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amt
2005 Mar 04
0
Multilevel modeling of animal behavior
...;perpendicularity":
oriscale1<-ifelse(abs(orid-azimuth)> 1.570796&abs(orid-azimuth) <= 3.141593, 3.141593 -abs(orid-azimuth),abs(orid-azimuth))
oriscale2<- ifelse(abs(orid-azimuth)> 3.141593&abs(orid-azimuth) <= 4.712389, abs(orid-azimuth)- 3.141593,oriscale1)
orid.azmt<- ifelse(abs(orid-azimuth)> 4.712389, 6.283185-abs(orid-azimuth), oriscale2)
# recalculating orih and He from the orid.azmt keeps all orientations in the same quartile,
# and eliminates negative orih values:
orih.azmt<- rep(tapply(orid.azmt,obs,circ.mean),tapply(orid,obs,length))
Herd.a...