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<title>Graphics/Rendering/Chart/Plot/ErrBars.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-2"></a><span class='hs-comment'>-- |</span>
<a name="line-3"></a><span class='hs-comment'>-- Module : Graphics.Rendering.Chart.Plot.ErrBars</span>
<a name="line-4"></a><span class='hs-comment'>-- Copyright : (c) Tim Docker 2006, 2014</span>
<a name="line-5"></a><span class='hs-comment'>-- License : BSD-style (see chart/COPYRIGHT)</span>
<a name="line-6"></a><span class='hs-comment'>--</span>
<a name="line-7"></a><span class='hs-comment'>-- Plot series of points with associated error bars.</span>
<a name="line-8"></a><span class='hs-comment'>--</span>
<a name="line-9"></a><span class='hs-comment'>{-# LANGUAGE TemplateHaskell #-}</span>
<a name="line-10"></a>
<a name="line-11"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Rendering</span><span class='hs-varop'>.</span><span class='hs-conid'>Chart</span><span class='hs-varop'>.</span><span class='hs-conid'>Plot</span><span class='hs-varop'>.</span><span class='hs-conid'>ErrBars</span><span class='hs-layout'>(</span>
<a name="line-12"></a> <span class='hs-conid'>PlotErrBars</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-13"></a> <span class='hs-conid'>ErrPoint</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-14"></a> <span class='hs-conid'>ErrValue</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-15"></a> <span class='hs-varid'>symErrPoint</span><span class='hs-layout'>,</span>
<a name="line-16"></a>
<a name="line-17"></a> <span class='hs-comment'>-- * Accessors</span>
<a name="line-18"></a> <span class='hs-comment'>-- | These accessors are generated by template haskell</span>
<a name="line-19"></a>
<a name="line-20"></a> <span class='hs-varid'>plot_errbars_title</span><span class='hs-layout'>,</span>
<a name="line-21"></a> <span class='hs-varid'>plot_errbars_line_style</span><span class='hs-layout'>,</span>
<a name="line-22"></a> <span class='hs-varid'>plot_errbars_tick_length</span><span class='hs-layout'>,</span>
<a name="line-23"></a> <span class='hs-varid'>plot_errbars_overhang</span><span class='hs-layout'>,</span>
<a name="line-24"></a> <span class='hs-varid'>plot_errbars_values</span><span class='hs-layout'>,</span>
<a name="line-25"></a><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-26"></a>
<a name="line-27"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Lens</span>
<a name="line-28"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Monoid</span>
<a name="line-29"></a>
<a name="line-30"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Rendering</span><span class='hs-varop'>.</span><span class='hs-conid'>Chart</span><span class='hs-varop'>.</span><span class='hs-conid'>Geometry</span>
<a name="line-31"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Rendering</span><span class='hs-varop'>.</span><span class='hs-conid'>Chart</span><span class='hs-varop'>.</span><span class='hs-conid'>Drawing</span>
<a name="line-32"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Rendering</span><span class='hs-varop'>.</span><span class='hs-conid'>Chart</span><span class='hs-varop'>.</span><span class='hs-conid'>Plot</span><span class='hs-varop'>.</span><span class='hs-conid'>Types</span>
<a name="line-33"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Colour</span> <span class='hs-layout'>(</span><span class='hs-varid'>opaque</span><span class='hs-layout'>)</span>
<a name="line-34"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Colour</span><span class='hs-varop'>.</span><span class='hs-conid'>Names</span> <span class='hs-layout'>(</span><span class='hs-varid'>blue</span><span class='hs-layout'>)</span>
<a name="line-35"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Default</span><span class='hs-varop'>.</span><span class='hs-conid'>Class</span>
<a name="line-36"></a>
<a name="line-37"></a><span class='hs-comment'>-- | Value for holding a point with associated error bounds for each axis.</span>
<a name="line-38"></a>
<a name="line-39"></a><a name="ErrValue"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>ErrValue</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ErrValue</span> <span class='hs-layout'>{</span>
<a name="line-40"></a> <span class='hs-varid'>ev_low</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>x</span><span class='hs-layout'>,</span>
<a name="line-41"></a> <span class='hs-varid'>ev_best</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>x</span><span class='hs-layout'>,</span>
<a name="line-42"></a> <span class='hs-varid'>ev_high</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>x</span>
<a name="line-43"></a><span class='hs-layout'>}</span> <span class='hs-keyword'>deriving</span> <span class='hs-conid'>Show</span>
<a name="line-44"></a>
