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  • maxima画图

    • 八卦
    
    load(draw)$
    draw2d(
        dimensions=[800,800], /*大小*/
        ip_grid   = [1000,1000], /*光滑一点*/
        line_width= 1., 
        terminal  = 'aquaterm,
        font      = "Kaiti", /*不同系统设置不同字体*/
        font_size = 20,
        title     = "八卦图",
        color     = blue,
        xrange = [-3.3,3.3], yrange=[-3.3,3.3],
        proportional_axes=xy,
        transform = [ρ.cos(θ), ρ.sin(θ), θ, ρ],
        implicit(sin(ρ) / ρ = %e ^ (-θ), θ,0,4*%pi, ρ,-4,4)
    )$
    
    

    a1: matrix([0.85,0.04],[-0.04,0.85])$
    a2: matrix([0.2,-0.26],[0.23,0.22])$
    a3: matrix([-0.15,0.28],[0.26,0.24])$
    a4: matrix([0,0],[0,0.16])$
    p1: [0,1.6]$
    p2: [0,1.6]$
    p3: [0,0.44]$
    p4: [0,0]$
    w: [85,92,99,100]$
    ifs(w, [a1,a2,a3,a4], [p1,p2,p3,p4], [5,0], 50000, [style,dots], 
        [box, true], [axes, false], [color, green], 
        [title, "2019-08-02"])$
    

    • 爱心
    load(draw)$
    
    f: sqrt(cos(x)) * cos(200*x) + sqrt(abs(x))$
    draw2d(
        terminal = 'aquaterm,
        color = red,
        proportional_axes=xy,
        ip_grid = [500,500],
        implicit(
            (f-7/10)*(4-x*x)**(1/100)=y,
            x,-1.6,1.6,
            y,-1.6,1.6
        )
    )$
    

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  • 原文地址:https://www.cnblogs.com/bregman/p/11282020.html
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