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Rrrrrr…… now we know what it is but how the heck do you use it?

Rrrrrr…… now we know what it is but how the heck do you use it?. Andrew Trant PPS Arctic - Labrador Highlands Research Group. Become a modele’R’. Using Reel Fish Example: General Linear model > testaov<-aov(N~transect+year,data=fish)) #for an interaction term: transect*year Now try:

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Rrrrrr…… now we know what it is but how the heck do you use it?

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  1. Rrrrrr……now we know what it is but how the heck do you use it? Andrew Trant PPS Arctic - Labrador Highlands Research Group

  2. Become a modele’R’ Using Reel Fish Example: General Linear model >testaov<-aov(N~transect+year,data=fish)) #for an interaction term: transect*year Now try: >summary(testaov) >plot(testaov) >names(testaov)

  3. Continuous ve’R’sus Catagorical Numeric versus Factor Look at the degrees of freedom - something strange… >is.numeric(fish$transect) >is.factor(fish$transect) >as.factor(fish$transect) >fish$transect2<-as.factor(fish$transect) Rerun with: > testaov2<-aov(N~transect2+year,data=fish)

  4. Generalized Linear Model GAUSSIAN >testglm<-glm(N~transect+year,family=gaussian,data=fish) Again, check: >plot(testglm) >summary(testglm)

  5. Generalized Linear Model GAMMA >testglm2<-glm(N~transect+year,family=Gamma,data=fish) Again, check: >plot(testglm2) >summary(testglm2)

  6. A few last t’R’icks Getting more than one plot per graphics window: >par(mfrow=c(2,2))

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