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Luke Campagnola d4e8e2b883 Imported major changes from acq4 project.
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<h1>ScatterPlotItem<a class="headerlink" href="#scatterplotitem" title="Permalink to this headline"></a></h1>
<dl class="class">
<dt id="pyqtgraph.ScatterPlotItem">
<em class="property">class </em><tt class="descclassname">pyqtgraph.</tt><tt class="descname">ScatterPlotItem</tt><big>(</big><em>spots=None</em>, <em>x=None</em>, <em>y=None</em>, <em>pxMode=True</em>, <em>pen='default'</em>, <em>brush='default'</em>, <em>size=7</em>, <em>symbol=None</em>, <em>identical=False</em>, <em>data=None</em><big>)</big><a class="headerlink" href="#pyqtgraph.ScatterPlotItem" title="Permalink to this definition"></a></dt>
<dd><dl class="method">
<dt id="pyqtgraph.ScatterPlotItem.__init__">
<tt class="descname">__init__</tt><big>(</big><em>spots=None</em>, <em>x=None</em>, <em>y=None</em>, <em>pxMode=True</em>, <em>pen='default'</em>, <em>brush='default'</em>, <em>size=7</em>, <em>symbol=None</em>, <em>identical=False</em>, <em>data=None</em><big>)</big><a class="headerlink" href="#pyqtgraph.ScatterPlotItem.__init__" title="Permalink to this definition"></a></dt>
<dd><dl class="docutils">
<dt>Arguments:</dt>
<dd><dl class="first docutils">
<dt>spots: list of dicts. Each dict specifies parameters for a single spot:</dt>
<dd>{&#8216;pos&#8217;: (x,y), &#8216;size&#8217;, &#8216;pen&#8217;, &#8216;brush&#8217;, &#8216;symbol&#8217;}</dd>
</dl>
<p>x,y: array of x,y values. Alternatively, specify spots[&#8216;pos&#8217;] = (x,y)
pxMode: If True, spots are always the same size regardless of scaling, and size is given in px.</p>
<blockquote>
Otherwise, size is in scene coordinates and the spots scale with the view.</blockquote>
<dl class="last docutils">
<dt>identical: If True, all spots are forced to look identical. </dt>
<dd>This can result in performance enhancement.</dd>
<dt>symbol can be one of:</dt>
<dd>&#8216;o&#8217; circle
&#8216;s&#8217; square
&#8216;t&#8217; triangle
&#8216;d&#8217; diamond
&#8216;+&#8217; plus</dd>
</dl>
</dd>
</dl>
</dd></dl>
<dl class="method">
<dt id="pyqtgraph.ScatterPlotItem.setPoints">
<tt class="descname">setPoints</tt><big>(</big><em>spots=None</em>, <em>x=None</em>, <em>y=None</em>, <em>data=None</em><big>)</big><a class="headerlink" href="#pyqtgraph.ScatterPlotItem.setPoints" title="Permalink to this definition"></a></dt>
<dd><p>Remove all existing points in the scatter plot and add a new set.
Arguments:</p>
<blockquote>
<dl class="docutils">
<dt>spots - list of dicts specifying parameters for each spot</dt>
<dd>[ {&#8216;pos&#8217;: (x,y), &#8216;pen&#8217;: &#8216;r&#8217;, ...}, ...]</dd>
<dt>x, y - arrays specifying location of spots to add. </dt>
<dd>all other parameters (pen, symbol, etc.) will be set to the default
values for this scatter plot.
these arguments are IGNORED if &#8216;spots&#8217; is specified</dd>
<dt>data - list of arbitrary objects to be assigned to spot.data for each spot</dt>
<dd>(this is useful for identifying spots that are clicked on)</dd>
</dl>
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