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<div><h2 id="a0000000047">1.2.3 Shaded Regions</h2>
<p>The following plot styles allow regions of graphs to be shaded with colour: </p><ul class="itemize">
<li><p><tt class="tt">yerrorshaded</tt><a name="a0000000667" id="a0000000667"></a><a name="a0000000668" id="a0000000668"></a> </p></li><li><p><tt class="tt">shadedregion</tt><a name="a0000000669" id="a0000000669"></a><a name="a0000000670" id="a0000000670"></a> </p></li>
</ul><p>Both of these plot styles fill specified regions of graphs with the selected <tt class="tt">fillcolour</tt> and draw a line around the boundary of the region with the selected <tt class="tt">colour</tt>, <tt class="tt">linetype</tt> and <tt class="tt">linewidth</tt>. They differ in the format in which they expect the input data to be arranged. The <tt class="tt">yerrorshaded</tt><a name="a0000000671" id="a0000000671"></a><a name="a0000000672" id="a0000000672"></a> plot style is similar to the <tt class="tt">yerrorrange</tt><a name="a0000000673" id="a0000000673"></a><a name="a0000000674" id="a0000000674"></a> plot style, and expects three columns of data, specifying respectively the <img src="images/img-0019.png" alt="$x$" style="vertical-align:0px;
width:10px;
height:8px" class="math gen" />-coordinate and the minimum and maximum extremes of the vertical errorbar on each datapoint. The region contained between the upper and lower limits of these error bars is filled with colour. Note that the datapoints must be sorted in order of either increasing or decreasing <img src="images/img-0019.png" alt="$x$" style="vertical-align:0px;
width:10px;
height:8px" class="math gen" />-coordinate for sensible behaviour. </p><p>The <tt class="tt">shadedregion</tt><a name="a0000000675" id="a0000000675"></a><a name="a0000000676" id="a0000000676"></a> plot style takes only two columns of input data, specifying the <img src="images/img-0019.png" alt="$x$" style="vertical-align:0px;
width:10px;
height:8px" class="math gen" />- and <img src="images/img-0020.png" alt="$y$" style="vertical-align:-4px;
width:9px;
height:12px" class="math gen" />-coordinates of a series of datapoints which are to be joined in a join-the-dots fashion. At the end of each dataset, the drawn path is closed and filled. </p><p>The use of these plot styles on three-dimensional graphs may produce unexpected results. </p></div>
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