search for: parasitoides

Hi all, I have scoured the archives of this forum but nothing quite seems to fit the bill... I would like to plot a graph displaying two variables (y axes) that share date as the x axis. However, the date values for each variable are not the same - for example, some parasitoids were not released on days that collections from the trap took place, whilst sometimes releases did occur on the same

...ks properly: mydata[1,2]=1 g=glm(response~traitment, data=mydata, family=poisson) anova.glm(g,test="Chisq") summary(g) ##################################################################################### END ## Antonin Ferry (PhD) "Laboratoire d'Ecobiologie des Insectes Parasitoides" http://www.parasitoides.univ-rennes1.fr Universit? de Renes1, FRANCE

Hi all, My code: > temp<-outer(release.days,collection.days,'-') > temp<-ifelse(temp>=0,NA,temp) > release.diff<-apply(temp,2,max,na.rm=TRUE) works for one trap and does what I want. That is, it determines the time difference between the collection date of a trap and date of parasitoid release immediately before it, excluding releases that occurred on the same day

I am attempting to emulate the VLOOKUP function from Excel in R. I want to compare one column (coll.minus.release) with another (release.days) to get the number of parasitoid released at that time (TotalParasitoids). for example: coll.minus.release release.days ParasitoidTotal -12 -266 1700 8 -259 1000 8

Dear list members, I have a question concerning multiple comparisons after using glm. My response variable is days until emergence of an insect species. The explanatory variables are sex (two levels), parasitoids added (two levels) and populations (34 levels). I would like to know now which populations are different in days until insect emergence. For this I used multiple comparisons as