Displaying 20 results from an estimated 2000 matches similar to: "nonlinear fitting documentation error (PR#9749)"
2004 Sep 10
0
[fsblk@aurora.uaf.edu: Bug#138828: flac: strange decode output]
retitle 138828 flac: progress display is broken with long filenames
thanks
I don't think it's a gnome-terminal issue, as I've seen the same behaviour
with xterm in the past. I've never bothered doing anything about it because
it seems to be purely cosmetic; the operation still completes successfully.
I'm forwarding this bug upstream.
----- Forwarded message from Britton Leo
2004 Sep 10
0
packaging flac for debian
The users of debian have been without high quality lossless audio
compression too long, I say. I am therefore packaging flac for debian.
Having your program debian packaged is a great new source of bug reports
(both forwarded from me where appropriate and sent in directly from
misguided users when I screw up :), so I thought I'd say hello now.
Also, I haven't packaged a library before,
2013 Jun 23
1
2SLS / TSLS / SEM non-linear
Dear all, I try to conduct a SEM / two stage least squares regression with
the following equations:
First: X ~ IV1 + IV2 * Y
Second: Y ~ a + b X
therein, IV1 and IV2 are the two instruments I would like to use. the
structure I would like to maintain as the model is derived from economic
theory. My problem here is that I have trouble solving the equations to get
the reduced form so I can run
2004 Apr 18
2
lm with data=(means,sds,ns)
Hi Folks,
I am dealing with data which have been presented as
at each x_i, mean m_i of the y-values at x_i,
sd s_i of the y-values at x_i
number n_i of the y-values at x_i
and I want to linearly regress y on x.
There does not seem to be an option to 'lm' which can
deal with such data directly, though the regression
problem could be algebraically
2010 Feb 06
1
Canberra distance
Hi the list,
According to what I know, the Canberra distance between X et Y is : sum[
(|x_i - y_i|) / (|x_i|+|y_i|) ] (with | | denoting the function
'absolute value')
In the source code of the canberra distance in the file distance.c, we
find :
sum = fabs(x[i1] + x[i2]);
diff = fabs(x[i1] - x[i2]);
dev = diff/sum;
which correspond to the formula : sum[ (|x_i - y_i|) /
2007 Feb 01
3
Help with efficient double sum of max (X_i, Y_i) (X & Y vectors)
Greetings.
For R gurus this may be a no brainer, but I could not find pointers to
efficient computation of this beast in past help files.
Background - I wish to implement a Cramer-von Mises type test statistic
which involves double sums of max(X_i,Y_j) where X and Y are vectors of
differing length.
I am currently using ifelse pointwise in a vector, but have a nagging
suspicion that there is a
2001 Mar 05
1
Canberra dist and double zeros
Canberra distance is defined in function `dist' (standard library `mva') as
sum(|x_i - y_i| / |x_i + y_i|)
Obviously this is undefined for cases where both x_i and y_i are zeros. Since
double zeros are common in many data sets, this is a nuisance. In our field
(from which the distance is coming), it is customary to remove double zeros:
contribution to distance is zero when both x_i
2001 Mar 05
1
Canberra dist and double zeros
Canberra distance is defined in function `dist' (standard library `mva') as
sum(|x_i - y_i| / |x_i + y_i|)
Obviously this is undefined for cases where both x_i and y_i are zeros. Since
double zeros are common in many data sets, this is a nuisance. In our field
(from which the distance is coming), it is customary to remove double zeros:
contribution to distance is zero when both x_i
2018 Jan 17
1
mgcv::gam is it possible to have a 'simple' product of 1-d smooths?
I am trying to test out several mgcv::gam models in a scalar-on-function regression analysis.
The following is the 'hierarchy' of models I would like to test:
(1) Y_i = a + integral[ X_i(t)*Beta(t) dt ]
(2) Y_i = a + integral[ F{X_i(t)}*Beta(t) dt ]
(3) Y_i = a + integral[ F{X_i(t),t} dt ]
equivalents for discrete data might be:
1) Y_i = a + sum_t[ L_t * X_it * Beta_t ]
(2) Y_i
2010 Feb 05
3
metafor package: effect sizes are not fully independent
In a classical meta analysis model y_i = X_i * beta_i + e_i, data
{y_i} are assumed to be independent effect sizes. However, I'm
encountering the following two scenarios:
(1) Each source has multiple effect sizes, thus {y_i} are not fully
independent with each other.
