For gamma disribution with equal skewness 1.5
#to evaluate the same R function on many different sets of data
2007 Dec 22
1
using solve.qp without a quadratic term
I was playing around with a simple example using solve.qp ( function is in the quadprog package ) and the code is below. ( I'm not even sure there if there is a reasonable solution because I made the problem up ).
But, when I try to use solve.QP to solve it, I get the error that D in the quadratic function is not positive
definite. This is because Dmat is zero
because I don't have a
2023 Aug 31
1
simulating future observations from heteroscedastic fits
Hello, All:
I want to simulate future observations from fits to heteroscedastic
data. A simple example is as follows:
(DF3_2 <- data.frame(y=c(1:3, 10*(1:3)),
gp=factor(rep(1:2, e=3))))
# I want to fit 4 models
# and simulate future observations from all 4:
fit11 <- lm(y~1, DF3_2)
fit21 <- lm(y~gp, DF3_2)
library(nlme)
(fit12 <- lme(y~1, data=DF3_2,
2016 Apr 18
0
R [coding : do not run for every row ]
Dear anonymous,
The big mistake in the output might be obvious to you but not to
others. Please make clear what the correct output should be or at
least what is wrong with the current output.
And please DO read the posting guide which asks you not to post in HTML.
ir. Thierry Onkelinx
Instituut voor natuur- en bosonderzoek / Research Institute for Nature
and Forest
team Biometrie &
2016 Apr 18
3
R [coding : do not run for every row ]
Hi, i am sorry, the output should be values between 0 and 0.1 and not supposed to be 1.00, it is because they are type 1 error rate. And now i get output 1.00 for several samples,rhis is no correct. The loop do not run for every row. i do not know where is my mistake. As i use the same concept on normal distribution setup, i get the result.
Sent from my phone
On Thierry Onkelinx
2009 Feb 16
2
solve.QP with box and equality constraints
Dear list,
I am trying to follow an example that estimates a 2x2 markov transition
matrix across several periods from aggregate data using restricted least
squares.
I seem to be making headway using solve.QP(quadprog) as the unrestricted
solution matches the example I am following, and I can specify simple
equality and inequality constraints. However, I cannot correctly specify a
constraint
2008 Feb 15
2
Quadratic Programming
Hi,
I am using solve.QP (from quadprog) to solve a standard quadratic
programming problem: min_w -0.5*w'Qw st ... I would like solve.QP to do two
things: 1) to start the optimization from a user-supplied initial
condition; i.e., from a vector w_0 that satisfies the constraints, and 2) to
return the values of the lagrange multiplieres associated with the
constraints. I did not find an obvious
2006 Jun 06
1
Problems using quadprog for solving quadratic programming problem
Hi,
I'm using the package quadprog to solve the following quadratic programming problem.
I want to minimize the function
(b_1-b_2)^2+(b_3-b_4)^2
by the following constraints b_i, i=1,...,4:
b_1+b_3=1
b_2+b_4=1
0.1<=b_1<=0.2
0.2<=b_2<=0.4
0.8<=b_3<=0.9
0.6<=b_4<=0.8
In my opinion the solution should be b_1=b_2=0.2 und b_3=b_4=0.8.
Unfortunately R doesn't find
2010 Dec 04
1
Quadratic programming with semi-definite matrix
Hello.
I'm trying to solve a quadratic programming problem of the form min
||Hx - y||^2 s.t. x >= 0 and x <= t using solve.QP in the quadprog
package but I'm having problems with Dmat not being positive definite,
which is kinda okay since I expect it to be numerically semi-definite
in most cases. As far as I'm aware the problem arises because the
Goldfarb and Idnani method first