Take a look at the the examples in examples/index.html; 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.
Generally, all modern browsers are supported.
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.
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:
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 API reference. Here's a quick example that'll draw a line from (0, 0) to (1, 1):
The plot function immediately draws the chart and then returns a plot object with a couple of methods.
Documentation and examples
API Documentation is available here: API reference
About how the plugins work: Plugins
High level overview on how interactions are handled internally: Interactions
Examples are included in the examples folder of this repository, but they can be tried out online as well: Examples