set title "FFT3D on 1.4Ghz UltraSPARC T2"

set key off

set xlabel "threads (on 8 PEs)"
set xrange [0:34]
set xtics  (1,4,8,12,16,20,24,28,32)

set ylabel "speedup"
set yrange [0:16]
set ytics  (0,4,8,12,16)

set terminal pdf monochrome dashed font "Times-Roman" fsize 12 size 5,3.5

set style line 1 lt 2 lw 1
set style line 2 lt 1 lw 4

plot x with lines ls 1, "greyarea-cut.ssv" using ($1):(98.7778/$2):(98.7778/$3):(98.7778/$4) ls 2  with yerrorlines