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...t; 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

...uding 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]]

...om 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]]

...g8), 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

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...arameters 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

...y 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]]

...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

...s 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]]

...r 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]]

...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]]

...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]]

...P 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]]

...ot, 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]]

...on 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]]

...ean 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]]

...he 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]]

...manded 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]]

...el contained in id, as lmList would do... 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

...terminology. At least, this is the case with normal (i.e. not mixed) linear models. However, he finds very different results of these two types of ANOVA tables. Why? 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/> http://pages.usherbrooke.ca/jshipley/recherche/ [[alternative HTML version deleted]]