notebooks/math_plots.ipynb

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    "### Plotting from an analytic function expression\n",
    "\n",
    "#### Plot in cartesian coordinate system"
   ]
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       "\t\t<text><tspan font-family=\"Arial\" >Math function example</tspan></text>\n",
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      "text/plain": [
       "#<GnuplotRB::Plot:0x000000034f1610 @datasets=Hamster::Vector[#<GnuplotRB::Dataset:0x000000034f13e0 @type=:math_function, @data=\"x*sin(x)\", @options=Hamster::Hash[:with => \"lines\", :lt => {:rgb=>\"blue\", :lw=>3}]>], @options=Hamster::Hash[:xrange => -10..10, :title => \"Math function example\", :ylabel => \"x\", :xlabel => \"x*sin(x)\"], @already_plotted=true, @cmd=\"plot \", @terminal=#<GnuplotRB::Terminal:0x000000034f0eb8 @cmd=\"gnuplot 2>&1\", @current_datablock=0, @err_array=[], @in=#<IO:fd 23>>>"
      ]
     },
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   ],
   "source": [
    "require 'gnuplotrb'\n",
    "include GnuplotRB\n",
    "\n",
    "cartesian = Plot.new(\n",
    "  ['x*sin(x)', with: 'lines', lt: { rgb: 'blue', lw: 3 }],\n",
    "  xrange: -10..10,\n",
    "  title: 'Math function example', \n",
    "  ylabel: 'x',\n",
    "  xlabel: 'x*sin(x)'\n",
    ")"
   ]
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  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "#### Plot in polar coordinate system"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
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       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M158.1,444.0 L158.1,435.0 M158.1,54.1 L158.1,63.1  '/>\t<g transform=\"translate(158.1,466.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 0.6</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M210.2,444.0 L210.2,435.0 M210.2,54.1 L210.2,63.1  '/>\t<g transform=\"translate(210.2,466.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 0.4</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
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       "\t\t<text><tspan font-family=\"Arial\" > 0.4</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
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       "\t\t<text><tspan font-family=\"Arial\" > 0.6</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M522.9,444.0 L522.9,435.0 M522.9,54.1 L522.9,63.1  '/>\t<g transform=\"translate(522.9,466.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
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       "\t\t<text><tspan font-family=\"Arial\" > 1</tspan></text>\n",
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       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
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       "\t\t<text><tspan font-family=\"Arial\" > 0</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M366.6,249.0 L366.6,240.0 M366.6,249.0 L366.6,258.0  '/>\t<g transform=\"translate(366.6,271.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 0.2</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
