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🌡️ 📆 令和6年6月15日

README

About

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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

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Just include the Javascript file after you've included jQuery.

Note that you need to get a version of Excanvas (I currently suggest

you take the one bundled with Flot as it contains a bugfix for drawing

filled shapes) which is canvas emulation on Internet Explorer. You can

include the excanvas script like this:

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.

Also note that you need at least jQuery 1.2.1.

Basic usage

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Create a placeholder div to put the graph in:

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:

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?

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First: it's pronounced with a short o, like "plot". Not like "flawed".

So "Flot" is like "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. Flot is supposed to be "flot".

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