bpowers/gist:5648164

## gistfile1.txt
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
 "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<!-- Generated by graphviz version 2.30.1 (20130423.2036)
 -->
<!-- Title: ./z_prof; 5028 samples Pages: 1 -->
<svg width="100%" height="100%"
  xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<script type="text/ecmascript"><![CDATA[
// SVGPan
// http://www.cyberz.org/blog/2009/12/08/svgpan-a-javascript-svg-panzoomdrag-library/
// Local modification: if(true || ...) below to force panning, never moving.
// Local modification: add clamping to fix bug in handleMouseWheel.

/**
 *  SVGPan library 1.2
 * ====================
 *
 * Given an unique existing element with id "viewport", including the
 * the library into any SVG adds the following capabilities:
 *
 *  - Mouse panning
 *  - Mouse zooming (using the wheel)
 *  - Object dargging
 *
 * Known issues:
 *
 *  - Zooming (while panning) on Safari has still some issues
 *
 * Releases:
 *
 * 1.2, Sat Mar 20 08:42:50 GMT 2010, Zeng Xiaohui
 *	Fixed a bug with browser mouse handler interaction
 *
 * 1.1, Wed Feb  3 17:39:33 GMT 2010, Zeng Xiaohui
 *	Updated the zoom code to support the mouse wheel on Safari/Chrome
 *
 * 1.0, Andrea Leofreddi
 *	First release
 *
 * This code is licensed under the following BSD license:
 *
 * Copyright 2009-2010 Andrea Leofreddi <a.leofreddi@itcharm.com>. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are
 * permitted provided that the following conditions are met:
 *
 *    1. Redistributions of source code must retain the above copyright notice, this list of
 *       conditions and the following disclaimer.
 *
 *    2. Redistributions in binary form must reproduce the above copyright notice, this list
 *       of conditions and the following disclaimer in the documentation and/or other materials
 *       provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY Andrea Leofreddi ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL Andrea Leofreddi OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * The views and conclusions contained in the software and documentation are those of the
 * authors and should not be interpreted as representing official policies, either expressed
 * or implied, of Andrea Leofreddi.
 */

var root = document.documentElement;

var state = 'none', stateTarget, stateOrigin, stateTf;

setupHandlers(root);

/**
 * Register handlers
 */
function setupHandlers(root){
	setAttributes(root, {
		"onmouseup" : "add(evt)",
		"onmousedown" : "handleMouseDown(evt)",
		"onmousemove" : "handleMouseMove(evt)",
		"onmouseup" : "handleMouseUp(evt)",
		//"onmouseout" : "handleMouseUp(evt)", // Decomment this to stop the pan functionality when dragging out of the SVG element
	});

	if(navigator.userAgent.toLowerCase().indexOf('webkit') >= 0)
		window.addEventListener('mousewheel', handleMouseWheel, false); // Chrome/Safari
	else
		window.addEventListener('DOMMouseScroll', handleMouseWheel, false); // Others

	var g = svgDoc.getElementById("svg");
	g.width = "100%";
	g.height = "100%";
}

/**
 * Instance an SVGPoint object with given event coordinates.
 */
function getEventPoint(evt) {
	var p = root.createSVGPoint();

	p.x = evt.clientX;
	p.y = evt.clientY;

	return p;
}

/**
 * Sets the current transform matrix of an element.
 */
function setCTM(element, matrix) {
	var s = "matrix(" + matrix.a + "," + matrix.b + "," + matrix.c + "," + matrix.d + "," + matrix.e + "," + matrix.f + ")";

	element.setAttribute("transform", s);
}

/**
 * Dumps a matrix to a string (useful for debug).
 */
function dumpMatrix(matrix) {
	var s = "[ " + matrix.a + ", " + matrix.c + ", " + matrix.e + "\n  " + matrix.b + ", " + matrix.d + ", " + matrix.f + "\n  0, 0, 1 ]";

	return s;
}

/**
 * Sets attributes of an element.
 */
function setAttributes(element, attributes){
	for (i in attributes)
		element.setAttributeNS(null, i, attributes[i]);
}

/**
 * Handle mouse move event.
 */
function handleMouseWheel(evt) {
	if(evt.preventDefault)
		evt.preventDefault();

	evt.returnValue = false;

	var svgDoc = evt.target.ownerDocument;

	var delta;

	if(evt.wheelDelta)
		delta = evt.wheelDelta / 3600; // Chrome/Safari
	else
		delta = evt.detail / -90; // Mozilla

	var z = 1 + delta; // Zoom factor: 0.9/1.1

	// Clamp to reasonable values.
	// The 0.1 check is important because
	// a very large scroll can turn into a
	// negative z, which rotates the image 180 degrees.
	if(z < 0.1)
		z = 0.1;
	if(z > 10.0)
		z = 10.0;

	var g = svgDoc.getElementById("viewport");

	var p = getEventPoint(evt);

	p = p.matrixTransform(g.getCTM().inverse());

