Why aren't bearings aligning in proper azimuths in plot?

Question

I am using plotrix package in R. The polar.plot function allows me to plot frequency of targets per bearing. I have this example:

library(plotrix)
ex <- c(100,100,100,100,100,120,120,140,150,170,200,200,200,200)
tex <- table(ex) 
polar.plot(as.numeric(tex), start = 90, clockwise = TRUE, 
   line.col = "blue", lwd = 2)  

Can you try this? I'm having trouble figuring out why they do not align properly.

Answer 1

You need to use the polar.pos argument:

 polar.plot(as.numeric(tex), 
     polar.pos=as.numeric(names(tex)), start = 90, clockwise = TRUE, 
     line.col = "blue", lwd = 2)