Displaying 9 results from an estimated 9 matches for "propto".
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propio
2008 Nov 01
2
sampling from Laplace-Normal
Hi,
I have to draw samples from an asymmetric-Laplace-Normal distribution:
f(u|y, x, beta, phi, sigma, tau) \propto exp( - sum( ( abs(lo) +
(2*tau-1)*lo )/(2*sigma) ) - 0.5/phi*u^2), where lo = (y - x*beta) and
y=(y_1, ..., y_n), x=(x_1, ..., x_n)
-- sorry for this huge formula --
A WinBUGS Gibbs sampler and the HI package arms sampler were used with the
same initial data for all parameters. I compared the mean...
2006 Feb 10
8
Fitdistr and MLE for parameter lambda of Poisson distribution
...ing a bit into the code of this
function I can see that value for lambda and its standard error is
estimated via
estimate <- mean(x)
sds <- sqrt(estimate/n)
Is this MLE? With my poor math/stat knowledge I thought that MLE for
Poisson parameter is (in mixture of LaTeX code)
l(\lambda|x) \propto \sum^n_{i=1}(-\lambda + x_iln(\lambda)).
Is this really equal to (\sum^n_{i=1} x_i) / n
--
Lep pozdrav / With regards,
Gregor Gorjanc
----------------------------------------------------------------------
University of Ljubljana PhD student
Biotechnical Faculty
Zootechnical Department...
2008 Apr 17
2
glm(quasipoisson) with non-integer response
Hi,
I have count data that have been meddled with enough to make them non
integers. Using glm(poisson) returns a "non integer" error but
glm(quasipoisson) does not. Just wondering if anyone knows if I am
violating the assumptions of a quasipoisson error structure by using
these non-integer response data?
Thanks! I'd welcome your thoughts and/or references...
Mark
1998 Sep 28
0
adding math(s) symbols to src/main/plotmath.c
...t;spadesuit", 170,
+ "biarrow", 171,
+ "leftarrow", 172,
+ "uparrow", 173,
+ "rightarrow", 174,
+ "downarrow", 175,
+ "degree", 176,
+ "plusminus", 177,
+ "gteq", 179,
+ "times", 180,
+ "propto", 181,
+ "partial", 182,
+ "bullet", 183,
+ "divide", 184,
+ "notequal", 185,
+ "equiv", 186,
+ "approx", 187,
+ "ellipsis", 188,
+ "aleph", 192,
+ "Imaginary", 193,
+ "Real", 194,
+...
2011 Mar 16
2
Re; Fitting a Beta distribution
I want to fit some p-values to a beta distribution. But the problem is some
of the values have 0s and 1's. I am getting an error if I use the MASS
function to do this. Is there anyway to get around this?
--
Thanks,
Jim.
[[alternative HTML version deleted]]
2023 Oct 31
1
weights vs. offset (negative binomial regression)
...set of log(Effort) as in your second model is the more
> standard way to approach this problem; it corresponds to assuming that
> catch is strictly proportional to effort. Adding log(Effort) as a
> covariate (as illustrated below) tests whether a power-law model (catch
> propto (Effort)^(b+1), b!=0) is a better description of the data.? (In
> this case it is not, although the confidence intervals on b are very
> wide, indicating that we have very little information -- this is not
> surprising since the proportional range of effort is very small
>...
2010 Jun 04
7
Wrong symbol rendering in plots (Ubuntu)
Hi I am having problems with the rendering of scientific symbols (mu and
degree) in my plots. Whenever I use these symbols they are rendered
changed (mu is changed to the proportionality symbol and degree is
changed to something resembling a gamma) in the X-device. If I make a
pdf of the plot and open the file in Evince or Okular symbols are also
rendered wrong, however if I open the file
2010 Jun 04
7
Wrong symbol rendering in plots (Ubuntu)
Hi I am having problems with the rendering of scientific symbols (mu and
degree) in my plots. Whenever I use these symbols they are rendered
changed (mu is changed to the proportionality symbol and degree is
changed to something resembling a gamma) in the X-device. If I make a
pdf of the plot and open the file in Evince or Okular symbols are also
rendered wrong, however if I open the file
2010 Jun 04
7
Wrong symbol rendering in plots (Ubuntu)
Hi I am having problems with the rendering of scientific symbols (mu and
degree) in my plots. Whenever I use these symbols they are rendered
changed (mu is changed to the proportionality symbol and degree is
changed to something resembling a gamma) in the X-device. If I make a
pdf of the plot and open the file in Evince or Okular symbols are also
rendered wrong, however if I open the file