There appear to be two ways to get data into a custom graph. (1) Use the built-in NCV module to parse it out of a Hobbit message, or (2) use the --extra-script and --extra-test options to hobbitd_rrd. I have tried (1) but not (2) yet.
I want to use (1) for it's efficient operation, but the Hobbit message format it requires for parsing looks ugly when displayed on the webpage (at least I think it's ugly). So I was looking for ways to "hide" the data from the webpage while still allowing the NCV module to find it. My first thought was to send the Hobbit message with the graphing data hidden inside a <div style="display:invisible">...</div> block. But this doesn't work because when generating the webpage, Hobbit puts the incoming message inside a <table>, and you can't hide <div>'s when they're inside a table cell.
Does anyone have other solutions to this, while still using method (1) so the NCV module can efficientlhy parse things? Or am I stuck with learning and moving to method (2)?