[julia-users] Re: Grouping - Dataframes

[Jeff Waller]

On Sunday, February 22, 2015 at 4:07:48 PM UTC-5, Philip Sivyer wrote:
>
> Hi
> I get 
> ":Col1 anonymous function))" when I try *(df,:Col1,x->sum(x[:Col2]))*
> Any ideas.
> Will take a look at the link in a minute
> Regards
>
>
you forgot the "by"