Displaying 20 results from an estimated 700 matches similar to: "NLS -- multiplicative errors and group comparison"
2004 Apr 19
1
specifying as.svrepdesign with odd number PSUs
Is there a way to create a BRR svrepdesign from a survey design when the number of PSUs is odd in one or more stratum? Creating a JKn svrepdesign with that condition works okay, but when I tried to create a svrepdesign with type="BRR" I get an error and this message:
"Can't split with odd numbers of PSUs in a stratum"
I get that message when I tell it to merge the
2006 May 24
1
problem-nlme
Hi,
I have great problems with my work in R.
I look for to model the growth of fish.
I have "Longitudinal data", a serie of repeated
measures for each individual.
Using the corresponding packages "nlme" in R.
I treat to fit to the data different growth functions,
wich were entered by me.
Unfortunately for no it was arrived at the
convergence, several error messages appeared.
I
2006 Jan 27
1
how calculation degrees freedom
Hi, I' m having a hard time understanding the computation of degrees of freedom when runing nlme() on the following model:
> formula(my data.gd)
dLt ~ Lt | ID
TasavB<- function(Lt, Linf, K) (K*(Linf-Lt))
my model.nlme <- nlme (dLt ~ TasavB(Lt, Linf, K),
data = my data.gd,
fixed = list(Linf ~ 1, K ~ 1),
start = list(fixed = c(70, 0.4)),
na.action= na.include,
2012 Sep 10
0
More help need on Von Bertalanffy Growth Curves
Howdy,
Last week I got some great help on why I was getting an error code when trying to run this model, thanks everyone! I was able to get the code up and running beautifully for several data sets. Now I am getting different errors with this new data set. I can't figure out why, I have more data points with this species, and it is ordered exactly the same as the other species I have been
2006 Jan 26
0
degrees freedom in nlme
I'm having hard time understanding the computation of degrees of freedom when runing nlme () on the following model:
> formula(my data.gd)
dLt ~ Lt | ID
TasavB<- function(Lt, Linf, K) (K*(Linf-Lt))
my model.nlme <- nlme (dLt ~ TasavB(Lt, Linf, K),
data = my data.gd,
fixed = list(Linf ~ 1, K ~ 1),
start = list(fixed = c(70, 0.4)),
na.action= na.include,
2001 Sep 07
3
fitting models with gnls
Dear R-list members,
Some months ago I wrote a message on the usage of gnls (nlme library) and here I come again.
Let me give an example:
I have a 10 year length-at-age data set of 10 fishes (see growth.dat at the end of this message) and I want to fit a von Bertalanffy growth model, Li= Linf*(1-exp(-k*(ti-t0))) where Li = length at age i, Linf= asymptotic length, k= curvature parameter, ti=
2006 Mar 30
1
Predict function for 'newdata' of different dimension in svm
I am using the "predict" function on a support vector machine (svm)
object, and I don't understand why I can't predict on a dataset with more
observations than the training dataset.
I think this problem is a generic "predict" problem, but I'm not sure.
The original svm was fit on 50 observations.
2007 Jun 14
1
R programming question
Dear All.,
I've created R-code for which a user will be asked to choose between 2
analyses. I've written one function for each type of analysis. Within
each function, the users is prompted to enter information. An example
is:
cat("Enter value for lower Linf :\n")
L1<-scan(n=1)
cat("Enter value for upper Linf :\n")
L2<-scan(n=1)
2006 Sep 19
0
R package for MALDI-TOF data pre-processing
Dear R user,
Is there any well-developed R package for pre-processing MALDI-TOF or
SELDI-TOF data besides PROcess? The package should be able to perform
denoising, baseline correction, normalization, spectrum
alignment/calibration, peak identification and binning. Thank you.
Deming Mi
1999 Aug 30
0
Problems browsing from W98 on campus network with samba domain master
On my campus network, there's one wins server that can see every machine
on every subnet.
I want to provide access to all these computers to the W98 boxes in my
workgroup. So here's what I did:
I created my own workgroup, set myself to be the local browse master and
domain master. So now everything works properly on my linux box (rh 6.0,
samba 2.0.5a) and the W98 boxes in my workgroup
2003 Jun 20
1
Power Law Exponents
I am having difficulty with the calculation of the power law exponent
for set of nodes within a graph.
