# Gnuplot
# convergence of E
reset
set macros
#set term png enhanced font arial 10 size 400,600
set term png enhanced size 400,400 fontscale 0.8
set xlabel "N"
set key left bottom Left reverse
set xrange [5 : 2**46]
#set yrange [* : *]
set logscale x
set logscale y

set grid

# reset index of default line styles
colors="black    blue      green     dark-violet red   yellow      brown"
set for [i=1:words(colors)] linetype i lw 2 lc rgb word(colors, i) 

#ref=3.14159265358979323846264

#set title sprintf("Convergence of PI")
set label 1 sprintf("Convergence of PI") at 1e8,5e-4 left
set output sprintf('err_pi.png')

plot "PI_32_err.dat" using 2:($2 <= 2**19 ? abs($4) : 1/0) title "32-bit" with lp,\
     "PI_64_err.dat" using 2:(abs($4)) title "64-bit" with lp,\
     "PI_80_err.dat" using 2:(abs($4)) title "80-bit" with lp