search for: sherbrook

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2003 Oct 31
4
dnorm() lead to a probability >1
...1] 1.329808 > dnorm(x=1, mean=1, sd=0.1) [1] 3.989423 > dnorm(x=1, mean=1, sd=0.01) [1] 39.89423 > dnorm(x=1, mean=1, sd=0.001) [1] 398.9423 Is there a bug with the algorithm? Thanks, Marc ======================== Marc B?lisle Professeur adjoint D?partement de biologie Universit? de Sherbrooke 2500 boul. de l'Universit? Sherbrooke, Qu?bec J1K 2R1 CANADA T?l: +1-819-821-8000 poste 1313 Fax: +1-819-821-8049 Courri?l: Marc.M.Belisle at USherbrooke.ca Site Web: www.usherbrooke.ca/biologie/recherche/ecologie/Belisle/belisle.html
2004 Oct 04
3
(off topic) article on advantages/disadvantages of types of SS?
...ssion and ANCOVA, especially including the use of different types of contrasts and the meaning of the hypotheses that are tested in such cases. Thanks for any leads. Bill Shipley Subject Matter Editor, Ecology North American Editor, Annals of Botany Département de biologie, Université de Sherbrooke, Sherbrooke (Québec) J1K 2R1 CANADA Bill.Shipley@USherbrooke.ca <http://callisto.si.usherb.ca:8080/bshipley/> http://callisto.si.usherb.ca:8080/bshipley/ [[alternative HTML version deleted]]
2009 Mar 12
3
avoiding termination of nls given convergence failure
...age, thus preventing the loop from continuing. Is there some what of detecting the convergence problem while preventing the nls function from stopping when this happens, so that the loop can continue? Bill Shipley North American Editor, Annals of Botany Département de biologie Université de Sherbrooke Sherbrooke (Québec) J1K 2R1 Canada (819) 821-8000, poste 62079 (819) 821-8049 FAX http://pages.usherbrooke.ca/jshipley/recherche/ [[alternative HTML version deleted]]
2006 May 24
2
changing font size in plot(effect())
...he following: > par(cex.lab=4) > plot(effect ("alti",reg8), ylab="detection probability") and > plot(effect ("alti",reg8), ylab="detection probability", cex=4) but nothing changes. Can anyone help me? thanks. Emilie Berthiaume graduate student Sherbrooke University 2500 boul. de l'Universit? Sherbrooke, Qu?bec J1K 2R1 CANADA Phone: 1-819-821-8000 poste 2059 Fax: 1-819-821-8049 emilie.berthiaume at USherbrooke.ca
2007 Apr 04
3
Power analysis and mixed model
Un texte encapsul? et encod? dans un jeu de caract?res inconnu a ?t? nettoy?... Nom : non disponible Url : https://stat.ethz.ch/pipermail/r-help/attachments/20070404/0f61f54a/attachment.pl
2008 Feb 18
2
skip non-converging nls() in a list
...n-converging use of nls() so that I can at least obtain the parameters for the curves which R can fit? Thanks for your time, Marc =================== Marc B?lisle Professeur adjoint Chaire de recherche du Canada en ?cologie spatiale et en ?cologie du paysage D?partement de biologie Universit? de Sherbrooke 2500 Boul. de l'Universit? Sherbrooke, Qu?bec J1K 2R1 Canada T?l: +1-819-821-8000 poste 61313 Fax: +1-819-821-8049 Courri?l: Marc.M.Belisle at USherbrooke.ca
2004 Aug 06
2
Speex 1.1.1 is out
...rt any difference with previous versions (both for float and fixed-point). Again, note that this is an unstable (read experimental) release and *not* production-quality code (yet). Jean-Marc -- Jean-Marc Valin, M.Sc.A., ing. jr. LABORIUS (http://www.gel.usherb.ca/laborius) Université de Sherbrooke, Québec, Canada -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 190 bytes Desc: Ceci est une partie de message numériquement signée Url : http://lists.xiph.org/pipermail/speex-dev/attachments/20031021/b920dcc...
2004 Apr 26
2
mixed model with binomial link?
