RFC: Statistics in Subsurface

[Dirk Hohndel]

That is excellent input!

Your final point is one that I had kinda assumed - most of the "more interesting" data no one but a geek will look into. And to them either box and whiskers (so quartiles) or at least floating box with mean (or your version in the first SAC chart below with the 0 based box with the mean as height and with whiskers for min/max) should make sense. But it also makes sense to look for simper ways to give access to the same data. Can you give an example for the "line graph with 3 lines for min/mean/max"?

Thanks

/D

> On May 13, 2020, at 10:20 AM, Hartley Horwitz via subsurface <subsurface at subsurface-divelog.org> wrote:
> 
> I showed these plots to a colleague of mine - a non-diver, but someone who uses Strava and likes to plot his running progress.
> 
> * The first box plot with whiskers wasn't understood by him.
> * the second bar graph was understandable, but similar to Dirk, he asked for x and y axis to be flipped
> * he wasn't sure how to interpret the "dot" in the 3rd graph.  I explained it was just a variation of the bar graph.
> 
> * I showed him a more traditional box & whisker plot, and he didn't understand that.
> * I showed him a line graph with 3 lines: min, mean, max.  That he understood.
> 
> This is someone who didn't take a statistics course in college/university.
> 
> I've also attached a quick visualization on histogram vs box & whiskers.  A histogram has a familiarity to it because it is just a series of bar graphs.  It isn't compact though.  The box and whiskers is the same as a flipping a histogram on its side and then summarizing the quartiles, mean and outliers. Cool, compact, not familiar to many though. 
>  
> Now to argue against myself, maybe the only people who will look at statistics are those that love statistics and so we should target that audience, in which case box & whiskers has my vote. 
> 
> 
> 
> 
> ---------- Forwarded message ----------
> From: Pedro Neves <nevesdiver at gmail.com <mailto:nevesdiver at gmail.com>>
> To: subsurface at subsurface-divelog.org <mailto:subsurface at subsurface-divelog.org>
> Cc: 
> Bcc: 
> Date: Wed, 13 May 2020 14:26:07 +0100
> Subject: Re: RFC: Statistics in Subsurface
> Adding my comments to this discussion...
> 
> Attached you'll find a list of the stats I currently have for my logs. I 
> use the csv export facility and do everything in R, using RMarkdown. The 
> only thing missing so far is the SAC analysis, because Subsurface 
> doesn't (yet) exports the SAC.
> 
> The file Subsurface_stats.pdf gives an idea of the kind on analysis I do 
> (just basic stuff, really) and the PLots.pdf file show a few 
> visualization ideas for some of the stats. I do not mean to impose on 
> any one else's ideas - It's just an attempt to maybe summarize and help 
> the discussion. While other users might have different needs, I think 
> the basic stats are covered...
> 
> I hope this helps...
> 
> Cheers:
> 
> Pedro
> 
> 
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