	// Compute new scale matrix in current mouse position
	var k = root.createSVGMatrix().translate(p.x, p.y).scale(z).translate(-p.x, -p.y);

        setCTM(g, g.getCTM().multiply(k));

	stateTf = stateTf.multiply(k.inverse());
}

/**
 * Handle mouse move event.
 */
function handleMouseMove(evt) {
	if(evt.preventDefault)
		evt.preventDefault();

	evt.returnValue = false;

	var svgDoc = evt.target.ownerDocument;

	var g = svgDoc.getElementById("viewport");

	if(state == 'pan') {
		// Pan mode
		var p = getEventPoint(evt).matrixTransform(stateTf);

		setCTM(g, stateTf.inverse().translate(p.x - stateOrigin.x, p.y - stateOrigin.y));
	} else if(state == 'move') {
		// Move mode
		var p = getEventPoint(evt).matrixTransform(g.getCTM().inverse());

		setCTM(stateTarget, root.createSVGMatrix().translate(p.x - stateOrigin.x, p.y - stateOrigin.y).multiply(g.getCTM().inverse()).multiply(stateTarget.getCTM()));

		stateOrigin = p;
	}
}

/**
 * Handle click event.
 */
function handleMouseDown(evt) {
	if(evt.preventDefault)
		evt.preventDefault();

	evt.returnValue = false;

	var svgDoc = evt.target.ownerDocument;

	var g = svgDoc.getElementById("viewport");

	if(true || evt.target.tagName == "svg") {
		// Pan mode
		state = 'pan';

		stateTf = g.getCTM().inverse();

		stateOrigin = getEventPoint(evt).matrixTransform(stateTf);
	} else {
		// Move mode
		state = 'move';

		stateTarget = evt.target;

		stateTf = g.getCTM().inverse();

		stateOrigin = getEventPoint(evt).matrixTransform(stateTf);
	}
}

/**
 * Handle mouse button release event.
 */
function handleMouseUp(evt) {
	if(evt.preventDefault)
		evt.preventDefault();

	evt.returnValue = false;

	var svgDoc = evt.target.ownerDocument;

	if(state == 'pan' || state == 'move') {
		// Quit pan mode
		state = '';
	}
}

]]></script>
<g id="viewport" transform="translate(0,0)">
<g id="viewport" class="graph" transform="scale(1 1) rotate(0) translate(4 1246)">
<title>./z_prof; 5028 samples</title>
<polygon fill="white" stroke="white" points="-4,5 -4,-1246 893,-1246 893,5 -4,5"/>
<!-- Legend -->
<g id="node1" class="node"><title>Legend</title>
<text text-anchor="start" x="8" y="-1218.8" font-family="Times,serif" font-size="24.00">./z_prof</text>
<text text-anchor="start" x="8" y="-1192.8" font-family="Times,serif" font-size="24.00">Total samples: 5028</text>
<text text-anchor="start" x="8" y="-1166.8" font-family="Times,serif" font-size="24.00">Focusing on: 5028</text>
<text text-anchor="start" x="8" y="-1140.8" font-family="Times,serif" font-size="24.00">Dropped nodes with &lt;= 25 abs(samples)</text>
<text text-anchor="start" x="8" y="-1114.8" font-family="Times,serif" font-size="24.00">Dropped edges with &lt;= 5 samples</text>
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<text text-anchor="end" x="483.5" y="-1162.1" font-family="Times,serif" font-size="8.00">of 5022 (99.9%)</text>
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<text text-anchor="end" x="483.5" y="-1032.1" font-family="Times,serif" font-size="8.00">0 (0.0%)</text>
<text text-anchor="end" x="483.5" y="-1023.1" font-family="Times,serif" font-size="8.00">of 5022 (99.9%)</text>
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<g id="edge8" class="edge"><title>N1&#45;&gt;N3</title>
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<text text-anchor="end" x="483.5" y="-935.1" font-family="Times,serif" font-size="8.00">of 5022 (99.9%)</text>
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<text text-anchor="end" x="520.5" y="-847.1" font-family="Times,serif" font-size="8.00">of 5021 (99.9%)</text>
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<g id="edge15" class="edge"><title>N2&#45;&gt;N4</title>
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<text text-anchor="end" x="521" y="-759.1" font-family="Times,serif" font-size="8.00">of 5021 (99.9%)</text>
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<g id="edge5" class="edge"><title>N4&#45;&gt;N5</title>
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<text text-anchor="end" x="483.5" y="-671.1" font-family="Times,serif" font-size="8.00">of 5021 (99.9%)</text>
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<g id="edge11" class="edge"><title>N5&#45;&gt;N6</title>
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<text text-anchor="end" x="487" y="-492.64" font-family="Times,serif" font-size="9.20">of 4380 (87.1%)</text>
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<!-- N7&#45;&gt;N11 -->
<g id="edge1" class="edge"><title>N7&#45;&gt;N11</title>
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<text text-anchor="end" x="566" y="-209.3" font-family="Times,serif" font-size="11.50">24 (0.5%)</text>
<text text-anchor="end" x="566" y="-196.3" font-family="Times,serif" font-size="11.50">of 5016 (99.8%)</text>
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<!-- N8&#45;&gt;N9 -->
<g id="edge7" class="edge"><title>N8&#45;&gt;N9</title>
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<g id="edge9" class="edge"><title>N11&#45;&gt;N8</title>
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<g id="edge12" class="edge"><title>N11&#45;&gt;N13</title>
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<g id="edge14" class="edge"><title>N12&#45;&gt;N8</title>
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	// SVGPan
	// http://www.cyberz.org/blog/2009/12/08/svgpan-a-javascript-svg-panzoomdrag-library/
	// Local modification: if(true \|\| ...) below to force panning, never moving.
	// Local modification: add clamping to fix bug in handleMouseWheel.

