( http://www.cqham.ru/forum/showthread...=1#post2068127 )

:
$DATA << EOD
# F L C
1e3 3.3e-6 72.6e-12
10e3 3e-6 62e-12
100e3 2.84e-6 62e-12
200e3 2.7e-6 66.5e-12
EOD
set colorsequence classic
set grid
set title "-274"
set lmargin 9
set rmargin 9
set log x
set xrange [800:250e3]
set term png size 640,640
set out "_-274__.png"
set multiplot layout 2,1
set ylabel ", "
plot \
"$DATA" u 1:(sqrt($2/$3)) w lp title "ro"
set grid y2
set yrange [2:4]
set ytics
set ylabel ", uH"
set y2range [60:75]
set y2tics
set y2label ", pF"
unset title
set xlabel ""
plot \
"$DATA" u 1:($2*1e6) w lp title "L", \
"$DATA" u 1:($3*1e12) w lp axes x1y2 title "C"