INSTALL REQUIREMENTS
--------------------
1.  Requires the PHP binary to have been built with the GD library, which is
    used by the PHP Sparkline library for generating the sparklines images. A
    version is included with this module as it requires some changes to not
    conflict with Drupal functions.

INSTALL PROCEDURE
-----------------

1.  Enable module from admin interface.
2.  Make sure the temporary image path is valid and working (default will probably be ok).

USAGE
-----
After enabling the module, you'll need to do a couple of other things.

Go into your input formats and enable the sparkline filter, if you want to use the filtered format you outlined above.

Then to use the filter, you create a node (blog, story, etc.) using one of the input formats for which the sparkline filter has been enabled. A sample sparkline embedded into such a posting might be like this:

Fish caught this year by month:
  [sparkline style=bar height=15  0,0,0,4,25,33,12,18,10,0,0,19]

That's how the filter feature is used.

If you want to display dynamic data, such as from a database or feed, you'll need to write some PHP code, probably in your own module. The sparkline module exposes an application programming interface (API) to the sparkline library which you can call to generate sparklines.