[R] logical test not functioning correctly on zoo series...what the hell?

[knavero]

"If you showed the output of dput(yourData) or even str(yourData)
others could see what types the columns are.  Ordinary printed output can
make numeric, character, and factor data look the same.  Comparisons
involving strings do not always return the same value as comparisons
involving the equivalent numbers.  E.g.,

  > y <- c("0.00", "0.01", "10.1", "20.2", "0.00")
  > z <- zoo(y, as.POSIXct("2012-03-14")+(1:5)*24*60*60)
  > z # looks like numeric data, but it is not
  2012-03-15 2012-03-16 2012-03-17 2012-03-18 2012-03-19
        0.00       0.01       10.1       20.2       0.00
  > str(z)
  'zoo' series from 2012-03-15 to 2012-03-19
    Data: chr [1:5] "0.00" "0.01" "10.1" "20.2" "0.00"
    Index:  POSIXct[1:5], format: "2012-03-15" "2012-03-16" "2012-03-17"
"2012-03-18" "2012-03-19"
  > z[z>0]
  2012-03-15 2012-03-16 2012-03-17 2012-03-18 2012-03-19
        0.00       0.01       10.1       20.2       0.00
  > z[z>"0.00"]
  2012-03-16 2012-03-17 2012-03-18
        0.01       10.1       20.2
  > "0.0" > 0
  [1] TRUE "

Ah I see. So it's seeing the ASCII values I'm assuming. Yeah, I think this
was the case I was running into. It seems it's just dependent on the raw
data because recently when I was reading in raw data as zoo, this didn't
happen. However, my dput results show quoted values, technically strings.
Thank you for pointing this out. I'll remember to use dput next time. Noob
mistake. Won't happen again.

--
View this message in context: http://r.789695.n4.nabble.com/logical-test-not-functioning-correctly-on-zoo-series-what-the-hell-tp4471654p4473057.html
Sent from the R help mailing list archive at Nabble.com.