plot
	data stars.dat
# DWARFS (red)
	lines 1 10 
	read { i 3 j 4 a 5 b 6 c 7 }
	set nad = i+j
	set mgd = a+b+c
# SUBGIANTS (green)
	lines 12 13
	read { i 3 j 4 a 5 b 6 c 7 }
	set nasub = i+j
	set mgsub = a+b+c
# GIANTS (blue)
	lines 15 25 
	read { i 3 j 4 a 5 b 6 c 7 }
	set nag = i+j
	set mgg = a+b+c
# BRIGHT GIANTS (turquoise)
	lines 27 29
	read { i 3 j 4 a 5 b 6 c 7 }
	set nab = i+j
	set mgb = a+b+c
# SUPERGIANTS (black)
	lines 31 39 
	read { i 3 j 4 a 5 b 6 c 7 }
	set nas = i+j
	set mgs = a+b+c
#
	read { f 3 g 4 l 5 m 6 n 7 }
	set naall=f+g
	set mgall=l+m+n
	lsq naall mgall naall qall
#
	window 2 3 1 3
	erase
	limits 0 7 0 10.5
	box 1 5 4 4 
	ctype 3
	expand 0.9
	ptype 3 0
	points nad mgd
	lsq naall mgall naall qall
	ctype 2
	connect naall qall
	lsq nad mgd nad qd
#	connect nad qd
	set ad = $a
	set bd = $b
#
	ctype 4
	ptype 3 3
	points nasub mgsub
	lsq nasub mgsub nasub qsub
#	connect nasub qsub
	set asub = $a
	set bsub = $b
#
	ctype 5
	ptype 4 0
	points nag mgg
	lsq nag mgg nag qg
#	connect nag qg
	set ag = $a
	set bg = $b
#
	ctype 6
	ptype 5 2
	points nab mgb
	lsq nab mgb nab qb
#	connect nab qb
	set ab = $a
	set bb = $b
#
	ctype 2
	ptype 6 3
	points nas mgs
	lsq nas mgs nas qs
#	connect nas qs
	set as = $a
	set bs = $b
#
	ctype 2	
	expand 0.9
	ylabel EW(Na) (\AA)
	relocate 0.5 9.5
	label All Stars
#
	window 2 3 2 3
	limits nad mgd 
	ctype 2
	box 1 5 4 4
	ptype 6 3
	points nad mgd
	ctype 3 
	connect nad qd
	ctype 2
	ylabel EW(Na) (\AA)
	relocate 1.2 9.5
	label Dwarfs
#
	window 2 3 1 2
	limits nasub mgsub 
	ctype 2 
	box 1 5 4 4 
	ptype 6 3
	points nasub mgsub
	ctype 4 
	connect nasub qsub
	ctype 2
	ylabel EW(Na) (\AA)
	relocate 0.95 2.22
	label Sub-giants
#
	window 2 3 2 2
	limits nag mgg 
	ctype 2 
	box 1 5 4 4
	ptype 6 3
	points nag mgg
	ctype 5 
	connect nag qg
	ctype 2
	ylabel EW(Na) (\AA)
	relocate 1.2 7
	label Normal Giants
#
	window 2 3 1 1 
	limits nab mgb
	ctype 2 
	box 1 5 4 4
	ptype 6 3
	points nab mgb
	ctype 6 
	connect nab qb
	ctype 2
	relocate 2.8 7
	label Bright Giants
	ylabel EW(Na) (\AA)
	xlabel EW(Mg) (\AA)
#
	window 2 3 2 1 
	limits nas mgs
	ctype 2 
	box 1 5 4 4
	ptype 6 3
	points nas mgs
	ctype 2
	connect nas qs
	relocate 0.9 6.2
	label Supergiants
	ylabel EW(Na) (\AA)
	xlabel EW(Mg) (\AA)
	ctype 2
#
	ctype 2