# ci_commands.txt
#
# Usage:
#  gnuplot < ci_commands.txt
#
set term png
set nokey
set output 'ci_plot.png'
set xlabel '<---X--->'
set ylabel '<---Ci(X)--->'
set yrange [ -1.0 : +1.0 ]
set title 'Cosine integral Ci(x)'
set grid
set style data lines
plot 'ci_data.txt' using 1:2 lw 3 linecolor rgb 'blue'