On Mon, 24 Oct 2011, B77S wrote:
Why not format the data like this:
site sampledate SO4 TDS NA Mg Cond Cl Ca
Because I don't know how to reformat the base data frame (chemdata) to
achieve this.
It seems to me that you summary doesn't make any sense. Those quantiles
are meaningless as they encompass all the parameters. Am I missing
something?
One site/sampdate/param has one value associated with it.
82 BC-0.5 1996-06-02 SO4 194.00
83 BC-0.5 1996-06-02 TDS 530.00
6903 BC-2 1994-07-25 Cond 826.00
6905 BC-4 1996-08-23 SO4 36.00
6977 BC-2 1994-10-19 Cond 848.00
6980 BC-2 1995-03-16 Cond 1795.00
6983 BC-2 1995-06-21 Cond 640.00
7833 BC-3 1994-01-20 Cond 406.00
7838 BC-3 1994-02-17 Cond 401.00
7847 BC-3 1994-03-24 Cond 441.00
7854 BC-3 1994-06-13 Cond 400.00
7866 BC-3 1994-07-25 Cond 393.00
7871 BC-3 1994-08-18 Cond 420.00
7877 BC-3 1994-10-20 Cond 438.00
I acknowledge that if the chemicals ('param') were in a vector, their
associated
concentrations ('quant') in another vector following it, and both associated
with a site and sampdate life would be much better.
Thanks,
Rich
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