..., but it doesn’t seem to allow any mixed structure beyond a simple 2-level one. Can anyone point me to the appropriate package, so that I don’t have to go to SAS? Thanks. Bill Shipley Subject Matter Editor, Ecology North American Editor, Annals of Botany Département de biologie, Université de Sherbrooke, Sherbrooke (Québec) J1K 2R1 CANADA Bill.Shipley@USherbrooke.ca <http://callisto.si.usherb.ca:8080/bshipley/> http://callisto.si.usherb.ca:8080/bshipley/ [[alternative HTML version deleted]]
2004 Sep 30
1
function by
...the function by. The data set is named "SS". I've tried this: by (SS, year, sum(SStot)) and it's not working. Is it because there's a different number of rows for each year? How else can I do this? -- Emilie Berthiaume Graduate student Biology Departement Universit?? de Sherbrooke 2500 boul. de l'Universit?? Sherbrooke, Qu??bec J1K 2R1 CANADA T??l: 1-819-821-8000 poste 2059 Fax: 1-819-821-8049 Emilie.Berthiaume at USherbrooke.ca
2004 Sep 30
1
histograms with more than one variable
...ll this a 2-d histogram? Can this be done in R? Here is a typical data.set: y group 1.2 1 3.3 1 2.4 2 5.7 1 0.2 2 etc. Bill Shipley Subject Matter Editor, Ecology North American Editor, Annals of Botany Département de biologie, Université de Sherbrooke, Sherbrooke (Québec) J1K 2R1 CANADA Bill.Shipley@USherbrooke.ca <http://callisto.si.usherb.ca:8080/bshipley/> http://callisto.si.usherb.ca:8080/bshipley/ [[alternative HTML version deleted]]
2005 Mar 02
1
Applying a function to all combinations of factors
...r each day*hour combination and obtain a matrix with day, hour and the cor value for each combination? Thanks for your time, Marc =================== Marc Bélisle Professeur adjoint Chaire de recherche du Canada en écologie spatiale et en écologie du paysage Département de biologie Université de Sherbrooke 2500 Boul. de l'Université Sherbrooke, Québec J1K 2R1 Canada Tél: +1-819-821-8000 poste 1313 Fax: +1-819-821-8049 Courriél: Marc.M.Belisle@USherbrooke.ca [[alternative HTML version deleted]]
2006 Apr 13
1
obtaining residuals from lmer
Hello. I cannot find out how to extract the residuals from a mixed model using the lmer function. Can someone help? Bill Shipley North American Editor, Annals of Botany Editor, "Population and Community Biology" series, Springer Publishing Département de biologie, Université de Sherbrooke, Sherbrooke (Québec) J1K 2R1 CANADA Bill.Shipley@USherbrooke.ca http://callisto.si.usherb.ca:8080/bshipley/ [[alternative HTML version deleted]]
2006 Mar 14
1
Ordered logistic regression in R vs in SAS
...d it ran well with an good output. So my question is: Can someone tell me what is the difference between the ordered logistic regression of R and that of SAS? Does anyone have a suggestion to help me run my program in R? Thank you very much, Emilie Berthiaume graduate student Biology Department Sherbrooke University Sherbrooke, Quebec CANADA emilie.berthiaume@USherbrooke.ca [[alternative HTML version deleted]]
2005 Nov 01
1
function effect and standard error
...0.07924610 0.06713200 0.11493178 0.13106639 0.05252749 0.04208334 My question is: Do the numbers on the second line of this output represent the standard error? What do the numbers on the top line represent? Thank you, Emilie Berthiaume graduate student Biology Departement Université de Sherbrooke 2500 boul. de l'Université Sherbrooke, Québec J1K 2R1 CANADA Tél: 1-819-821-8000 poste 2059 Fax: 1-819-821-8049 emilie.berthiaume@USherbrooke.ca [[alternative HTML version deleted]]
2006 Feb 16
1
help downloading lme4 from CRAN
...arning message: cannot open: HTTP status was `404 Not Found' Can someone please explain what I am doing wrong? Bill Shipley North American Editor, Annals of Botany Editor, "Population and Community Biology" series, Springer Publishing Département de biologie, Université de Sherbrooke, Sherbrooke (Québec) J1K 2R1 CANADA Bill.Shipley@USherbrooke.ca http://callisto.si.usherb.ca:8080/bshipley/ [[alternative HTML version deleted]]
2003 Oct 28
1
setting up complicated ANOVA in R
...; repeated-measures design? If not, can I perhaps use a mixed-model analysis with random subjects nested within the whole-plot? Any suggestions or leads are appreciated. Bill Shipley Associate Editor, Ecology North American Editor, Annals of Botany Département de biologie, Université de Sherbrooke, Sherbrooke (Québec) J1K 2R1 CANADA Bill.Shipley@USherbrooke.ca <http://callisto.si.usherb.ca:8080/bshipley/> http://callisto.si.usherb.ca:8080/bshipley/ [[alternative HTML version deleted]]
2004 Apr 01
1
nls function
...there another non-linear regression function in R that I might try (other than regression smoothers, which won’t give the parameter estimates of the specified function)? Bill Shipley Subject Matter Editor, Ecology North American Editor, Annals of Botany Département de biologie, Université de Sherbrooke, Sherbrooke (Québec) J1K 2R1 CANADA Bill.Shipley@USherbrooke.ca <http://callisto.si.usherb.ca:8080/bshipley/> http://callisto.si.usherb.ca:8080/bshipley/ [[alternative HTML version deleted]]
2003 Nov 04
3
help with lme()
...ges? Or rather, does it simply mean that one should use t or F tests for the fixed effects, and restrict the likelihood ratio tests to the random effects only if using REML? Bill Shipley Associate Editor, Ecology North American Editor, Annals of Botany Département de biologie, Université de Sherbrooke, Sherbrooke (Québec) J1K 2R1 CANADA Bill.Shipley@USherbrooke.ca <http://callisto.si.usherb.ca:8080/bshipley/> http://callisto.si.usherb.ca:8080/bshipley/ [[alternative HTML version deleted]]
2005 Jan 05
1
cubic spline smoother with heterogeneous variance.
...of Y when back-transformed) and the derivative of Ln(Y) with time (i.e. d(Ln(Y))/dt = dY/YDt), not dY/dt. Can anyone suggest the best strategy for solving this problem? Bill Shipley Subject Matter Editor, Ecology North American Editor, Annals of Botany Département de biologie, Université de Sherbrooke, Sherbrooke (Québec) J1K 2R1 CANADA Bill.Shipley@USherbrooke.ca <http://callisto.si.usherb.ca:8080/bshipley/> http://callisto.si.usherb.ca:8080/bshipley/ [[alternative HTML version deleted]]
2003 Dec 11
2
typeIII SS for lme?
...given that type III SS is also demanded by some… is there a function (equivalent to drop1 for lm) to obtain type III sums of squares for mixed models using the lme function? Bill Shipley Associate Editor, Ecology North American Editor, Annals of Botany Département de biologie, Université de Sherbrooke, Sherbrooke (Québec) J1K 2R1 CANADA Bill.Shipley@USherbrooke.ca <http://callisto.si.usherb.ca:8080/bshipley/> http://callisto.si.usherb.ca:8080/bshipley/ [[alternative HTML version deleted]]