<a name="line-45"></a><a name="ErrPoint"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>ErrPoint</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ErrPoint</span> <span class='hs-layout'>{</span>
<a name="line-46"></a> <span class='hs-varid'>ep_x</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ErrValue</span> <span class='hs-varid'>x</span><span class='hs-layout'>,</span>
<a name="line-47"></a> <span class='hs-varid'>ep_y</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ErrValue</span> <span class='hs-varid'>y</span>
<a name="line-48"></a><span class='hs-layout'>}</span> <span class='hs-keyword'>deriving</span> <span class='hs-conid'>Show</span>
<a name="line-49"></a>
<a name="line-50"></a><a name="symErrPoint"></a><span class='hs-comment'>-- | When the error is symmetric, we can simply pass in dx for the error.</span>
<a name="line-51"></a><span class='hs-definition'>symErrPoint</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Num</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Num</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ErrPoint</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span>
<a name="line-52"></a><span class='hs-definition'>symErrPoint</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-varid'>dx</span> <span class='hs-varid'>dy</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ErrPoint</span> <span class='hs-layout'>(</span><span class='hs-conid'>ErrValue</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-comment'>-</span><span class='hs-varid'>dx</span><span class='hs-layout'>)</span> <span class='hs-varid'>x</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-varop'>+</span><span class='hs-varid'>dx</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-53"></a> <span class='hs-layout'>(</span><span class='hs-conid'>ErrValue</span> <span class='hs-layout'>(</span><span class='hs-varid'>y</span><span class='hs-comment'>-</span><span class='hs-varid'>dy</span><span class='hs-layout'>)</span> <span class='hs-varid'>y</span> <span class='hs-layout'>(</span><span class='hs-varid'>y</span><span class='hs-varop'>+</span><span class='hs-varid'>dy</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-54"></a>
<a name="line-55"></a><a name="PlotErrBars"></a><span class='hs-comment'>-- | Value defining a series of error intervals, and a style in</span>
<a name="line-56"></a><a name="PlotErrBars"></a><span class='hs-comment'>-- which to render them.</span>
<a name="line-57"></a><a name="PlotErrBars"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>PlotErrBars</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>PlotErrBars</span> <span class='hs-layout'>{</span>
<a name="line-58"></a> <span class='hs-sel'>_plot_errbars_title</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span><span class='hs-layout'>,</span>
<a name="line-59"></a> <span class='hs-sel'>_plot_errbars_line_style</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>LineStyle</span><span class='hs-layout'>,</span>
<a name="line-60"></a> <span class='hs-sel'>_plot_errbars_tick_length</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Double</span><span class='hs-layout'>,</span>
<a name="line-61"></a> <span class='hs-sel'>_plot_errbars_overhang</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Double</span><span class='hs-layout'>,</span>
<a name="line-62"></a> <span class='hs-sel'>_plot_errbars_values</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>ErrPoint</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span><span class='hs-keyglyph'>]</span>
<a name="line-63"></a><span class='hs-layout'>}</span>
<a name="line-64"></a>
<a name="line-65"></a>
<a name="line-66"></a><a name="instance%20ToPlot%20PlotErrBars"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>ToPlot</span> <span class='hs-conid'>PlotErrBars</span> <span class='hs-keyword'>where</span>
<a name="line-67"></a> <span class='hs-varid'>toPlot</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Plot</span> <span class='hs-layout'>{</span>
<a name="line-68"></a> <span class='hs-sel'>_plot_render</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>renderPlotErrBars</span> <span class='hs-varid'>p</span><span class='hs-layout'>,</span>
<a name="line-69"></a> <span class='hs-sel'>_plot_legend</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-sel'>_plot_errbars_title</span> <span class='hs-varid'>p</span><span class='hs-layout'>,</span> <span class='hs-varid'>renderPlotLegendErrBars</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>,</span>
<a name="line-70"></a> <span class='hs-sel'>_plot_all_points</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span> <span class='hs-varid'>concat</span> <span class='hs-keyglyph'>[</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>ev_low</span> <span class='hs-varid'>x</span><span class='hs-layout'>,</span><span class='hs-varid'>ev_high</span> <span class='hs-varid'>x</span><span class='hs-keyglyph'>]</span>
