# Rev Language Reference

## dfLinear

### Usage

dfLinear(RealPos N0, RealPos N1, RealPos t0, RealPos t1)

### Arguments

 N0 : RealPos (pass by reference) The population size at the beginning of the growth period (towards the present). N1 : RealPos (pass by reference) The population size at the end of the growth period (towards the past). t0 : RealPos (pass by reference) The time of the beginning of the growth period (towards the present). t1 : RealPos (pass by reference) The time of the end of the growth period (towards the past).