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authorYves Fischer <yvesf-git@xapek.org>2013-04-17 00:13:33 +0200
committerYves Fischer <yvesf-git@xapek.org>2013-04-17 00:13:33 +0200
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+About
+-----
+
+Flot is a Javascript plotting library for jQuery. Read more at the
+website:
+
+ http://code.google.com/p/flot/
+
+Take a look at the examples linked from above, they should give a good
+impression of what Flot can do and the source code of the examples is
+probably the fastest way to learn how to use Flot.
+
+
+Installation
+------------
+
+Just include the Javascript file after you've included jQuery.
+
+Generally, all browsers that support the HTML5 canvas tag are
+supported.
+
+For support for Internet Explorer < 9, you can use Excanvas, a canvas
+emulator; this is used in the examples bundled with Flot. You just
+include the excanvas script like this:
+
+ <!--[if lte IE 8]><script language="javascript" type="text/javascript" src="excanvas.min.js"></script><![endif]-->
+
+If it's not working on your development IE 6.0, check that it has
+support for VML which Excanvas is relying on. It appears that some
+stripped down versions used for test environments on virtual machines
+lack the VML support.
+
+You can also try using Flashcanvas (see
+http://code.google.com/p/flashcanvas/), which uses Flash to do the
+emulation. Although Flash can be a bit slower to load than VML, if
+you've got a lot of points, the Flash version can be much faster
+overall. Flot contains some wrapper code for activating Excanvas which
+Flashcanvas is compatible with.
+
+You need at least jQuery 1.2.6, but try at least 1.3.2 for interactive
+charts because of performance improvements in event handling.
+
+
+Basic usage
+-----------
+
+Create a placeholder div to put the graph in:
+
+ <div id="placeholder"></div>
+
+You need to set the width and height of this div, otherwise the plot
+library doesn't know how to scale the graph. You can do it inline like
+this:
+
+ <div id="placeholder" style="width:600px;height:300px"></div>
+
+You can also do it with an external stylesheet. Make sure that the
+placeholder isn't within something with a display:none CSS property -
+in that case, Flot has trouble measuring label dimensions which
+results in garbled looks and might have trouble measuring the
+placeholder dimensions which is fatal (it'll throw an exception).
+
+Then when the div is ready in the DOM, which is usually on document
+ready, run the plot function:
+
+ $.plot($("#placeholder"), data, options);
+
+Here, data is an array of data series and options is an object with
+settings if you want to customize the plot. Take a look at the
+examples for some ideas of what to put in or look at the reference
+in the file "API.txt". Here's a quick example that'll draw a line from
+(0, 0) to (1, 1):
+
+ $.plot($("#placeholder"), [ [[0, 0], [1, 1]] ], { yaxis: { max: 1 } });
+
+The plot function immediately draws the chart and then returns a plot
+object with a couple of methods.
+
+
+What's with the name?
+---------------------
+
+First: it's pronounced with a short o, like "plot". Not like "flawed".
+
+So "Flot" rhymes with "plot".
+
+And if you look up "flot" in a Danish-to-English dictionary, some up
+the words that come up are "good-looking", "attractive", "stylish",
+"smart", "impressive", "extravagant". One of the main goals with Flot
+is pretty looks.