search for: analysis_

Displaying 10 results from an estimated 10 matches for "analysis_".

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2017 May 30
3
stats::line() does not produce correct Tukey line when n mod 6 is 2 or 3
...9;ed, wrote an R interface function found problems i.e., bugs, including infinite loops, fixed most AFAICS, but somehow did not finish making the result available. Yes, and I have too many other things on my desk... this will have to wait! References: Tukey, J. W. (1977). _Exploratory Data Analysis_, Reading Massachusetts: Addison-Wesley. Velleman, P. F. and Hoaglin, D. C. (1981) _Applications, Basics and Computing of Exploratory Data Analysis_ Duxbury Press. Emerson, J. D. and Hoaglin, D. C. (1983) Resistant Lines for y versus x. Chapter 5 of _Understanding Robust...
2017 May 30
2
stats::line() does not produce correct Tukey line when n mod 6 is 2 or 3
>>>>> Serguei Sokol <sokol at insa-toulouse.fr> >>>>> on Mon, 29 May 2017 15:28:12 +0200 writes: > Sorry, I have seen it too late that we had different tab > width in the original file and my editor. Here is the > patch with all white spaces instead of mixing tabs and > white spaces. thank you - it still gives quite a few
2006 May 18
2
Running a likelihood ratio test for a logit model
Hi all -- I have to calculate a likelihood ratio test for a logit model. I found logLik, but I need to calculate the log likelihood for the model without any predictors. How can I specify this in glm? If the full model is glm(y ~ x1), is the one without predictors (y ~ 0)? Or (y ~ 1)? Is there a more direct way of getting this? -- Chris
2005 May 30
2
"FANNY" function in R package "cluster"
...tering function in R (Kaufman & Rousseeuw, 1990), found in the "cluster" package. I have run into a variety of difficulties; the two most crucial difficulties are enumerated below. 1. Where is the 'm' parameter in FANNY? In _Finding Groups in Data: An Introduction to Cluster Analysis_ (1990) by Kaufman & Rousseeuw, the authors discuss the FANNY algorithm. On pages 189-190, they attempt to demonstrate an equivalence between Fuzzy c-Means (FCM) and FANNY. In doing so they, appear to be assuming that the value of the 'm' parameter in FCM (a measure of the fuzziness) is...
2004 May 26
0
AW: Question
A small comment: The code of Agnes is written in Fortran. Following book give more details: Kaufman, L. and Rousseeuw, P.J. (1990). _Finding Groups in Data: An Introduction to Cluster Analysis_. Wiley, New York. The 'hclust' function is based an Algorithm contributed to STATLIB by F. Murtagh and the code is written in C. Probably the differences between agnes and hclust causes from the different code and the different implementation. Matthias > -----Urspr??ngliche Nachricht...
2009 Jul 30
1
Logistic regression and R
Hello everybody :-) I have some data that I want to model with a logistic regression, most of the independent variables are numeric and the only dependent is categorical, I was thinking that I could apply a logistic regression using glm but I wanted to deepen my knowledge of this so I tried to do some reading and found the "iris" dataset, now I would like to ask two things, first
2005 Aug 04
1
linkage disequilibrium
Dear all, I'm using the package "Genetics", and I'm interested in the computation of D' statistics for Linkage Disequilibrium, for which the LD() command has been realised. Unfortunately I don't find any reference on "how" the D' is computed by the LD() function. In the package documentation it is generally referred as "MLE" estimation, but
2004 Mar 11
0
Subselect package - Version 0.7.1
...le in subdirectory 'inst' documenting changes since Version 0.1. BIBLIOGRAPHY: 1) Cadima, J., Cerdeira, J. Orestes and Minhoto, M. (2004) Computational aspects of algorithms for variable selection in the context of principal components. To appear in _Computational Statistics & Data Analysis_ (Special Issue on Applications of Optimization Heuristics to Estimation and Modelling Problems). 2) Cadima, J. and Jolliffe, I.T. (2001). Variable Selection and the Interpretation of Principal Subspaces, _Journal of Agricultural, Biological and Environmental Statistics_, Vol. 6, 62-79. 3) Duarte...
2004 Mar 11
0
Subselect package - Version 0.7.1
...le in subdirectory 'inst' documenting changes since Version 0.1. BIBLIOGRAPHY: 1) Cadima, J., Cerdeira, J. Orestes and Minhoto, M. (2004) Computational aspects of algorithms for variable selection in the context of principal components. To appear in _Computational Statistics & Data Analysis_ (Special Issue on Applications of Optimization Heuristics to Estimation and Modelling Problems). 2) Cadima, J. and Jolliffe, I.T. (2001). Variable Selection and the Interpretation of Principal Subspaces, _Journal of Agricultural, Biological and Environmental Statistics_, Vol. 6, 62-79. 3) Duarte...
2005 Sep 12
5
remedial stats education
In short: I didn't take enough stats courses in college. Now I am working on scientific research and I feel somewhat lost when it comes to designing the statistical framework. I have looked through the books at: http://www.r-project.org/doc/bib/R-books.html I even tried to read [17] Julian J. Faraway. Linear Models with R. This book is too advanced. It helped a little bit but I still