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Calculations for stat graph?

From: Carsten Johnsen <cjo_at_kirktelecom.com>
Date: 2006-07-14 11:07:42 CEST

Hi dev@

I was looking at the stat graph today and something looks wrong to me...

The first thing I did was to upgrade to latest nightly: TortoiseSVN 1.4.0, Build 7023 - 32 Bit -dev
This didn't remove the problem, and I couldn't find anything in flyspray.

The problem:
When showing the the statistics graph by date, it looks like the new summation with the new dynamic increment makes a wrong calculation.

I've used the TortoiseSVN repo for the example, so it should be easily reproduceable.

Rightclick TSVN trunk and chose "show log..."
Click "Show all" button
Click "Statistics" button
Select "Commits by date" view (see attached stats.png)
The graph looks a bit funny. It looks like the has been very few commits in Q4 of any year.
I then tried looking at the log, and it doesn't show this behaviour.
I've added the commits from then points in the graph, and I also counted the number of commits in the log dialog.

        Graph Log Delta
Q1/05 637 637 0
Q2/05 1048 830 +218
Q3/05 983 681 +302
Q4/05 245 765 -520
Q1/06 768 768 0
Sum 3681 3681 0

It looks like Q1/05 and Q1/06 are correct, but the three other quarters are wrong (this looks to be the case no matter what year I focus on). When looking at a full year the value looks to be OK.

I've done a bit of digging, and I found out that when looking at the log from 2005-04-01 and 1048 commits ahead (equals Q2/05 in the graph) this number is reached at 2005-07-31 sĺ the graph counts in an extra month (M4/05-M7/05)
From 2005-08-01 and 983 commits ahead shows 2005-11-30, so this is shifted one month, and counts in one extra month as well (M8/05-M11/05).
And of course the 245 commits shown in the graph for Q4/05 only covers M12/05.

Unfortunately I'm no expert at C++ (I normally deal with Delphi), so I'm no good at correcting this myself, but I tried to make the report as accurate as possible.

If you need any more information please let me know, and I will be happy to help.
This is not a major issue for me, I'm just sending this mail to help get rid of small glitches, in this otherwise fantastic software. - Thanks for an excellent job...

Btw: I like the new view with the dynamic increment on the X-axis - esspecially now that the labels are correct :o)
 

Best regards / Venlig hilsen,

Carsten Johnsen
Test Engineer

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Stats.png
Received on Fri Jul 14 11:07:58 2006

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