	/**
	* SVGPan library 1.2
	* ====================
	*
	* Given an unique existing element with id "viewport", including the
	* the library into any SVG adds the following capabilities:
	*
	* - Mouse panning
	* - Mouse zooming (using the wheel)
	* - Object dargging
	*
	* Known issues:
	*
	* - Zooming (while panning) on Safari has still some issues
	*
	* Releases:
	*
	* 1.2, Sat Mar 20 08:42:50 GMT 2010, Zeng Xiaohui
	* Fixed a bug with browser mouse handler interaction
	*
	* 1.1, Wed Feb 3 17:39:33 GMT 2010, Zeng Xiaohui
	* Updated the zoom code to support the mouse wheel on Safari/Chrome
	*
	* 1.0, Andrea Leofreddi
	* First release
	*
	* This code is licensed under the following BSD license:
	*
	* Copyright 2009-2010 Andrea Leofreddi <a.leofreddi@itcharm.com>. All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without modification, are
	* permitted provided that the following conditions are met:
	*
	* 1. Redistributions of source code must retain the above copyright notice, this list of
	* conditions and the following disclaimer.
	*
	* 2. Redistributions in binary form must reproduce the above copyright notice, this list
	* of conditions and the following disclaimer in the documentation and/or other materials
	* provided with the distribution.
	*
	* THIS SOFTWARE IS PROVIDED BY Andrea Leofreddi ``AS IS'' AND ANY EXPRESS OR IMPLIED
	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
	* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL Andrea Leofreddi OR
	* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
	* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
	* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
	* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
	* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*
	* The views and conclusions contained in the software and documentation are those of the
	* authors and should not be interpreted as representing official policies, either expressed
	* or implied, of Andrea Leofreddi.
	*/

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	"onmouseup" : "handleMouseUp(evt)",
	//"onmouseout" : "handleMouseUp(evt)", // Decomment this to stop the pan functionality when dragging out of the SVG element
	});

	if(navigator.userAgent.toLowerCase().indexOf('webkit') >= 0)
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	var g = svgDoc.getElementById("svg");
	g.width = "100%";
	g.height = "100%";
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	* Instance an SVGPoint object with given event coordinates.
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	function getEventPoint(evt) {
	var p = root.createSVGPoint();

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	/**
	* Dumps a matrix to a string (useful for debug).
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	evt.returnValue = false;

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	var delta;

	if(evt.wheelDelta)
	delta = evt.wheelDelta / 3600; // Chrome/Safari
	else
	delta = evt.detail / -90; // Mozilla

	var z = 1 + delta; // Zoom factor: 0.9/1.1

	// Clamp to reasonable values.
	// The 0.1 check is important because
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	var g = svgDoc.getElementById("viewport");

	var p = getEventPoint(evt);

	p = p.matrixTransform(g.getCTM().inverse());

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