Displaying 1 result from an estimated 1 matches for "pop2000".
2008 Oct 29
2
Help using tapply with multiple variables
...r<-log(N1/N0)/dt
r
}
which calculates the annual growth rates in a population
Where N0 is the population classified into age intervals, say 5
years, at time=1995, and N1 is the population by 5 year age classes
at time=2000.
For example some data like this are:
country pop1995 pop2000
1 1712 1940
1 1329 1535
1 1101 1268
1 911 1048
1 758 859
2 627 710
2 513 584
2 420 475
2 754 965
2 638 741
I want to use the tapply function to apply the pres.test function
over all countries in my data table (the re...