#!/bin/bash

PI=" 3.141592654 "
OUT="foo.tex"

gnuplot << __EOF__

set term latex
set output "$OUT"
set title "COS01"

plot					\
	[0:1] [0:1]			\
	(0.5 - 0.5 * cos(x*$PI))	\
	with line

__EOF__

wc $OUT