R help - Feb 2010 - Error in Aggregate function

Hi,

When I run the Aggregate function in repeat loop, I got the following error:

Error in sort.list(unique.default(x), na.last = TRUE) : 
  'x' must be atomic for 'sort.list'
Have you called 'sort' on a list?

How to solve this error. Anyone can help me. Urgent.

Thanks.
Meenakshi.
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Hi

r-help-bounces at r-project.org napsal dne 26.02.2010 10:32:34:
> 
> Hi,
> 
> When I run the Aggregate function in repeat loop, I got the following 
error:

Why and how exactly you use aggregate in loop?
> 
> Error in sort.list(unique.default(x), na.last = TRUE) : 
>   'x' must be atomic for 'sort.list'
> Have you called 'sort' on a list?
> 
> How to solve this error. Anyone can help me. Urgent.
Using this weird construction on my data I do not get any error.

for (i in 2:5) print(aggregate(zeta[,i], list(zeta[,"dus"]), mean)) 
  Group.1        x
1     ano 6.865000
2      ne 6.592727
  Group.1        x
1     ano 6.785000
2      ne 6.635455
  Group.1         x
1     ano 0.9426667
2      ne 0.5016364
  Group.1        x
1     ano 1.345167
2      ne 1.183727

Please provide at least a code, better with some simple fake data.

Regards
Petr



> 
> Thanks.
> Meenakshi.
> -- 
> View this message in context: http://n4.nabble.com/Error-in-Aggregate-
> function-tp1570370p1570370.html
> Sent from the R help mailing list archive at Nabble.com.
> 
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