Error in if (n > 0)
On Aug 22, 2012, at 3:26 PM, Rich Shepard wrote:
I've searched the Web with Google and do not find what might cause this particular error from an invocation of cenboxplot: cenboxplot(cu.t$quant, cu.t$ceneq1, cu.t$era, range=1.5, main='Total Recoverable Copper', ylab='Concentration (mg/L)', xlab='Time Period') Error in if (n > 0) (1L:n - a)/(n + 1 - 2 * a) else numeric() : argument is of length zero I do not an observation with a concentration of zero; the only zeros are the lower limits for censored observations.
It is not saying there are zero values for concentration.... it is
saying there are groups with zero elements:
> table(cu.t$ceneq1, cu.t$era)
Mining Pre-mining
FALSE 723 0
TRUE 183 9
The dput() output of the data frame 'cu.t' is attached.
David Winsemius, MD Alameda, CA, USA