(2) Each source has multiple effect sizes, each of the effect size
from a source can be categorized as one of a factor levels
2018 Mar 15
3
stats 'dist' euclidean distance calculation
Hello,
I am working with a matrix of multilocus genotypes for ~180 individual snail samples, with substantial missing data. I am trying to calculate the pairwise genetic distance between individuals using the stats package 'dist' function, using euclidean distance. I took a subset of this dataset (3 samples x 3 loci) to test how euclidean distance is calculated:
3x3 subset used
2004 Dec 15
2
how to fit a weighted logistic regression?
I tried lrm in library(Design) but there is always
some error message. Is this function really doing the
weighted logistic regression as maximizing the
following likelihood:
\sum w_i*(y_i*\beta*x_i-log(1+exp(\beta*x_i)))
Does anybody know a better way to fit this kind of
model in R?
FYI: one example of getting error message is like:
> x=runif(10,0,3)
> y=c(rep(0,5),rep(1,5))
>
2010 Apr 27
2
Curve Fitting/Regression with Multiple Observations
I recently came to realize the true power of R for statistical
analysis -- mainly for post-processing of data from large-scale
simulations -- and have been converting many of existing Python(SciPy)
scripts to those based on R and/or Perl.
In the middle of this conversion, I revisited the problem of curve
fitting for simulation data with multiple observations resulting from
repetitions.
In the
2005 Jun 15
2
need help on computing double summation
Dear helpers in this forum,
This is a clarified version of my previous
questions in this forum. I really need your generous
help on this issue.
> Suppose I have the following data set:
>
> id x y
> 023 1 2
> 023 2 5
> 023 4 6
> 023 5 7
> 412 2 5
> 412 3 4
> 412 4 6
> 412 7 9
> 220 5 7
> 220 4 8
> 220 9 8
> ......
>
Now I want to compute the
2007 Mar 01
1
covariance question which has nothing to do with R
This is a covariance calculation question so nothing to do with R but
maybe someone could help me anyway.
Suppose, I have two random variables X and Y whose means are both known
to be zero and I want to get an estimate of their covariance.
I have n sample pairs
(X1,Y1)
(X2,Y2)
.
.
.
.
.
(Xn,Yn)
, so that the covariance estimate is clearly 1/n *(sum from i = 1 to n
of ( X_i*Y_i) )
But,
2010 Apr 25
1
function pointer question
Hello,
I have the following function that receives a "function pointer" formal parameter name "fnc":
loocv <- function(data, fnc) {
n <- length(data.x)
score <- 0
for (i in 1:n) {
x_i <- data.x[-i]
y_i <- data.y[-i]
yhat <- fnc(x=x_i,y=y_i)
score <- score + (y_i - yhat)^2
}
score <- score/n
2006 Apr 13
1
ICH7 SATA RAID Broken, Was (Re: Timescale for 6.1-RELEASE...)
On 4/12/06, Ted Mittelstaedt <tedm@toybox.placo.com> wrote:
>
> >-----Original Message-----
> >From: Ted Mittelstaedt [mailto:tedm@toybox.placo.com]
> >Sent: Tuesday, April 11, 2006 6:04 PM
> >To: Nikolas Britton
> >Cc: Harrison Peter CSA BIRKENHEAD; freebsd-questions@freebsd.org
> >Subject: RE: Timescale for 6.1-RELEASE...
> >
>
2010 Dec 15
4
Generacion de binomiales correlacionadas
Buenas tardes,
Estoy interesado en generar observaciones de una distribucion binomial
bivariada en la que hay _cierto_ grado de correlacion (denotemoslo rho).
Podria por favor alguien indicarme como hacerlo en R?
Este es el contexto. Supongamos que se tienen dos experimentos en los que la
variable respuesta _sigue_ una distribucion binomial, i.e., X_i
~Binomial(n_i, p_i), i=1,2 y que, por ahora,
2008 Dec 01
1
linear functional relationships with heteroscedastic & non-Gaussian errors - any packages around?
Hi,
I have a situation where I have a set of pairs of X & Y variables for
each of which I have a (fairly) well-defined PDF. The PDF(x_i) 's and
PDF(y_i)'s are unfortunately often rather non-Gaussian although most
of the time not multi--modal.
For these data (estimates of gas content in galaxies), I need to
quantify a linear functional relationship and I am trying to do this
as
2018 Mar 15
0
stats 'dist' euclidean distance calculation
> 3x3 subset used
> Locus1 Locus2 Locus3
> Samp1 GG <NA> GG
> Samp2 AG CA GA
> Samp3 AG CA GG
>
> The euclidean distance function is defined as: sqrt(sum((x_i - y_i)^2)) My
> assumption was that the difference between