[R] How to calculate words in column?
edwin7 at web.de
Sat Dec 6 17:30:29 CET 2008
I have a table for an 1 week exam result for many classes in school, like
Day Class_ID Test Result
1 Monday 1 Paper Passed
2 Tuesday 1 Oral Passed
3 Friday 1 Paper Passed
4 Monday 3 Paper Passed
5 Sunday 3 Oral Passed
6 Monday 3 Paper Passed
6 Sunday 3 Paper Passed
How can I sum the Word "Passed" from Result column ( for earch Class_ID and
each Test), so i can get this following table:
Class_ID Test Passed_Count
1 1 Paper 2
2 1 Oral 1
3 3 Oral 1
4 3 Paper 3
Passed_Count column is just the Value, how many people passed the exam. In the
tabell, they are 2 people passed the paper test (Result=Passed).
I hope someone can help me, Or maybe there is an example that i can see.
Thank you in advance
More information about the R-help