Displaying 15 results from an estimated 15 matches similar to: "problems formulating arguments to lme()"
2001 Nov 20
0
Formulating anova for partially nested model
Hello,
I'm trying to analyse data from an incomplete design with four factor :
- fr : number of the batch
- op : ID of operator
- meth : method used
- mat : nature of the material used
and one variable
- mv : mesure
- trmv : transformed mesure
str(matvol)
`data.frame': 120 obs. of 6 variables:
$ fr : Factor w/ 30 levels "1","2","3","4",..:
2017 Jan 04
0
Formulating Advanced Queries with Xapian-Omega
On Thu, Dec 29, 2016 at 05:44:50PM +0100, Giulio Teslano wrote:
> a. What other types of extended wild card(s) options are there ?
>
> or is this still currently limited to these two characters '*?' ?
As I said, the branch "adds support for arbitrary glob-style wildcard
patterns (where * matches 0 or more characters and ? a single
2003 Jul 18
3
question about formulating a nls optimization
Dear list,
I'm migrating a project from Matlab to R, and I'm
facing a relatively complicated problem for nls. My
objective function is below:
>> objFun <- function(yEx,xEx,tEx,gamma,theta,kappa){
yTh <- pdfDY(xEx,tEx,gamma,theta,kappa)
sum(log(yEx/yTh)^2)
}
The equation is yTh=P(xEx,tEx) + noise.
I collect my data in:
>> data <-
2016 Dec 22
1
Formulating Advanced Queries with Xapian-Omega
Hello,
We have Xapian-Omega installed (Linux) and working in default mode and
have
browsed several interesting pages on the main site, at trac.xapian.org
(the wiki) and in the mailing list. Having tested various search
options
(up to now only for Omega) we would like to ask a couple of questions.
1. Is it possible to search for Patterns of Text with Omega and/or
Xapian Queries ?
2016 Dec 29
2
Formulating Advanced Queries with Xapian-Omega
To Olly Betts:
Thank you very much for any feedback.
I apologise for this belated reply and also for the fact that the text
of the previous posting appeared fragmented, due to its fixed
chars/line format.
With reference to:
> Can, or could, one construct a query so that Omega (Xapian) can
handle
> this ?
>
> ... perhaps with some type of Regex ?
>
> It would seem
2017 Jul 12
0
How to formulate quadratic function with interaction terms for the PLS fitting model?
Dear all,
I am using the pls package of R to perform partial least square on a set of
multivariate data. Instead of fitting a linear model, I want to fit my
data with a quadratic function with interaction terms. But I am not sure
how. I will use an example to illustrate my problem:
Following the example in the PLS manual:
## Read data
data(gasoline)
gasTrain <- gasoline[1:50,]
## Perform
2006 Dec 28
0
lmer: Interpreting random effects contrasts and model formulation
I'm trying to fit a nested mixed model using lmer and have some
questions about the output and my model formulations.
I have replicate measures on Lines which are strictly nested within
Populations.
(a) So if I want to fit a model where Line is a random effect and
Populations are fixed and the random Line effect is constant across
Populations, I have:
measure_ijk = mu + P_i + L_ij +
2010 Dec 06
1
How to formulate constraint like abs(x) = y in constrOptim (or other)
Hello list reader,
I am trying to form some constraints for an optimization I am working on.
I think I have understand the use of the constraints in matrix form. I use
them like:
constr_mat<- -diag(2)
constr_vec<- rep(-0.05,2)
constr_mat<- rbind(constr_mat, diag(2))
constr_vec<- c(constr_vec, rep(-1, 2))
To get parameters in the interval [-1, 0.05]. (And this works so far)
Now I
2005 Jan 03
0
LME-glmmPQL formulation
Hi all -
R2.0.1 on OSX;MASS library;nlme library
I am trying to emulate the solution to a problem set that has normally
been run in Genstat, using R. The problem that I am having at the
moment is with the following glmm question (using glmmPQL from the MASS
library):
"We have two different forest habitats (first rotation thicket, and
high forest) which we want to survey for the
2011 Jun 13
0
How to formulate an (effect-modifying) interaction with matching variable in a conditional logistic regression?
Hi,
I would like to see if a matching variable is an effect-modifier in a
conditional logistic regression. Naturally, the matching variable
can't enter directly in the model but as an interaction with terms
that are in.
However, I have problems in formulating the correct model the term
that's already in the model is a factor. I am using treatment
contrasts and the problem is that if I
2006 May 11
1
model formulation for the following ANOVA
Hallo!
I have run a EEG experiment and got the following data
group: 1 2 1 2 1 2 1 2 ... as factor, 2 levels between subjects fixed effect (patient vs control)
subj: 1 2 ... 14 1 2 ... 14 as factor 7 patients 7 control random effect
condition: 1 1 ... 2 2 ... 1 1 ... 2 2 as factor, 2 levels within subjects, ie every subject worked on every cond fixed effect
roi: 1 ... 2 ... 3 ... 4 ... as factor,
2017 Jul 13
0
How to formulate quadratic function with interaction terms for the PLS fitting model?
Below.
-- Bert
Bert Gunter
On Thu, Jul 13, 2017 at 3:07 AM, Luigi Biagini <luigi.biagini at gmail.com> wrote:
> I have two ideas about it.
>
> 1-
> i) Entering variables in quadratic form is done with the command I
> (variable ^ 2) -
> plsr (octane ~ NIR + I (nir ^ 2), ncomp = 10, data = gasTrain, validation =
> "LOO"
> You could also use a new variable
2017 Jul 13
3
How to formulate quadratic function with interaction terms for the PLS fitting model?
I have two ideas about it.
1-
i) Entering variables in quadratic form is done with the command I
(variable ^ 2) -
plsr (octane ~ NIR + I (nir ^ 2), ncomp = 10, data = gasTrain, validation =
"LOO"
You could also use a new variable NIR_sq <- (NIR) ^ 2
ii) To insert a square variable, use syntax I (x ^ 2) - it is very
important to insert I before the parentheses.
iii) If you want to
2017 Jul 16
0
How to formulate quadratic function with interaction terms for the PLS fitting model?
??
If I haven't misunderstood, they are completely different!
1) NIR must be a matrix, or poly(NIR,...) will fail.
2) Due to the previously identified bug in poly, degree must be
explicitly given as poly(NIR, degree =2,raw = TRUE).
Now consider the following example:
> df <-matrix(runif(60),ncol=3)
> y <- runif(20)
> mdl1 <-lm(y~df*I(df^2))
> mdl2
2017 Jul 16
2
How to formulate quadratic function with interaction terms for the PLS fitting model?
> On Jul 13, 2017, at 7:43 AM, Bert Gunter <bgunter.4567 at gmail.com> wrote:
>
> Below.
>
> -- Bert
> Bert Gunter
>
>
>
> On Thu, Jul 13, 2017 at 3:07 AM, Luigi Biagini <luigi.biagini at gmail.com> wrote:
>> I have two ideas about it.
>>
>> 1-
>> i) Entering variables in quadratic form is done with the command I
>>