f(x) = 5*besj1(x)*exp(-x/5)
set samples 20
set xrange [0:10]
set yrange [-1:2.5]
unset key
set term pngcairo enh font "Times, 10" size 480,360
set out "plot_labels.png"
set label "plot with labels" at sc 0.4, 0.85 font "Helvetica,18"
set xlabel "£Ø¼´ IPA¥´¥·¥Ã¥¯" font "IPAGothic,12"
set ylabel "£Ù¼´ IPAÌÀÄ«" font "IPAMincho,12"
plot '+' u 1:(f($1)):("{/Symbol=16 \247}") w labels tc rgb "dark-green"