Displaying 20 results from an estimated 80 matches similar to: "Fwd: Re: Wavelet reconstruction"
2012 Nov 08
0
mirt vs. eRm vs. ltm vs. winsteps
Dear R-List,
I tried to fit a partial credit model using the "pcmdat" from eRm-package comparing the results of mirt, eRm, ltm and winsteps.
The results where quite different, though. I cannot figure out what went wrong and I do not know which result I can rely on.
This is what I did in R
library(mirt)
#load(file="u3.RData")
2009 Apr 01
2
repeated measures ANOVA - among group differences
I have data on the proportion of clutches experiencing different fates
(e.g., 4 different sources of mortality) for 5 months . I need to test 1)
if the overall proportion of these different fates is different over the
entire study and 2) to see if there are monthly differences within (and
among) fate types. Thus, I am pretty sure this is an RM analysis -( I
measure the same quadrats each month).
2005 Dec 10
2
quantile regression problem
Dear List members,
I would like to ask for advise on quantile regression in R.
I am trying to perform an analysis of a relationship between species abundance
and its habitat requirements -
the habitat requirements are, however, codes - 0,1,2,3... where 0<1<2<3
and the scale is linear - so I would be happy to treat them as continuos
The analysis of the data somehow does not work, I am
2008 Apr 19
1
resampling from distributions
Hello All,
Once again thanks for all of the help to date. I am climbing my R learning
curve. I've got a few more questions that I hope I can get some guidance on
though. I am not sure whether the etiquette is to break up multiple
questions or not but I'll keep them together here for now as it may help put
the questions in context despite the fact that the post may get a little
long.
2009 Mar 18
0
Wavelet reconstruction with coefficients set to zero
Dear all:
Greetings from Mumbai, India.
Reference?R help solution [Rogerio, Thu 16 Nov 2006 - 20:54:25 GMT].
Simonsen, Jensen and Johansen (2002) [arXiv:cond-mat/0202352v1] note
"(.wavelet filtered was...) achieved?by first transforming the
log-price [...] to the?wavelet-domain, setting all wavelet coefficient
corresponding?to scales larger then 1000 trading days to zero, and
finally
2008 Feb 17
1
where to look for file reconstruction
Hello all,
Thanks for all the ideas. I liked the remote to remote idea and have told my
guide about it.
Anyways, can anybody tell me which files to look into, if I want to look at
the code for file reconstruction. I have studied Dr. Tridgell's thesis on
the Rsync Algorithm and have understood the working of the algorithm. Now, I
am trying to read the code to understand it better.
Any help
2007 Dec 30
2
Patch: fragment reconstruction MMX for GCC
Hi again,
I measured my fragment reconstructions against the compiler output from
GCC and well - the new codes perform better, so I brushed up my gcc
inline assembler skills and made a port.
Code is here: http://torus.untergrund.net/code/mmxfrag.c
All routines perform much better now. Inter2 alone got a speedup of
factor 5 on Pentium-M. Athlon CPU's execute roughly 3 times faster.
2005 Apr 28
2
Reconstruction of a "valid" expression within a function
Hello all,
I have some trouble in reconstructing a valid expression within a
function,
here is my question.
I am building a function :
SUB<-function(DF,subset=TRUE) {
#where DF is a data frame, with Var1, Var2, Fact1, Fact2, Fact3
#and subset would be an expression, eg. Fact3 == 1
#in a first time I want to build a subset from DF
#I managed to, with an expression like eg. DF$Fact3,
# but I
2011 Mar 18
0
apply function returning different results
For some reason when I apply a function to a single row in R it works, but
when that same row is in a data.frame it does not, see below:
apply(dx[954,], 1, query.db)
2571
1092 0.06044147
3890 0.05948577
3273 0.05911261
794 0.05855583
4241 0.05854064
3560 0.05602690
apply(dx[954:955,], 1, query.db)
$`2571`
numeric(0)
$`1194`
908 3754 5119 2835
2010 May 21
2
Data reconstruction following PCA using Eigen function
Hi all,
As a molecular biologist by training, I'm fairly new to R (and statistics!),
and was hoping for some advice. First of all, I'd like to apologise if my
question is more methodological rather than relating to a specific R
function. I've done my best to search both in the forum and elsewhere but
can't seem to find an answer which works in practice.
