R : Copyright 2006, The R Foundation for Statistical Computing
Version 2.3.0 (2006-04-24)
ISBN 3-900051-07-0

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> library(drfit)
Loading required package: MASS
Loading required package: RODBC
> data(antifoul)
> rantifoul <- drfit(antifoul)

TBT: Fitting data...
Waiting for profiling to be done...

Zn Pyrithion: Fitting data...
Waiting for profiling to be done...
> rantifoul
     Substance ndl   n       lld     lhd  mtype    logED50       2.5%
1          TBT  38 135 -2.709271 2.39794 probit -0.1643560 -0.2650411
2 Zn Pyrithion  27  81 -2.107210 2.00000 probit -0.3979222 -0.5078291
        97.5% unit     sigma          a         b
1 -0.05648615   µM 0.1928611 -0.1643560 0.6763882
2 -0.29156056   µM 0.2286560 -0.3979222 0.4169632
>