<a name="line-71"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>ErrPoint</span> <span class='hs-varid'>x</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>pts</span> <span class='hs-keyglyph'>]</span>
<a name="line-72"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>concat</span> <span class='hs-keyglyph'>[</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>ev_low</span> <span class='hs-varid'>y</span><span class='hs-layout'>,</span><span class='hs-varid'>ev_high</span> <span class='hs-varid'>y</span><span class='hs-keyglyph'>]</span>
<a name="line-73"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>ErrPoint</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>pts</span> <span class='hs-keyglyph'>]</span> <span class='hs-layout'>)</span>
<a name="line-74"></a> <span class='hs-layout'>}</span>
<a name="line-75"></a> <span class='hs-keyword'>where</span>
<a name="line-76"></a> <span class='hs-varid'>pts</span> <span class='hs-keyglyph'>=</span> <span class='hs-sel'>_plot_errbars_values</span> <span class='hs-varid'>p</span>
<a name="line-77"></a>
<a name="line-78"></a><a name="renderPlotErrBars"></a><span class='hs-definition'>renderPlotErrBars</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>PlotErrBars</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PointMapFn</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ChartBackend</span> <span class='hs-conid'>()</span>
<a name="line-79"></a><span class='hs-definition'>renderPlotErrBars</span> <span class='hs-varid'>p</span> <span class='hs-varid'>pmap</span> <span class='hs-keyglyph'>=</span>
<a name="line-80"></a> <span class='hs-varid'>mapM_</span> <span class='hs-layout'>(</span><span class='hs-varid'>drawErrBar</span><span class='hs-varop'>.</span><span class='hs-varid'>epmap</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-sel'>_plot_errbars_values</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span>
<a name="line-81"></a> <span class='hs-keyword'>where</span>
<a name="line-82"></a> <span class='hs-varid'>epmap</span> <span class='hs-layout'>(</span><span class='hs-conid'>ErrPoint</span> <span class='hs-layout'>(</span><span class='hs-conid'>ErrValue</span> <span class='hs-varid'>xl</span> <span class='hs-varid'>x</span> <span class='hs-varid'>xh</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>ErrValue</span> <span class='hs-varid'>yl</span> <span class='hs-varid'>y</span> <span class='hs-varid'>yh</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-83"></a> <span class='hs-conid'>ErrPoint</span> <span class='hs-layout'>(</span><span class='hs-conid'>ErrValue</span> <span class='hs-varid'>xl'</span> <span class='hs-varid'>x'</span> <span class='hs-varid'>xh'</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>ErrValue</span> <span class='hs-varid'>yl'</span> <span class='hs-varid'>y'</span> <span class='hs-varid'>yh'</span><span class='hs-layout'>)</span>
<a name="line-84"></a> <span class='hs-keyword'>where</span> <span class='hs-layout'>(</span><span class='hs-conid'>Point</span> <span class='hs-varid'>x'</span> <span class='hs-varid'>y'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>pmap'</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-layout'>,</span><span class='hs-varid'>y</span><span class='hs-layout'>)</span>
<a name="line-85"></a> <span class='hs-layout'>(</span><span class='hs-conid'>Point</span> <span class='hs-varid'>xl'</span> <span class='hs-varid'>yl'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>pmap'</span> <span class='hs-layout'>(</span><span class='hs-varid'>xl</span><span class='hs-layout'>,</span><span class='hs-varid'>yl</span><span class='hs-layout'>)</span>
<a name="line-86"></a> <span class='hs-layout'>(</span><span class='hs-conid'>Point</span> <span class='hs-varid'>xh'</span> <span class='hs-varid'>yh'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>pmap'</span> <span class='hs-layout'>(</span><span class='hs-varid'>xh</span><span class='hs-layout'>,</span><span class='hs-varid'>yh</span><span class='hs-layout'>)</span>
<a name="line-87"></a> <span class='hs-varid'>drawErrBar</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>drawErrBar0</span> <span class='hs-varid'>p</span>
<a name="line-88"></a> <span class='hs-varid'>pmap'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mapXY</span> <span class='hs-varid'>pmap</span>
<a name="line-89"></a>
<a name="line-90"></a><a name="drawErrBar0"></a><span class='hs-definition'>drawErrBar0</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>PlotErrBars</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ErrPoint</span> <span class='hs-conid'>Double</span> <span class='hs-conid'>Double</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ChartBackend</span> <span class='hs-conid'>()</span>
