# set terminal png transparent nocrop enhanced font arial 8 size 420,320 
# set output 'fit.14.png'
set key bmargin center horizontal Right noreverse enhanced autotitles nobox
set title "fitted to realistic model function" 
set xlabel "Temperature T  [deg Cels.]" 
set ylabel "Density [g/cm3]" 
l(x) = y0 + m*x
high(x) = mh*(x-Tc) + dens_Tc
lowlin(x)  = ml*(x-Tc) + dens_Tc
curve(x) = b*tanh(g*(Tc-x))
density(x) = x < Tc ? curve(x)+lowlin(x) : high(x)
y0 = 1.0686507417645
m = -0.000943519626916798
FIT_CONVERGED = 1
FIT_NDF = 31
FIT_STDFIT = 5.38882119840539e-05
FIT_WSSR = 9.00221211159881e-08
ml = -0.00100003942457188
mh = -0.000831266464087347
dens_Tc = 1.02497044549157
Tc = 46.0899236389933
g = 3.85585054783351
b = 0.00153901241267826
FIT_LIMIT = 1e-10
plot 'lcdemo.dat', density(x)
## fit density(x) 'lcdemo.dat' via 'start.par'