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       "\t\t<text><tspan font-family=\"Arial\" > 0.4</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M470.8,249.0 L470.8,240.0 M470.8,249.0 L470.8,258.0  '/>\t<g transform=\"translate(470.8,271.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 0.6</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M522.9,249.0 L522.9,240.0 M522.9,249.0 L522.9,258.0  '/>\t<g transform=\"translate(522.9,271.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 0.8</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M575.0,249.0 L575.0,240.0 M575.0,249.0 L575.0,258.0  '/>\t<g transform=\"translate(575.0,271.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 1</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M53.9,54.1 L53.9,444.0 L575.0,444.0 L575.0,54.1 L53.9,54.1 Z  '/></g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<g transform=\"translate(314.4,31.6)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >Plot in polar example</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "\t<g id=\"gnuplot_plot_1\" ><title>abs(sin(3*t))</title>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<g transform=\"translate(507.9,76.6)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text>abs(sin(3*t))</text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<g stroke='none' shape-rendering='crispEdges'>\n",
       "\t\t<polygon fill = 'rgb(255,   0,   0)' points = '516.2,76.6 558.4,76.6 558.4,67.6 516.2,67.6 '/>\n",
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       "\t<g stroke='none' shape-rendering='crispEdges'>\n",
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      ],
      "text/plain": [
       "#<GnuplotRB::Plot:0x000000034c50d8 @datasets=Hamster::Vector[#<GnuplotRB::Dataset:0x000000034b7d48 @type=:math_function, @data=\"abs(sin(3*t))\", @options=Hamster::Hash[:with => \"filledcurves\", :lt => {:rgb=>\"red\"}]>], @options=Hamster::Hash[:samples => 500, :title => \"Plot in polar example\", :polar => true], @already_plotted=true, @cmd=\"plot \", @terminal=#<GnuplotRB::Terminal:0x000000034b7578 @cmd=\"gnuplot 2>&1\", @current_datablock=0, @err_array=[], @in=#<IO:fd 27>>>"
      ]
     },
     "execution_count": 2,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "Plot.new(\n",
    "  ['abs(sin(3*t))', with: 'filledcurves', lt: { rgb: 'red' }],\n",
    "  title: 'Plot in polar example',\n",
    "  polar: true,\n",
    "  samples: 500\n",
    ")"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "#### Plot from a parametric function expression"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
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       "\t\t<text><tspan font-family=\"Arial\" >-3</tspan></text>\n",
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       "\t\t<text><tspan font-family=\"Arial\" > 2</tspan></text>\n",
       "\t</g>\n",
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       "\t<path stroke='black'  d='M575.0,444.0 L575.0,435.0 M575.0,54.1 L575.0,63.1  '/>\t<g transform=\"translate(575.0,466.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 3</tspan></text>\n",
       "\t</g>\n",
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       "\t<path stroke='black'  d='M37.3,54.1 L37.3,444.0 L575.0,444.0 L575.0,54.1 L37.3,54.1 Z  '/></g>\n",
