114381 - Add trend curve to startup/pageload diagrams

Status: VERIFIED FIXED

(Webtools Graveyard :: Tinderbox, enhancement)

Description

[Sebastian Späth]

I really love the new startup/pageload diagrams through tinderbox. But however
here comes one more tiny improvement suggestion(as we users are never really
satisfied :-):

Adding a trend curve (just a simple linear trend or maybe a gliding mean curve)
would be terrific to compensate the occuring error deviation and to see the
trends more clearly.

Does this make sense to you as well?

Comment 1

[Chris McAfee]

gnuplot does bezier curves, maybe we can try that.

Comment 2

[Chris McAfee]

Or we can try calculating a moving average, that would
require stealing the data from gnuplot somehow and doing
some math.  Not impossible, but not a gnuplot two-liner.

Comment 3

[Sebastian Späth]

Unfortunately I don't know enough about Gnuplot to be helpful here. In a gnuplot
tutorial (http://www.duke.edu/~hpgavin/gnuplot.html) I found a curve-fitting
command and how to overlap two figures in one chart though.

Moving averages (maybe including 3 days of data?) seem to be fine for me.

Comment 4

[Chris McAfee]

description of five types of moving averages:
http://www.equis.com/free/taaz/movingaverages.html

Comment 5

[Chris McAfee]

Implemented!  I used a last-ten-points-including-this-one algorithm.
This is the Average: (on|off) part of the graph UI, the moving average
is the blue line.  I also decided to smooth out the average with
the bezier fit, since we are trying to show a trend I think smooth
lines would be a good thing here.  We can change this later if
we really want to see the real average.

Comment 6

[Sebastian Späth]

That is perfect, thanks mcafee!
Marking verified...