Re: [R] data frame to frequencies

2012-05-30 Thread David Winsemius
On May 30, 2012, at 4:51 PM, R. Michael Weylandt wrote: I think you're looking for xtabs [see the examples; they're quite good] but I can't be sure: your printed object can't really exist in R so I'm not sure what you have currently. Michael On Wed, May 30, 2012 at 3:25 PM, cassiorx wrote:

Re: [R] data frame to frequencies

2012-05-30 Thread R. Michael Weylandt
I think you're looking for xtabs [see the examples; they're quite good] but I can't be sure: your printed object can't really exist in R so I'm not sure what you have currently. Michael On Wed, May 30, 2012 at 3:25 PM, cassiorx wrote: > I have a data frame that has columns Semester, Student ID (

[R] data frame to frequencies

2012-05-30 Thread cassiorx
I have a data frame that has columns Semester, Student ID (SID), Subject, Grade, Devel (Tor F). Students can have multiple records within a semester. Right now, the columns are not considered factors. I want to do an analysis that would show the number of students who received particular combinat