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       "\t\t<text><tspan font-family=\"Arial\" >Parametric plot example</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "\t<g id=\"gnuplot_plot_1\" ><title>Parametric curve</title>\n",
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       "\t\t<text><tspan font-family=\"Arial\" >Parametric curve</tspan></text>\n",
       "\t</g>\n",
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       "\t\tL317.5,289.1 L308.3,306.4 L306.8,325.1 L313.3,343.5 L327.4,359.8 L347.7,372.5 L372.7,380.5 L400.1,383.0\n",
       "\t\tL427.6,379.6 L452.8,370.6 L473.6,356.8 L488.1,339.4 L495.1,319.7 L494.2,299.6 L485.4,280.7 L469.6,264.8\n",
       "\t\tL448.4,253.0 L423.6,246.5 L397.6,245.8 L372.9,250.7 L351.6,261.0 L335.7,275.4 L326.9,292.8 L325.8,311.4\n",
       "\t\tL332.7,329.5 L347.1,345.5 L367.6,357.8 L392.7,365.2 L419.9,367.1 L447.1,363.1 L471.9,353.6 L491.9,339.4\n",
       "\t\tL505.7,321.6 L511.9,301.7 L510.1,281.5 L500.5,262.7 L484.0,246.9 L462.2,235.4 L437.0,229.2 L410.8,228.8\n",
       "\t\tL386.0,234.1 L364.8,244.6 L349.2,259.2 L340.7,276.6 L340.0,295.1 L347.3,313.1 L361.9,328.7 L382.7,340.5\n",
       "\t\tL407.7,347.5 L434.8,348.8 L461.6,344.3 L485.8,334.4 L505.2,319.7 L518.2,301.6 L523.5,281.5 L520.8,261.3\n",
       "\t\tL510.4,242.6 L493.2,227.0 L470.8,215.8 L445.2,210.0 L418.7,209.9 L393.9,215.6 L372.8,226.4 L357.4,241.2\n",
       "\t\tL349.2,258.7 L348.9,277.1 L356.5,294.9 L371.4,310.2 L392.2,321.7 L417.2,328.2 L444.1,329.0 L470.6,324.0\n",
       "\t\tL494.2,313.6 L512.9,298.6 L525.0,280.2 L529.4,260.0 L525.9,239.8 L514.6,221.2 L496.6,205.9 L473.6,195.1\n",
       "\t\tL447.6,189.6 L420.9,190.0 L396.0,196.1 L375.0,207.2 L359.9,222.2 L352.0,239.8 L352.0,258.3 L359.9,275.9\n",
       "\t\tL375.0,290.9 L396.0,302.0 L420.9,308.1 L447.6,308.5 L473.6,303.0 L496.6,292.2 L514.6,276.9 L525.9,258.3\n",
       "\t\tL529.4,238.1 L525.0,217.9 L512.9,199.5 L494.2,184.5 L470.6,174.1 L444.1,169.1 L417.2,169.9 L392.2,176.4\n",
       "\t\tL371.4,187.9 L356.5,203.2 L348.9,221.0 L349.2,239.4 L357.4,256.9 L372.8,271.7 L393.9,282.5 L418.7,288.2\n",
       "\t\tL445.2,288.1 L470.8,282.3 L493.2,271.1 L510.4,255.5 L520.8,236.8 L523.5,216.6 L518.2,196.5 L505.2,178.4\n",
       "\t\tL485.8,163.7 L461.6,153.8 L434.8,149.3 L407.7,150.6 L382.7,157.6 L361.9,169.4 L347.3,185.0 L340.0,203.0\n",
       "\t\tL340.7,221.5 L349.2,238.9 L364.8,253.5 L386.0,264.0 L410.8,269.3 L437.0,268.9 L462.2,262.7 L484.0,251.2\n",
       "\t\tL500.5,235.4 L510.1,216.6 L511.9,196.4 L505.7,176.5 L491.9,158.7 L471.9,144.5 L447.1,135.0 L419.9,131.0\n",
       "\t\tL392.7,132.9 L367.6,140.3 L347.1,152.6 L332.7,168.6 L325.8,186.7 L326.9,205.3 L335.7,222.7 L351.6,237.1\n",
       "\t\tL372.9,247.4 L397.6,252.3 L423.6,251.6 L448.4,245.1 L469.6,233.3 L485.4,217.4 L494.2,198.5 L495.1,178.4\n",
       "\t\tL488.1,158.7 L473.6,141.3 L452.8,127.5 L427.6,118.5 L400.1,115.1 L372.7,117.6 L347.7,125.6 L327.4,138.3\n",
       "\t\tL313.3,154.6 L306.8,173.0 L308.3,191.7 L317.5,209.0 L333.7,223.3 L355.1,233.3 L379.8,238.0 L405.6,237.0\n",
       "\t\tL430.0,230.2 L450.7,218.2 L465.7,202.1 L473.8,183.2 L473.9,163.2 L466.1,143.9 L450.9,126.8 L429.5,113.5\n",
       "\t\tL403.9,105.1 L376.1,102.3 L348.6,105.3 L323.8,113.9 L303.7,127.1 L290.0,143.8 L283.9,162.4 L285.9,181.3\n",
