On Thu, 27 Oct 2011, Rich Shepard wrote:

 So I did the conversion and melting the long way:
tds.a <- tds.anal
tds.a$sampdate <- factor(tds.a$sampdate)

  I didn't copy the melt command:

  tds.anal.m <- melt(tds.a)
However, ...

c.tds.anal <- dcast(tds.a, site + sampdate ~ param, value_var = 'quant')

  And the above was actually

  c.tds.anal <- dcast(m.tds.anal ...) but produces the same error.

Rich

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