<a name="line-91"></a><span class='hs-definition'>drawErrBar0</span> <span class='hs-varid'>ps</span> <span class='hs-layout'>(</span><span class='hs-conid'>ErrPoint</span> <span class='hs-layout'>(</span><span class='hs-conid'>ErrValue</span> <span class='hs-varid'>xl</span> <span class='hs-varid'>x</span> <span class='hs-varid'>xh</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>ErrValue</span> <span class='hs-varid'>yl</span> <span class='hs-varid'>y</span> <span class='hs-varid'>yh</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-92"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>tl</span> <span class='hs-keyglyph'>=</span> <span class='hs-sel'>_plot_errbars_tick_length</span> <span class='hs-varid'>ps</span>
<a name="line-93"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>oh</span> <span class='hs-keyglyph'>=</span> <span class='hs-sel'>_plot_errbars_overhang</span> <span class='hs-varid'>ps</span>
<a name="line-94"></a> <span class='hs-varid'>withLineStyle</span> <span class='hs-layout'>(</span><span class='hs-sel'>_plot_errbars_line_style</span> <span class='hs-varid'>ps</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span>
<a name="line-95"></a> <span class='hs-varid'>strokePath</span> <span class='hs-varop'>$</span> <span class='hs-varid'>moveTo'</span> <span class='hs-layout'>(</span><span class='hs-varid'>xl</span><span class='hs-comment'>-</span><span class='hs-varid'>oh</span><span class='hs-layout'>)</span> <span class='hs-varid'>y</span>
<a name="line-96"></a> <span class='hs-varop'><></span> <span class='hs-varid'>lineTo'</span> <span class='hs-layout'>(</span><span class='hs-varid'>xh</span><span class='hs-varop'>+</span><span class='hs-varid'>oh</span><span class='hs-layout'>)</span> <span class='hs-varid'>y</span>
<a name="line-97"></a> <span class='hs-varop'><></span> <span class='hs-varid'>moveTo'</span> <span class='hs-varid'>x</span> <span class='hs-layout'>(</span><span class='hs-varid'>yl</span><span class='hs-comment'>-</span><span class='hs-varid'>oh</span><span class='hs-layout'>)</span>
<a name="line-98"></a> <span class='hs-varop'><></span> <span class='hs-varid'>lineTo'</span> <span class='hs-varid'>x</span> <span class='hs-layout'>(</span><span class='hs-varid'>yh</span><span class='hs-varop'>+</span><span class='hs-varid'>oh</span><span class='hs-layout'>)</span>
<a name="line-99"></a> <span class='hs-varop'><></span> <span class='hs-varid'>moveTo'</span> <span class='hs-varid'>xl</span> <span class='hs-layout'>(</span><span class='hs-varid'>y</span><span class='hs-comment'>-</span><span class='hs-varid'>tl</span><span class='hs-layout'>)</span>
<a name="line-100"></a> <span class='hs-varop'><></span> <span class='hs-varid'>lineTo'</span> <span class='hs-varid'>xl</span> <span class='hs-layout'>(</span><span class='hs-varid'>y</span><span class='hs-varop'>+</span><span class='hs-varid'>tl</span><span class='hs-layout'>)</span>
<a name="line-101"></a> <span class='hs-varop'><></span> <span class='hs-varid'>moveTo'</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-comment'>-</span><span class='hs-varid'>tl</span><span class='hs-layout'>)</span> <span class='hs-varid'>yl</span>
<a name="line-102"></a> <span class='hs-varop'><></span> <span class='hs-varid'>lineTo'</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-varop'>+</span><span class='hs-varid'>tl</span><span class='hs-layout'>)</span> <span class='hs-varid'>yl</span>
<a name="line-103"></a> <span class='hs-varop'><></span> <span class='hs-varid'>moveTo'</span> <span class='hs-varid'>xh</span> <span class='hs-layout'>(</span><span class='hs-varid'>y</span><span class='hs-comment'>-</span><span class='hs-varid'>tl</span><span class='hs-layout'>)</span>
<a name="line-104"></a> <span class='hs-varop'><></span> <span class='hs-varid'>lineTo'</span> <span class='hs-varid'>xh</span> <span class='hs-layout'>(</span><span class='hs-varid'>y</span><span class='hs-varop'>+</span><span class='hs-varid'>tl</span><span class='hs-layout'>)</span>
<a name="line-105"></a> <span class='hs-varop'><></span> <span class='hs-varid'>moveTo'</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-comment'>-</span><span class='hs-varid'>tl</span><span class='hs-layout'>)</span> <span class='hs-varid'>yh</span>
<a name="line-106"></a> <span class='hs-varop'><></span> <span class='hs-varid'>lineTo'</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-varop'>+</span><span class='hs-varid'>tl</span><span class='hs-layout'>)</span> <span class='hs-varid'>yh</span>
<a name="line-107"></a>
<a name="line-108"></a><a name="renderPlotLegendErrBars"></a><span class='hs-definition'>renderPlotLegendErrBars</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>PlotErrBars</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Rect</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ChartBackend</span> <span class='hs-conid'>()</span>
