May be this help you; Just intall.packages("sqldf", dependencies=T)


require(sqldf)
my_df<-data.frame(cbind(gender=sample(c("male","female"),50,replace=T),
age=round(rnorm(50, mean=30, sd=5),0)))

my_df_subset_male<-sqldf("select * from my_df where gender=='male'")
my_df_subset_male

my_df_subset_male_greater35<-sqldf("select * from my_df where gender=='male'
and age>35")
my_df_subset_male_greater35


Good luck

miltinho astronauta

brazil



On 7/22/08, rlearner309 <unixunix99@gmail.com> wrote:
>
>
> I have a question about how to filter the data frame:
> Suppose my data frame has variables like gender, age,... How to get a
> subset
> of the data frame, with only female (or male) and/or age > 50...?  What is
> the typical syntax?  I tried several condition expressions, but none of
> them
> worked...
>
> Thanks a lot!
> --
> View this message in context:
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> Sent from the R help mailing list archive at Nabble.com.
>
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