similar to: GML with tweedie: AIC=NA

Dear R users; I am modelling densities of some species of birds, so I have a problem with a great ammount of zeros. I have decided to try GLMs with the tweedie family, but in all the models I have tried I got an NA for the AIC value. Just to check the problem I've compared the a glm using the Gaussian family with the identity link and a glm using the tweedie family with var.power=0 and

This is a general question about Design of experiments. If i am not allowed to post general questions like this here please accept my apologies and ignore the question. I did a DOE with six factors in eight runs. I know i cannot check for interactions using this design, but i tried the interaction plot and it showed me many interactions. After this I foldover the design and ran the 8 runs to learn

Dear users; I am doing GLMs with the Gamma distribution, and I always get errors ("no valid set of coefficients: please supply starting values") or warnings ("NaNs produced in log(x)") when I use the links identity or inverse, but I don´t get them if I use the log link. For example: >

Hi R-colleagues. In the sem-package i have a problem to introduce hidden variables. As a simple example I take an ordinary factor analysis. The program: cmat=c(0.14855886, 0.05774635, 0.08003300, 0.04900990, 0.05774635, 0.18042029, 0.11213013, 0.03752475, 0.08003300, 0.11213013, 0.24646337, 0.03609901, 0.04900990, 0.03752475, 0.03609901, 0.31702970)

Hi everybody! Is there any way to read a postscrit file into R? All the best to you Ralf Finne SYH University of Applied Sciences Vasa Finland

Hi R-users Is there any functions in R that can implement "expert systems"? The aim of an expert system is to produce a probable diagnosis for a patient with certain symptoms. In the classical expert system a mumber of "experts" are asked to make "statements" on the probabilities for different diseases when a combination of systems would appear. One typical

Hi experts! Have anybody experience in including an R-program as part of a larger system? In Matlab there is a toolbox that converts a m-script into C-code. One application in mind is that I do the model building in R, for estimating the risk for cancer based on clinical measurements. When the model is ready, a small R-program can simulate the model to estimate the risk for a new patient. The

Hello, I am exporting a graph in "gml" format from igraph 0.5.5. When I open the file in Cytoscape v.2.7 I can't map the color attribute that I assign to the graph when I export it from igraph. Could anyone help me in this? Thanks. -- Warm Regards, Sandeep Amberkar BioQuant,BQ26, Im Neuenheimer Feld 267, D-69120,Heidelberg Tel: +49-6221-5451354 [[alternative HTML version

Hi, is there anyone here who succeed to run any 3D software at good speed with such 3D hardware ? On my side, 3D accelleration is ok with Xorg and pure linux game (xmoto for example run really fine). Is there anything to do with Wine to allow programs runs under it to work as "native" Linux software ? Have I miss something somewhere ? (I think of wine compilation and especially

Hi everybody! Can anybody help me to find an R-function for the Siegel-Tukey test. Than you in advance. Ralf Finne SYH, University of Applied Sciences Vasa Finland