<a name="line-109"></a><span class='hs-definition'>renderPlotLegendErrBars</span> <span class='hs-varid'>p</span> <span class='hs-layout'>(</span><span class='hs-conid'>Rect</span> <span class='hs-varid'>p1</span> <span class='hs-varid'>p2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-110"></a> <span class='hs-varid'>drawErrBar</span> <span class='hs-layout'>(</span><span class='hs-varid'>symErrPoint</span> <span class='hs-layout'>(</span><span class='hs-varid'>p_x</span> <span class='hs-varid'>p1</span><span class='hs-layout'>)</span> <span class='hs-varid'>y</span> <span class='hs-varid'>dx</span> <span class='hs-varid'>dx</span><span class='hs-layout'>)</span>
<a name="line-111"></a> <span class='hs-varid'>drawErrBar</span> <span class='hs-layout'>(</span><span class='hs-varid'>symErrPoint</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>p_x</span> <span class='hs-varid'>p1</span> <span class='hs-varop'>+</span> <span class='hs-varid'>p_x</span> <span class='hs-varid'>p2</span><span class='hs-layout'>)</span><span class='hs-varop'>/</span><span class='hs-num'>2</span><span class='hs-layout'>)</span> <span class='hs-varid'>y</span> <span class='hs-varid'>dx</span> <span class='hs-varid'>dx</span><span class='hs-layout'>)</span>
<a name="line-112"></a> <span class='hs-varid'>drawErrBar</span> <span class='hs-layout'>(</span><span class='hs-varid'>symErrPoint</span> <span class='hs-layout'>(</span><span class='hs-varid'>p_x</span> <span class='hs-varid'>p2</span><span class='hs-layout'>)</span> <span class='hs-varid'>y</span> <span class='hs-varid'>dx</span> <span class='hs-varid'>dx</span><span class='hs-layout'>)</span>
<a name="line-113"></a>
<a name="line-114"></a> <span class='hs-keyword'>where</span>
<a name="line-115"></a> <span class='hs-varid'>drawErrBar</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>drawErrBar0</span> <span class='hs-varid'>p</span>
<a name="line-116"></a> <span class='hs-varid'>dx</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>min</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>p_x</span> <span class='hs-varid'>p2</span> <span class='hs-comment'>-</span> <span class='hs-varid'>p_x</span> <span class='hs-varid'>p1</span><span class='hs-layout'>)</span><span class='hs-varop'>/</span><span class='hs-num'>6</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>p_y</span> <span class='hs-varid'>p2</span> <span class='hs-comment'>-</span> <span class='hs-varid'>p_y</span> <span class='hs-varid'>p1</span><span class='hs-layout'>)</span><span class='hs-varop'>/</span><span class='hs-num'>2</span><span class='hs-layout'>)</span>
<a name="line-117"></a> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>p_y</span> <span class='hs-varid'>p1</span> <span class='hs-varop'>+</span> <span class='hs-varid'>p_y</span> <span class='hs-varid'>p2</span><span class='hs-layout'>)</span><span class='hs-varop'>/</span><span class='hs-num'>2</span>
<a name="line-118"></a>
<a name="line-119"></a><a name="instance%20Default%20(PlotErrBars%20x%20y)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Default</span> <span class='hs-layout'>(</span><span class='hs-conid'>PlotErrBars</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-120"></a> <span class='hs-varid'>def</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>PlotErrBars</span>
<a name="line-121"></a> <span class='hs-layout'>{</span> <span class='hs-sel'>_plot_errbars_title</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>""</span>
<a name="line-122"></a> <span class='hs-layout'>,</span> <span class='hs-sel'>_plot_errbars_line_style</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>solidLine</span> <span class='hs-num'>1</span> <span class='hs-varop'>$</span> <span class='hs-varid'>opaque</span> <span class='hs-varid'>blue</span>
<a name="line-123"></a> <span class='hs-layout'>,</span> <span class='hs-sel'>_plot_errbars_tick_length</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>3</span>
<a name="line-124"></a> <span class='hs-layout'>,</span> <span class='hs-sel'>_plot_errbars_overhang</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>0</span>
<a name="line-125"></a> <span class='hs-layout'>,</span> <span class='hs-sel'>_plot_errbars_values</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span>
<a name="line-126"></a> <span class='hs-layout'>}</span>
<a name="line-127"></a>
<a name="line-128"></a><span class='hs-varop'>$</span><span class='hs-layout'>(</span> <span class='hs-varid'>makeLenses</span> <span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>PlotErrBars</span> <span class='hs-layout'>)</span>
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