[Chicago-talk] Graphing (plotting) time-series data?

Greg Fast gdf at speakeasy.net
Wed Apr 13 17:35:56 PDT 2005

On Wed, 13 Apr 2005 17:48:16 -0500, "Wiggins d'Anconia" <wiggins at danconia.org> wrote:
> Greg Fast wrote:
> > On Wed, 13 Apr 2005 17:00:55 -0500, "Wiggins d'Anconia" <wiggins at danconia.org> wrote:
> > 
> >>GD::Graph can graph just about any data set just about anyway, 
> >>especially when combined with ImageMagick, but again you would have to 
> >>handle the time series data structure yourself and supply it correctly 
> >>to the module. If you haven't checked it out you might want to.
> > 
> > 
> > It's not just handling the data bit, but the labelling bit.  The data
> > isn't going to be gappy, and generating dated axis labels by hand is
> > something I'd rather not do.
> > 
> Can you give us an idea of the data?  I am not sure why you would need 
> to generate axis labels by hand, especially if the data *isn't* gappy...

Oh, whoops, that should have been "*is* going to be gappy" (that'll
teach me to fire mail off as I run off to catch the train...)

The data (this week) is basically a set of {start: timestamp, elapsed:
milliseconds, success: boolean} tuples.  I've got a couple of hundred
points spanning a couple of months, with various gaps (where I had
complete connection failures, bugs, etc).  Ideally, I'd like to flag
the points where success=false with a red dot or somesuch (otherwise,
I'll drop them from the data set or plot them with a second line).

Greg Fast

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