Displaying 7 results from an estimated 7 matches for "_statistical".
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statistical
2010 Jul 20
1
Servreg $loglik
...r the 70 unweighted observations.
(For the record, my computations of the loglikelihood, using the dweibull()
function for the observations and the pweibull() function for the censored
observations, is -135.1527 for both 37 weighted and 70 unweighted.)
I am using the data from Meeker and Escobar, _Statistical Methods for
Reliability Data_, Wiley (1998), Table C.1, shown below:
Hours Status Num.Parts
450 Failure 1
460 R-Censored 1
1150 Failure 2
1560 R-Censored 1
1600 Failure 1
1660 R-Censored 1
1850 R-Censored 5
2030 R-Censored 3
2070 Failure 2
2080 Failure 1
2200 R-Censored 1
3000 R-Cens...
2003 Nov 25
5
Parameter estimation in nls
I am trying to fit a rank-frequency distribution with 3 unknowns (a, b
and k) to a set of data.
This is my data set:
y <- c(37047647,27083970,23944887,22536157,20133224,
20088720,18774883,18415648,17103717,13580739,12350767,
8682289,7496355,7248810,7022120,6396495,6262477,6005496,
5065887,4594147,2853307,2745322,454572,448397,275136,268771)
and this is the fit I'm trying to do:
nlsfit
2003 Sep 04
1
scatter.smooth error
Hello
When I run
scatter.smooth(jitter(weight), jitter(height2), span = .25, evaluation
= 50, pch = '.')
I get the type of graph I thought I would get, but also a warning.....
k-d tree limited by memory. ncmax= 528
I always get concerned when there are warnings I don't understand.
What's a k-d tree? Is this something to be concerned about?
Thanks
Peter
Peter L. Flom,
2006 Dec 07
0
FW: test of spatial dependence?? - ask a geographer (was ask an ecologist)?
No, you do not necessarily need the XY coordinates. You can also use polygon
(field, in your case) adjacency information. See Rogerson, Peter A. 2001.
_Statistical methods for geography_. Thousand Oaks: Sage.
You might also look at GeoDA, a free and soon-to-be open source spatial
analysis package. For your application, it might be easier to use than R. Go
to https://www.geoda.uiuc.edu/.
Marshall Feldman
Center for Urban Studies and Research
The Universit...
2006 Apr 11
1
Specifying an appropriate error term in a hierarchical regression
Hi all --
So I'm working through my statistics homework again, and trying to
reproduce the examples in the book (Kirk's _Experimental Design_,
third edition) in R. This is a completely randomized hierarchical
design (CRH-28(A)). The B factor is completely nested within the A
factor. Pages 480-482, for those playing along at home.
I can use:
summary(aov(value ~ a + Error(b),
2005 Sep 02
1
partial association model
my last post was filtered,so I post it again with another title.
If I do not make a mistake,the partial association model is an
extension of log-linear model.I read a papers which gives an example
of it.(Sloane and Morgan,1996,An Introduction to Categorical Data
Analysis,Annual Review of Sociology.22:351-375) Can R fit such partial
association model?
ps:Another somewhat off-topic
2008 Jul 05
2
Bland-Altman method to measure agreement with repeated measures
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