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2008 Mar 26
1
cbind and mean by week
...14,0.013,0.013,0.013,0.013,NA,0.010,0.013,0.015,0.011,0.014,0.014,0.014,0.014,0.016)
pd<-c(0,0,NA,80,NA,45,223,228,224,488,525,NA,80,417,413,373,914,213,651,521,979)
x<-data.frame(week,td,pd)
x
pmean<- tapply(x[,3], x$week, mean)
pdmean
pdmean<- data.frame(pmean)
pdmean
xweek <- aggregate(x, list(x$week), mean)
xweek
Felipe D. Carrillo
Fishery Biologist
Department of the Interior
US Fish & Wildlife Service
California, USA
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