Hello,
When using hist() with a POSIXt date that has 00 seconds an error is
produced. For example
> hist(as.POSIXlt("2010-07-01 00:00:00"), breaks="mins")
Error in seq_len(1L + max(which(breaks < maxx))) :
argument must be coercible to non-negative integer
In addition: Warning message:
In max(which(breaks < maxx)) :
no non-missing arguments to max; returning -Inf
> hist(as.POSIXlt("2010-07-01 10:10:00"), breaks="mins")
Error in seq_len(1L + max(which(breaks < maxx))) :
argument must be coercible to non-negative integer
In addition: Warning message:
In max(which(breaks < maxx)) :
no non-missing arguments to max; returning -Inf
When adding one second, it completes successfully.
> hist(as.POSIXlt("2010-07-01 00:00:01"), breaks="mins")
> hist(as.POSIXlt("2010-07-01 10:10:01"), breaks="mins")
The error is produced when breaks is either secs, mins, hours, or day, but
does not occur with year, month or week.
I realise a histogram of one element is not useful, however, the errors
produced seem inconsistent. Is this expected behaviour?
This maybe useful:
> sessionInfo()
R version 3.0.1 (2013-05-16)
Platform: x86_64-w64-mingw32/x64 (64-bit)
locale:
[1] LC_COLLATE=English_United Kingdom.1252 LC_CTYPE=English_United
Kingdom.1252
[3] LC_MONETARY=English_United Kingdom.1252 LC_NUMERIC=C
[5] LC_TIME=English_United Kingdom.1252
attached base packages:
[1] stats graphics grDevices utils datasets methods base
loaded via a namespace (and not attached):
[1] tools_3.0.1
Best wishes
Steve
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