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set term svg size 800,600 enhanced font 'Times,12'
set output 'Natural_Logarithm_Re.svg'

set multiplot

set cntrparam levels auto 20
set contour base
set isosamples 60,60
set samples 60,60
set xlabel "x"
set ylabel "y"
set zlabel "z"
set xrange [-2.5:2.5]
set yrange [-2.0:2.0]
set zrange [-3:4]
set box
#set view 65,45
# Draw the surface
set pm3d
set hidd
unset key
set ticslevel 0
set palette defined (-1 "blue", 1 "pink")
i = {0.0,1.0}
splot real(log(x+i*y))
# Draw the lines
unset cntrparam
unset contour
unset pm3d
unset hidd
set isosamples 20,20
set samples 20,20
splot real(log(x+i*y)) lt rgb "black"

unset multiplot
set term x11
set output