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gnuplot学习实例，基于科学网连载的gnuplot教程
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‎gnuplot_datafile/3-More_2D.plt‎

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reset
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set samples 1000
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set xlabel;
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set ylabel;
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set title
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set xrange [-pi:pi]
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plot sin(x)*cos(x)+sin(x)*sin(x)-0.5*cos(2*x*x) notitle
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set grid
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set polar
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set trange[-pi:pi]
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plot sin(t)*cos(t)+sin(t)*sin(t)-0.5*cos(2*t*t) notitle
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set grid polar
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set xtics axis;
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set ytics axis
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set xrange [-2:2];
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set yrange [-2:2]
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set size square
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set title "Grandma's mittens"

‎gnuplot_datafile/3d_s.plt‎

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reset
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set xlabel "X"
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set ylabel "Y"
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set zlabel "Z"
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set xyplane 0.2
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set hidden3d
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set view 45,30
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unset key
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set border 4095 lc rgb "#2554C7"
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splot "data3d.dat" with lines

‎gnuplot_datafile/Piecewise_s.plt‎

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reset
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unset border
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set zeroaxis lt -1
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set xtics axis -1,2,1
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set ytics axis 1 offset 0,0.5
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set arrow 1 from 0,0 to 1.5,0 filled
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set arrow 2 from 0,0 to 0,1.5 filled
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plus(x) = x>0? 1 : 1/0
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minus(x) = x<0? -1 : 1/0
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set label 1 at 0,0 point pt 7 ps 1.5 lc rgb "red" front
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plot plus(x) lw 2 lc rgb "red" title "sgn(x)", minus(x) lw 2 lc rgb "red" notitle

‎gnuplot_datafile/aa.txt‎

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‎gnuplot_datafile/arrow_s.plt‎

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reset
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set term wxt font "DejaVu Sans,12"
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sinc(x) = sin(pi*x)/(pi*x)
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set xlabel "X"
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set xrange [-5:5]
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set xtics 1
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set ylabel "Y"
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set yrange [-0.4:1.2]
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set ytics 0.2
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set y2label "Y2"
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#set y2range [-2:5]
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#set y2tics 1
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set title "sinc(x) 函数"
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unset key
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set samples 500
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set grid
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set arrow 1 from 2,1.05 to 0.3,1 filled size 0.5,15,60 lw 2
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set label 1 at 0,1 point pt 7 ps 1.5 lc rgb "#F87217"
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set label 2 "最大值在（0, 1）" at 2.1,1.05
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plot sinc(x) lw 2

‎gnuplot_datafile/axis.png‎

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