xlim problems in ageKeyPlot

[droglenc]

Here is my question/problem with a reproducible example (end of e-mail). How do I set limits on the x and y-axis using alkPlot? In my example, I was purposefully trying to over restrict the x-axis to look at a specific area of the entire plot (sort of a quick subset) just so I could further my understanding of how I can use this plotting function. I used pages 70 and 101 of your book as an example for coding xlim. The documentation for alkPlot says xlim = “A numeric of length 2 that provide the limits for the x-axis or y-axis.” There were no examples in the help description for alkPlot that demonstrated manipulations of either the x-axis or the y-axis.

#Reproducible example

library(FSA) #version 0.8.5
Age3<-data.frame(Age =3,FL=round(rnorm(1000,580,45)))
Age4<-data.frame(Age =4,FL=round(rnorm(1000,750,45)))
Age5<-data.frame(Age =5,FL=round(rnorm(1000,865,45)))
df<-rbind(Age3,Age4,Age5)
df<-lencat(~FL,data=df,startcat=300,w=20,vname="Bin20")#20 mm bins

test<-xtabs(~Bin20+Age,data=df)
ALK.obs<-prop.table(test,margin=1)
ALK.obs
alkPlot(ALK.obs,showLegend=TRUE,xlim=c(500,800))