another useless tweak

plot.sh

@@ -7,10 +7,10 @@ DATAFILE="serial/foo.dat"
 IMAGE="graphe.png"
 TMPFILE="/tmp/tmpdata"
 
-tail -1200 < ${DATAFILE} > ${TMPFILE}
+tail -20000 < ${DATAFILE} > ${TMPFILE}
 
 gnuplot << __EOC__
-set term png 	size 1400,700
+set term png 	size 2400,700
 set output 	"${IMAGE}"
 set ytics	2
 set xtics