set logscale y
set title "Relative Error for Model Partition Function"
set xlabel "# of terms"
set ylabel "relative error"

set xrange [0:40]
set yrange [1e-11:1]

plot \
 "Z_int_rel.dat" using 1:2 title "lambda = 0.01" ,\
 "Z_int_rel.dat" using 1:3 title "lambda = 0.02" ,\
 "Z_int_rel.dat" using 1:4 title "lambda = 0.05" ,\
 "Z_int_rel.dat" using 1:5 title "lambda = 0.10" ,\
 "Z_int_rel.dat" using 1:6 title "lambda = 0.20"
 
set out "Z_int_rel1.ps"
set term postscript
replot

set xrange [0:15]
set yrange [1e-2:10]

set out "Z_int_rel2.ps"
set term postscript
replot