Sam -
Since the error message said the argument wasn't numeric
or logical, that would be the source of your problem. What
is the result of
class(all$Value)
If it's 'character' or 'factor', that would explain the problem.
Provide more details for a (most likely) easy solution.
- Phil Spector
Statistical Computing Facility
Department of Statistics
UC Berkeley
spec...@stat.berkeley.edu
On Tue, 15 Feb 2011, Sam Steingold wrote:
* Sam Steingold <f...@tah.bet> [2011-02-14 18:42:40 -0500]:
byFOO$Mean <- aggregate(all$Value, by = list(all$FOO), FUN = mean)$x;
this fails with
There were 50 or more warnings (use warnings() to see the first 50)
warnings()
Warning messages:
1: In mean.default(X[[1L]], ...) :
argument is not numeric or logical: returning NA
2: In mean.default(X[[2L]], ...) :
argument is not numeric or logical: returning NA
3: In mean.default(X[[3L]], ...) :
argument is not numeric or logical: returning NA
4: In mean.default(X[[4L]], ...) :
argument is not numeric or logical: returning NA
5: In mean.default(X[[5L]], ...) :
argument is not numeric or logical: returning NA
note that there are absolutely no NAs in all$Value:
all(!is.na(all$Value))
[1] TRUE
--
Sam Steingold (http://sds.podval.org/) on CentOS release 5.3 (Final)
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