       "\t\tL295.5,198.6 L311.9,212.8 L333.5,222.6 L358.3,227.0 L383.9,225.6 L407.9,218.6 L428.1,206.5 L442.5,190.3\n",
       "\t\tL449.8,171.4 L449.2,151.6 L440.6,132.5 L424.7,115.8 L402.9,103.1 L376.8,95.3 L348.9,93.1 L321.4,96.8\n",
       "\t\tL296.7,105.9 L276.9,119.6 L263.7,136.7 L258.1,155.6 L260.6,174.6 L270.7,191.9 L287.4,206.0 L309.3,215.5\n",
       "\t\tL334.1,219.7 L359.5,218.1 L383.2,210.9 L402.9,198.6 L416.8,182.3 L423.4,163.5 L422.0,143.9 L412.8,125.1\n",
       "\t\tL396.3,108.9 L374.0,96.6 L347.6,89.5 L319.6,88.0 L292.1,92.3 L267.7,102.0 L248.3,116.2 L235.6,133.7\n",
       "\t\tL230.5,152.9 L233.5,172.0 L244.1,189.3 L261.3,203.3 L283.4,212.6 L308.3,216.6 L333.6,214.7 L357.1,207.3\n",
       "\t\tL376.3,194.8 L389.6,178.5 L395.6,159.8 L393.6,140.4 L383.8,121.9 L366.8,106.2 L344.0,94.5 L317.5,87.9\n",
       "\t\tL289.3,87.1 L262.0,92.0 L237.9,102.4 L219.0,117.1 L206.8,135.0 L202.4,154.4 L206.0,173.6 L217.1,190.9\n",
       "\t\tL234.8,204.8 L257.2,214.0 L282.2,217.7 L307.5,215.6 L330.7,207.9 L349.6,195.3 L362.4,179.0 L367.8,160.4\n",
       "\t\tL365.2,141.2 L354.8,123.1 L337.3,107.8 L314.3,96.7 L287.5,90.7 L259.4,90.5 L232.4,96.1 L208.6,107.0\n",
       "\t\tL190.2,122.3 L178.6,140.5 L174.9,160.2 L179.2,179.5 L190.9,196.8 L209.1,210.5 L231.8,219.5 L257.0,223.0\n",
       "\t\tL282.3,220.7 L305.3,212.8 L323.9,200.0 L336.2,183.7 L341.1,165.1 L338.0,146.1 L327.1,128.4 L309.3,113.6\n",
       "\t\tL285.9,103.0 L259.1,97.7 L231.1,98.2 L204.3,104.4 L181.0,115.8 L163.2,131.5 L152.3,150.1 L149.3,170.0\n",
       "\t\tL154.3,189.4 L166.7,206.7 L185.4,220.3 L208.5,229.1 L233.9,232.3 L259.3,229.7 L282.2,221.6 L300.4,208.7\n",
       "\t\tL312.4,192.3 L316.8,173.8 L313.2,155.0 L301.9,137.7 L283.7,123.3 L260.2,113.3 L233.3,108.6 L205.5,109.6\n",
       "\t\tL179.0,116.5 L156.2,128.4 L139.1,144.6 L129.0,163.5 L126.7,183.6 L132.5,203.1 L145.6,220.3 L164.9,233.7\n",
       "\t\tL188.4,242.2 L214.1,245.1 L239.5,242.3 L262.3,233.9 L280.3,220.9 L291.9,204.4 L295.9,186.0 L291.9,167.4\n",
       "\t\tL280.2,150.3 L261.7,136.4 L238.1,126.9 L211.3,122.8 L183.6,124.5 L157.6,131.8 L135.4,144.3 L118.9,160.9\n",
       "\t\tL109.6,180.1 L108.2,200.3 L114.7,219.8 L128.6,236.9 L148.5,250.1 L172.5,258.4 L198.5,261.0 L224.0,257.8\n",
       "\t\tL246.7,249.2 L264.5,235.9 L275.7,219.4 L279.4,201.0 L275.0,182.6 L262.9,165.9 L244.2,152.4 L220.5,143.4\n",
       "\t\tL193.8,139.8 L166.4,142.0 L140.8,149.9 L119.2,162.9 L103.5,179.8 L95.0,199.3 L94.5,219.6 L101.9,239.1\n",
       "\t\tL116.5,256.0 L137.0,269.0 L161.5,276.9 L187.8,279.1 L213.4,275.6 L236.1,266.7 L253.7,253.2 L264.6,236.5\n",
       "\t\tL267.9,218.2 L263.2,199.9 L250.8,183.5 L231.9,170.3 L208.1,161.8 L181.5,158.8 L154.5,161.5 L129.4,169.9\n",
       "\t\tL108.4,183.3 L93.5,200.5 L85.9,220.2 L86.2,240.6 L94.5,259.9 L109.9,276.7 L131.1,289.4 L156.1,296.9\n",
       "\t\tL182.6,298.8 L208.4,294.8 L231.0,285.6 L248.4,271.9 L259.1,255.0 L262.0,236.7 L256.9,218.6 L244.3,202.3\n",
       "\t\tL225.2,189.6 L201.4,181.5 L175.0,178.9 L148.3,182.1 L123.7,190.9 L103.5,204.7 L89.3,222.2 L82.6,242.0\n",
       "\t\tL83.8,262.4 L93.0,281.6 L109.2,298.1 L131.0,310.5 L156.5,317.6 L183.3,319.0 L209.2,314.7 L231.7,305.0\n",
