Message-ID: <C1F4E0C5-C806-43D4-97DA-84A1144D9725@gmail.com>
Date: 2013-12-20T17:38:02Z
From: Onur Uncu
Subject: by class...
I used the by() function on a data.frame to get sums of the data grouped by 2 factors. The function worked however the output is in a class called 'by'. Not familiar with this class. How can I turn the output into a nice table where columns represent values of factor1, row represent values of factor2 and the entries in the table are the sums that were calculated using the by function?
I did some web search which suggested using do.call(rbind, datframe_object) but this command gave the following error:
"Second argument must be a list"...
Thank you.