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NADA Data Frame Format: Wide or Long?

MacQueen, Don 
I haven't used NADA functions in quite a while, but from what I recall,
you will likely be using the "narrow" format, and sub-setting as needed
for the different analytes.

As Jean suggested, the examples in the help pages for the NADA function(s)
of interest should make it clear.

This example follows exactly the example in ?cenros.

  with( subset(yourdataframe, param=='Ag'),  cenros(quant,ceneq1) )

This should do a simple censored summary statistica calculation for silver
(assuming quant contains your reporting level for censored results, which
appears to be the case).

I'd also suggest you try to load your data so that site and param are not
factors, though this could depend on your ultimate analysis.

-Don

Thread (6 messages)

Rich Shepard NADA Data Frame Format: Wide or Long? Jul 3 Jean V Adams NADA Data Frame Format: Wide or Long? Jul 5 MacQueen, Don NADA Data Frame Format: Wide or Long? Jul 5 Rich Shepard NADA Data Frame Format: Wide or Long? Jul 5 MacQueen, Don NADA Data Frame Format: Wide or Long? Jul 6 Rich Shepard NADA Data Frame Format: Wide or Long? Jul 7