# set terminal pngcairo transparent enhanced font "arial,10" fontscale 1.0 size 600, 400 # set output 'BesselK.2.png' set view 42, 33, 1, 1 set samples 201, 201 set isosamples 201, 201 set hidden3d back offset 1 trianglepattern 3 undefined 1 altdiagonal bentover set style data lines set xyplane relative 0 set title "Modified Bessel functions of the second kind" set xlabel "x" set xrange [ -5.00000 : 5.00000 ] noreverse set ylabel "iy" set yrange [ -5.00000 : 5.00000 ] noreverse set zrange [ -10.0000 : 5.00000 ] noreverse unset colorbox NO_ANIMATION = 1 save_encoding = "utf8" splot real(BesselK(0, x+y*I)) with lines lw .2