gnuplot基本绘图-绘制坐标轴、刻度、图例、文本、箭头、线段等

set size square

set xrange[-1:1]
set yrange[0:1]

set key at -0.4, 0.96

set xlabel 'x'
set ylabel 'y'

set xtics 0.5 
set ytics 0.5

set mxtics 4
set mytics 4

set label "x^2" at 0.5,0.5

set arrow from -0.5,0.0 to 0.4,0.6 lt 2 lw 2
set arrow from 0.0,0.0 to 0.5,0.6 nohead lt 3 lw 2

plot x**2 w p pt 1 ps 2, x**0.5 w l lt 1 lw 2

reset 

效果如图：