# set terminal pngcairo  transparent enhanced font "arial,10" fontscale 1.0 size 600, 400 
# set output 'BesselK.5.png'
set border -1 front lt black linewidth 1.000 dashtype solid
set grid nopolar
set grid xtics nomxtics ytics nomytics ztics nomztics nortics nomrtics \
 nox2tics nomx2tics noy2tics nomy2tics nocbtics nomcbtics
set grid vertical layerdefault   lt 0 linecolor 0 linewidth 0.500,  lt 0 linecolor 0 linewidth 0.500
set view 41, 19, 1, 1
set samples 50, 50
set isosamples 50, 50
set hidden3d back offset 1 trianglepattern 3 undefined 1 altdiagonal bentover
set xyplane relative 0
set ztics  norangelimit 10 
set xrange [ -2.00000 : 2.00000 ] noreverse
set yrange [ -2.00000 : 2.00000 ] noreverse
set zrange [ -25.0000 : 15.0000 ] noreverse
set pm3d interpolate 1,1 flush begin noftriangles border lt black linewidth 1.000 dashtype solid corners2color mean
set pm3d lighting primary 0.4 specular 0.3 spec2 0.1
set pm3d spotlight rgb 0xff0044 rot_x 50 rot_z 90 Phong 4.0
unset colorbox
NO_ANIMATION = 1
save_encoding = "utf8"
nu = 4
## Last datafile plotted: "++"
splot imag( BesselK( nu=4, x+y*I) ) with pm3d fc ls 3