Dive time histogram

I did my longest dive ever a few days ago, clocking in at 169 minutes...I was trying to collect enough snails to run this experiment. Similar to what I did when I logged my coldest dive ever, I am histogramming my dive log by dive time to see just how extreme this value is. The answer is: very.


I also looked at dive time by dive type. Here is a graph of scientific vs. recreational dive times. I have 170 scientific dives and 54 recreational dives logged, so I plotted frequency rather than absolute counts to get a better comparison of the distributions. They are quite different! It seems that my longest and shortest dives have been research dives, and the scientific dive distribution is much more spread out than the recreational dive distribution. Interestingly enough, they have similar medians that fall in the 40-50 min bin.

Temperature histogram

In commemoration of the coldest dive I have ever done in a wetsuit, this is a histogram of the water temperatures I have encountered throughout my 160+ dives. Red is for warm water dives (i.e. in a 3mm wetsuit or shorty) and blue is for cold water dives (7mm suit and hood).

At 5ºC, yesterday's dive was a full 3ºC below my previous low (~8ºC at Friday Harbor).

Histograms!!!

Okay, so it must be that none of my previous instructors have been cool enough to exploit the FULL RANGE OF DESCRIPTIVE STATISTICAL TOOLS on MyCourses because I have never seen this little function before. It is seriously awesome.

Behold the BIOL 28 grade histogram!!!

You can toggle the width of the bins (I think the allowed range is from 3 -65 bins). Below is the largest number of bins for which the interval labels are still readable (after this they kind of smoosh together and you just get vertical lines). I won't say how long I spent toggling them back and forth...
So...apart from being awesome by scanning and grading every single exam (of 255) the same day they were taken, the biochemistry instructors win because they have histograms I can play with.