       "\t\tL249.0,291.0 L259.4,274.0 L262.0,255.7 L256.6,237.6 L243.7,221.6 L224.5,209.1 L200.6,201.4 L174.4,199.3\n",
       "\t\tL148.0,202.9 L124.0,212.2 L104.4,226.2 L91.1,244.0 L85.3,263.8 L87.4,284.2 L97.4,303.3 L114.4,319.4\n",
       "\t\tL136.8,331.4 L162.8,338.1 L189.9,339.0 L215.9,334.2 L238.4,324.1 L255.4,309.8 L265.5,292.6 L267.7,274.2\n",
       "\t\tL262.0,256.2 L248.9,240.3 L229.5,228.1 L205.7,220.8 L179.6,219.0 L153.6,223.1 L130.1,232.7 L111.3,247.0\n",
       "\t\tL98.8,264.9 L93.8,284.8 L96.8,305.0 L107.6,323.9 L125.4,339.7 L148.4,351.2 L174.8,357.4 L202.2,357.8\n",
       "\t\tL228.3,352.5 L250.6,342.0 L267.4,327.3 L277.2,309.9 L279.1,291.3 L273.0,273.3 L259.6,257.7 L240.1,245.7\n",
       "\t\tL216.3,238.7 L190.4,237.3 L164.7,241.7 L141.8,251.6 L123.6,266.1 L111.9,284.1 L107.7,304.0 L111.6,324.1\n",
       "\t\tL123.3,342.7 L141.7,358.1 L165.3,369.1 L192.1,374.8 L219.8,374.6 L245.8,368.8 L268.1,357.8 L284.6,342.7\n",
       "\t\tL294.0,325.0 L295.5,306.3 L289.1,288.3 L275.4,272.8 L255.7,261.1 L231.8,254.3 L206.1,253.2 L180.8,257.9\n",
       "\t\tL158.4,268.1 L140.8,282.8 L129.9,300.9 L126.6,320.7 L131.3,340.6 L143.7,358.9 L162.8,373.9 L186.9,384.3\n",
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       "\t\tL149.4,334.3 L154.9,353.9 L168.0,371.8 L187.7,386.3 L212.3,396.2 L239.8,400.7 L267.7,399.3 L293.6,392.3\n",
       "\t\tL315.5,380.3 L331.3,364.4 L339.9,346.1 L340.5,327.1 L333.2,309.1 L318.7,293.7 L298.6,282.3 L274.6,276.1\n",
       "\t\tL249.1,275.5 L224.4,280.8 L202.9,291.4 L186.5,306.3 L177.0,324.5 L175.2,344.1 L181.4,363.5 L195.2,381.0\n",
       "\t\tL215.5,395.0 L240.5,404.3 L268.1,408.1 L296.1,406.1 L321.9,398.5 L343.4,386.0 L358.8,369.6 L366.9,351.0\n",
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       "\t\tL302.1,285.0 L281.6,296.1  '/></g>\n",
       "\t</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"2.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"black\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M37.3,54.1 L37.3,444.0 L575.0,444.0 L575.0,54.1 L37.3,54.1 Z  '/></g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "</g>\n",
       "</g>\n",
       "</svg>\n",
       "\n"
      ],
      "text/plain": [
       "#<GnuplotRB::Plot:0x0000000348bf18 @datasets=Hamster::Vector[#<GnuplotRB::Dataset:0x0000000348bc70 @type=:math_function, @data=\"1.5*cos(t) - cos(30*t), 1.5*sin(t) - sin(30*t)\", @options=Hamster::Hash[:lw => 2, :title => \"Parametric curve\"]>], @options=Hamster::Hash[:samples => 1000, :title => \"Parametric plot example\", :xrange => -3..3, :yrange => -3..3, :parametric => true], @already_plotted=true, @cmd=\"plot \", @terminal=#<GnuplotRB::Terminal:0x0000000348b748 @cmd=\"gnuplot 2>&1\", @current_datablock=0, @err_array=[], @in=#<IO:fd 31>>>"
      ]
     },
     "execution_count": 3,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "Plot.new(\n",
    "  ['1.5*cos(t) - cos(30*t), 1.5*sin(t) - sin(30*t)', title: 'Parametric curve', lw: 2],\n",
    "  title: 'Parametric plot example',\n",
    "  parametric: true,\n",
    "  samples: 1000,\n",
    "  xrange: -3..3,\n",
    "  yrange: -3..3\n",
    ")"
   ]
  }
 ],
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