I am carrying out
2005 Jun 23
0
how to reconstruct the discriminant funciton from lda$prior, $means and $scaling
Hi R folks,
How can I generate the discriment function from lda?
I have an unbalanced data set. one class has about 25
entries and another class has about 200 entries.
I used lda for classification
> z<- lda(V3 ~ V1+V2, data)
> z
Prior probabilities of groups:
0 1
0.91111111 0.08888889
Group means:
V1 V2
0 0.4445161 0.04723951
1 0.4058900
2018 Apr 22
0
Reconstructing files from shards
Il 20/04/2018 21:44, Jamie Lawrence ha scritto:
> Hello,
>
> So I have a volume on a gluster install (3.12.5) on which sharding was enabled at some point recently. (Don't know how it happened, it may have been an accidental run of an old script.) So it has been happily sharding behind our backs and it shouldn't have.
>
> I'd like to turn sharding off and reverse the
2018 Apr 23
0
Reconstructing files from shards
Il 22/04/2018 11:39, Gandalf Corvotempesta ha scritto:
> Il dom 22 apr 2018, 10:46 Alessandro Briosi <ab1 at metalit.com
> <mailto:ab1 at metalit.com>> ha scritto:
>
> Imho the easiest path would be to turn off sharding on the volume and
> simply do a copy of the files (to a different directory, or rename
> and
> then copy i.e.)
>
> This
2018 Apr 22
0
Reconstructing files from shards
So a stock ovirt with gluster install that uses sharding
A. Can't safely have sharding turned off once files are in use
B. Can't be expanded with additional bricks
Ouch.
On April 22, 2018 5:39:20 AM EDT, Gandalf Corvotempesta <gandalf.corvotempesta at gmail.com> wrote:
>Il dom 22 apr 2018, 10:46 Alessandro Briosi <ab1 at metalit.com> ha
>scritto:
>
>> Imho
2018 Apr 23
1
Reconstructing files from shards
2018-04-23 9:34 GMT+02:00 Alessandro Briosi <ab1 at metalit.com>:
> Is it that really so?
yes, i've opened a bug asking developers to block removal of sharding
when volume has data on it or to write a huge warning message
saying that data loss will happen
> I thought that sharding was a extended attribute on the files created when
> sharding is enabled.
>
> Turning off
2005 Oct 11
0
Reconstructing duplicate lvm
Hi All,
Basically, I have an upgrade script for a system that breaks md mirrors and
then constructs a chroot from the broken off members (i.e in this case
partitions on /dev/sdb) and does the upgrade in this chroot. The end result
is that until the reboot applications on this system can remain running
while the chroot is being updated (much hand waving at this point).
This works fine if LVM
2005 Jun 27
2
Reconstructing LD function
Dear all,
in an LDA analysis with n groups n-1 LD functions result. Implicitly this
defines an LD fucntion for the last group. Does there exist code already
to explictly construct this LD function?
Thanks, Stefan
2011 Oct 04
0
number of analogs in significance test of MAT reconstructions using randomTF from palaeoSig
I'm trying to use the randomTF function from package palaeoSig to
test the significance of a MAT reconstruction with nine analogs and a
WA-PLS reconstruction with four components. I'm probably missing
something obvious here but how do I make sure that randomTF is testing
the reconstruction based on the desired number of analogs / components?
In:
fitmap.wapls = WAPLS( lumapspc,
2005 Mar 01
3
Reconstructing Datasets
Hi,
Is it possible to recreate "smoothed" data sets in R, by performing a PCA
and then reconstructing a data set from say the first 2/3 EOFs?
I've had a look in the help pages and don't seem to find anything
relevant.
Thanks in advance,
Laura
Laura Quinn
Institute of Atmospheric Science
School of Earth and Environment
University of Leeds
Leeds
LS2 9JT
tel: +44 113 343 1596
2018 Apr 22
4
Reconstructing files from shards
Il dom 22 apr 2018, 10:46 Alessandro Briosi <ab1 at metalit.com> ha scritto:
> Imho the easiest path would be to turn off sharding on the volume and
> simply do a copy of the files (to a different directory, or rename and
> then copy i.e.)
>
> This should simply store the files without sharding.
>
If you turn off sharding on a sharded volume with data in it, all sharded