Displaying 1 result from an estimated 1 matches for "presidential_map".
2012 Oct 22
6
How to use tapply with more than one variables grouped
...ta preparation. I found a course at
MIT for data preparation that uses python but I'm using R to learning. The
first exercise is the preparation of data from a database that shows the
contributions made to candidates for U.S. president. The database is
described in FORMART
ftp://ftp.fec.gov/FEC/Presidential_Map/2012/DATA_DICTIONARIES/CONTRIBUTOR_FORMAT.txt
link. I wonder how to print the table showing how many states are President
Obama the top candidate (by full amount of donations received) with R
language?
I try using tapply method but, i dont understand how to working with more
than one variable grou...