search for: 76524532

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2008 May 09
1
str and class
...ution is to use more sensibly named attributes, but str could be made more foolproof by using attr(object, "class", exact = TRUE) instead. Best regards, Heather -- Dr H Turner Research Fellow Dept. of Statistics The University of Warwick Coventry CV4 7AL Tel: 024 76575870 Fax: 024 76524532 Url: www.warwick.ac.uk/go/heatherturner
2006 Dec 14
3
Model formula question
Hi all, I'm not familiar with R programming and I'm trying to reproduce a result from a paper. Basically, I have a dataset which I would like to model in terms of successive increments, i.e. (y denote empirical values of y) y_1 = y1, y_2 = y1 + delta1, y_3 = y1 + delta1 + delta2. ... y_m = y1 + sum_2^m delta j where delta_j donote successive increments in the y-values, i.e. delta
2008 May 09
0
Incorrect fix for PR#9316: Cook's Distance & plot.lm
...unts for the inconsistency reported in PR#9316. The solution is simply to plot the standardised Pearson residuals instead, as in the attached patch. Best regards, Heather -- Dr H Turner Research Fellow Dept. of Statistics The University of Warwick Coventry CV4 7AL Tel: 024 76575870 Fax: 024 76524532 Url: www.warwick.ac.uk/go/heatherturner
2008 May 14
0
Cook's Distance in GLM (PR#9316)
..._ again _ that the function *should* warn when points with > h_ii ~= 1 are suppressed. > That latter change is not yet committed. > > Martin Maechler, ETH Zurich -- Dr H Turner Research Fellow Dept. of Statistics The University of Warwick Coventry CV4 7AL Tel: 024 76575870 Fax: 024 76524532 Url: www.warwick.ac.uk/go/heatherturner
2008 Nov 12
1
Understanding glm family documentation: dev.resids
Hi all Consider the family function, as used by glm. The help page says the value of the family object is a list, one element of which is the following: dev.resids function giving the deviance residuals as a function of (y, mu, wt). But reading any of the family functions (eg poisson) shows that dev.resids is a function that computes the *square* of the deviance residuals (at least, by
2008 Nov 06
1
nls: Fitting two models at once?
Hello, I'm still a newbie user and struggling to automate some analyses from SigmaPlot using R. R is a great help for me so far! But the following problem makes me go nuts. I have two spectra, both have to be fitted to reference data. Problem: the both spectra are connected in some way: the stoichiometry of coefficients "cytf.v"/"cytb.v" is 1/2. {{In the SigmaPlot