Specifically, I am interested in the distribution of in-degree and
out-degree among communities of web pages where the web pages are the
nodes of the graph and the hyperlinks the edges.
According to the literature, the distribution of incoming and outgoing
links obeys a power law distribution
2008 Aug 01
1
Confidence intervals with nls()
I have data that looks like
O.lengthO.age
176 1
179 1
182 1
...
493 5
494 5
514 5
606 5
462 6
491 6
537 6
553 6
432 7
522 7
625 8
661 8
687 10
704 10
615 12
(truncated)
with a simple VonB growth model from within nls():
plot(O.length~O.age, data=OS)
Oto = nls(O.length~Linf*(1-exp(-k*(O.age-t0))), data=OS,
start=list(Linf=1000, k=0.1, t0=0.1), trace=TRUE)
mod <- seq(0, 12)
2014 Apr 26
3
[Bug 10568] New: --copy-links Fails if link name has more than 32 chars
https://bugzilla.samba.org/show_bug.cgi?id=10568
Summary: --copy-links Fails if link name has more than 32 chars
Product: rsync
Version: 3.0.4
Platform: All
OS/Version: Linux
Status: NEW
Severity: critical
Priority: P5
Component: core
AssignedTo: wayned at samba.org
ReportedBy: levy.david
2008 Sep 02
2
nls.control()
All -
I have data:
TL age
388 4
418 4
438 4
428 5
539 10
432 4
444 7
421 4
438 4
419 4
463 6
423 4
...
[truncated]
and I'm trying to fit a simple Von Bertalanffy growth curve with program:
#Creates a Von Bertalanffy growth model
VonB=nls(TL~Linf*(1-exp(-k*(age-t0))), data=box5.4,
start=list(Linf=1000, k=0.1, t0=0.1), trace=TRUE)
#Scatterplot of the data
plot(TL~age, data=box5.4,
2003 Jun 02
1
Help - Curvature measures of nonlinearity
Dear colleagues,
Von Bertalanffy model is commonly adjust to data on fish length (TL) and age (AGE)
TL= Linf*(1-exp(-K*(AGE-t0)). Linf, K and t0 are parameters of the model.
One main goal of the growth study is the comparison of growth parameter estimates between sexes of the same species, or estimates from different populations.
The realibility statistical tests normally applied are highly
2010 Sep 30
1
getting the output after bootstraping
Thanks to the help of people from this forum I was able to bootstrap my data
and then apply a model to it. Thanks for all your help.
Everything worked out well, but I am having a difficult time getting the new
parameter values. I bootstrapped the data 300 times and I want to get the
300 sets of parameter estimates and plot them in Excel.
Here is my code:
2008 Jun 10
3
newbie nls question
I'm tyring to fit a relatively simple nls model to some data, but keep coming up against the same error (code follows):
Oto=nls(Otolith ~ Linf*(1-exp(-k(AGE-to))),
data = ages,
start = list(Linf=1000, k=0.1, to=0.1),
trace = TRUE)
The error message I keep getting is "Error in eval(expr, envir, enclos) : could not find function "k"". I've used this
2010 Sep 29
2
fitting model to resampled data
I apologize if this comes across as confusing. I will try to explain my
situation as best I can.
I have R bootstrapping my growth data for fish. It's resampling my database
of age and length data and then produces several new datasets for me. In
this case, it's resampling my data to create three new datasets of age and
length data. Here is my code with my original data called
2005 Mar 29
2
Stalled response from icecast to ices
Icecast 1.3.12
IceS 0.3
Linshout 2.0/2.1 tried
Linux 2.6.7
VIA C3 architechure
Hi. I have found a very interesting problem with the above setup. Icecast
starts up fine, but when I try to connect with iceS I get no response.
I've straced iceS and the last word comes from icecast, but waiting for
more. Icecast mentions nothing during this process, but show a quick
connect/lost connection when
2014 Oct 31
4
[PATCH] builder: move the gpgkey_type type from Sigchecker to Utils
No functional change, just code motion.
---
builder/builder.ml | 6 +++---
builder/list_entries.ml | 12 ++++++------
builder/list_entries.mli | 2 +-
builder/sigchecker.ml | 5 -----
builder/sigchecker.mli | 7 +------
builder/utils.ml | 5 +++++
6 files changed, 16 insertions(+), 21 deletions(-)
diff --git a/builder/builder.ml b/builder/builder.ml
index