search for: leafmin

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2003 Sep 02
1
Plotting dates
I'm trying to plot observations against observation dates and getting julian dates along the x-axis: library(date) Week<-as.date(c("05/02/03","05/09/03","05/16/03","05/23/03","05/30/03","06/0 7/03","06/14/03")) Leafminers<-c(0,2,5,10,4,6,5) Diglyphus<-c(0,0,4,5,7,3,1) LeafDig<-cbind(Week,Leafminers,Diglyphus) plot(LeafDig,ylim=c(0,20),main="Leafminers",ylab="Observed numbers",xlab="",adj=0,bty="l") points(Diglyphus,pch=2) lines(Diglyphus,lty=2) legend(1,18,c("...
2006 Apr 23
1
Comparing GLMMs and GLMs with quasi-binomial errors?
...from the MASS library(after using the 'cbind()' command on the two columns with total number of leaves per seedling and number of leaves attacked by that herbivory category) - and then compared these models to GLMs without the random effect. ## model example1: leaf mines GLMM proportion.leafmines <- cbind(leaves.affected, total.leaves - leaves.affected) leafminesGLMM <- glmmPQL(proportion.leafmines ~ PLATEAU * DISTANCE, random=~1| TreeID, family=binomial(link=logit)) ##AIC(leafminesGLMM) = 474.773 ## model example2: leaf mines GLM leafminesGLM <- glm(proportion.leafmines ~...