Statistics code for desktop (and soon mobile)

Fri Jan 8 14:32:15 PST 2021

Are there cool ‘recipes’ that should be available by default?   SAC rate
over time binned by water temperature, things like that?

-bill

On Fri, Jan 8, 2021 at 5:25 PM Christof Arnosti via subsurface <
subsurface at subsurface-divelog.org> wrote:

> Same here. I just did give it a second go with the current AppImage (which
> works perfectly now). I didn't find anything "buggy" and there isn't much
> to complain about (the most German compliment ever). I like it! :-)
>
> I don't have too many dives (86), and everything is open circuit, so it's
> maybe a bit harder to get interesting statistics, but I did find:
>
>    - My SAC sucks and didn't get much better over the years, but gets
>    better at the end of the holidays. And less SAC in warmer water (makes
>    sense, but I didn't think about it before I played around here)
>    - Dives with a higher max depth are shorter (duh)
>    - Buddy counts (Interesting!), total and over the years.
>    - In my first year I had a suspicious high number of dives reaching
>    exactly 18 meters...
>    - And lots of other interesting insights.
>
> It's really a nice feature to play around! But now I want to go diving :-(
>
> Some Questions and remarks:
>
>    - When I select date(yearly) as base variable and buddies as data, bar
>    charts have a yellow warning in the drop down. Why's that?
>    - The trend line does not always appear in the scatter graph. For
>    example, when I select date (no binning) / depth, there is no trend line,
>    except for when I filter out very shallow depths. For water temp over date
>    I get a trend line right away. I'm sure that's correct and there is a
>    statistical reason for this that I'm not aware of.
>    - When I select Buddies over Date(yearly), and then grouped vertical
>    bar chart, the bars are oddly spaced. I suspect that for every buddy there
>    is a bar every year, even if the number is zero. This might make sense in
>    some cases (for example water temperature), but in the buddy case it looks
>    weird. Maybe add some "don't show empty bars" option for the grouped bar
>    charts?
>    - Is there some Export functionality planned? For example simple image
>    export of the graph?
>    - For me the Filter GUI seems a bit unintuitive. When there is no
>    constraint present, it's not very obvious that constraints can be added
>    (the button is in an odd place). A change to make it more obvious could be
>    to add a "Constraints" heading below the fulltext search, and move the
>    button there? And maybe also display a "No constraints" text when no
>    constraint is set? I really like the "Filter sets" functionality!
>    - What I didn't find was an "Average depth" variable, this would maybe
>    also be interesting to add.
>    - "Dive number" as Base Variable would maybe make sense to show
>    changes over number of dives. This would be interesting for me since I go
>    diving once or maybe twice a year, so when I use non-binned date as base
>    variable, there are basically vertical lines in the scatter plot (see
>    below).
>
> What would be really nice, but might be complicated to implement, would be
> to have a kind of "Zoom" or "Select" possibility to add constraints. For
> example my Depth over Date Scattergraph looks like this:
>
> Now to have a look at a single holiday I can add a constraint over a range
> of dates, for example 1.1.2017 to 1.1.2018. This works fine! But the cherry
> on top would be if I could simply drag a rectangle over the points in 2017,
> and set the constraints like this (Sort of a "Zoom into range"
> functionality).
>
> Best regards
>
>
> Christof
> On 08.01.21 21:42, Martin de Weger via subsurface wrote:
>
> I have played with it a bit, and it looks great. I haven’t looked into it
> deep enough to say I actually tested it.
>
>
> Op 8 jan. 2021 om 21:33 heeft Dirk Hohndel via subsurface
> <subsurface at subsurface-divelog.org> <subsurface at subsurface-divelog.org>
> het volgende geschreven:
>
> 
>
> On Jan 3, 2021, at 5:17 PM, Dirk Hohndel <dirk at hohndel.org> wrote:
>
>
>
> On Jan 3, 2021, at 3:44 PM, Dirk Hohndel via subsurface <
> subsurface at subsurface-divelog.org> wrote:
>
> Right, I didn't test the AppImage. Silly me. I'll add that to my list.
>
>
> AppImage is fixed, also Subsurface now reacts more gracefully if the
> QtCharts QML modules can't be found.
> Instead of a crash the statistics chart is simply empty. What we really
> need is a reasonable error message (or alternative disable the statistics
> entry in the menu.
> But this is at least a step in the right direction.
>
> New AppImage should appear in downloads/test in the next few minutes
> as Subsurface-v4.9.10-235-gc63994f77-x86_64.AppImage
> This one was tested on a couple of different Linux flavors...
>
>
> So we have working binaries for all platforms, but we have heard basically
> no feedback on the new statistics feature.
> No indication that anyone has tested this, likes it, hates it, has
> suggestions.
>
> It's really hard to develop in a vacuum. And it's a bit frustrating, too.
>
> I know that guilt-tripping people into doing things simply doesn't work.
> Berthold, Willem, and I will continue to just work along.
> But we sure would appreciate some input. Even if it is just a simple "this
> is the best software ever written in the universe"...
>
> Thanks and have a great weekend
>
> /D
>
>
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