Reads the NONMEM .grd
file for final parameter gradient
Examples
nmgrd(system.file("mods/cpt/runODE032.grd", package="nonmem2rx"))
#> ITERATION GRD(1) GRD(2) GRD(3) GRD(4) GRD(5)
#> 25.0000000 560.0530000 1694.0100000 13.0952000 -115.0000000 -0.5077900
#> GRD(6) GRD(7) GRD(8) GRD(9)
#> -0.2418040 0.0765655 -0.0282282 -0.1172670