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$\begingroup$ GroupBy was introduced in version 10 and I'm still running v9 (as v10 refuses to install on my system for some reason), so I can't test this. $\endgroup$

SPPearce
– SPPearce

2015-06-19 08:14:52 +00:00
Commented Jun 19, 2015 at 8:14
$\begingroup$ @KraZug v10 introduces also Association and Dataset which should be efficient to handle large data sets (see doc here and here) and which "work" with GroupBy (as you can see the output here). It is worth to upgrade if you can. You should contact Wolfram support or maybe post your install problem here on MSE ;) $\endgroup$

SquareOne
– SquareOne

2015-06-19 09:57:06 +00:00
Commented Jun 19, 2015 at 9:57

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