G'day,
There was an article linked from Slashdot today
http://queue.acm.org/detail.cfm?id=1809426
which featured an interesting form of graph which the now-Oracle
Fishworks guys call a heat map. Basically, it's a plot with 3 axes: x,
y, and a z which is represented as the grey level of a pixel. Their
examples seem mostly to be x=time, y=latency or disk offset, and
z=number of samples, so that the (y,z) slice is basically a histogram
rotated up from the screen, and the chart as a whole represents how that
histogram changes over time.
There's nothing new or magic about this. Audio engineers have been
using precisely this chart format for years, except that they call it a
spectrogram.
--
Greg.
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