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set term wxt enhanced font "Times New Roman,16"

gauss(x) = exp(-pi*x*x)

#set title "func=e^{-πx^2}"

set title "func=e^{-πx^2}" offset 12,-5

set samples 500

set xrange [-3:3]

set yrange [-0.2:1.2]

unset key

unset border

set zeroaxis lt -1 lw 2

#set xtics axis -2,0.5,2

#set ytics axis 0,0.5,1

#output to PNG file

set term pngcairo lw 2 font "AR_PL_UKai_CN,14"

set output "axis.png"

set xtics axis -2,0.5,2 offset 0.4,0

set ytics axis 0,0.5,1 offset 0,0.4

set arrow 1 from 2,0 to 3.2,0 filled size 0.2,15,60 lw 2

set arrow 2 from 0,1 to 0,1.22 filled size 0.2,15,60 lw 2

set rmargin 5

set label 1 "X" at 3.0,-0.1

set label 2 "Y" at -0.3,1.2

plot gauss(x) lw 3

set output

set term wxt