# generic commands for twographbox output size
load "twograph3D.in"

set tmargin 0
set bmargin 3

set data style lines

set xlabel "{/Times-Italic x}_{/*0.8 1}" 0,-0.3
set ylabel "{/Times-Italic x}_{/*0.8 2}" 0,0
set zlabel ""
set xrange [-3:7]
set yrange [10:-5]
set ztics 0.2
set nokey
set samples 200,200
set isosamples 40,40
#set hidden3d

g(i) = 1/(1+exp(-i))
s(x,y) = 1.5*(a*x +  b*y + c)
a = 1.7
b = -1
c=-4.9

set output "logistic-cliff.eps"
splot g(s(x,y)) lw 2