[R] Data Manipulation

[Joshua Wiley]

Hi,

Yes, the table() function is not to read the data, but to do the
frequency counts of each level.  I just included the read.table() part
so that you could copy and paste my code, but I did not include the R
output from table(dat).

> table(dat)
dat
A B C D
3 3 2 1

It nicely tallies for you.  Also, you can look at a simple plot:

# you will have to run this in your R
# because I do not know an easy way to include graphs
plot(table(dat))

You can also save the results in a new variable and then access portions of it:

> my.table <- table(dat)
> my.table # the full table
dat
A B C D
3 3 2 1
> my.table[2] # just extract the second element
B
3
>

Cheers,

Josh

On Fri, Sep 10, 2010 at 9:11 AM, dfong <dfong at medicine.umaryland.edu> wrote:
>
> I'm actually importing it from a CSV, so I already have that in a table. But
> i Can't make a graph with text. I assume I need to do some counting in order
> to draw the graph?
> Any example of this?
>
> thanks
> --
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-- 
Joshua Wiley
Ph.D. Student, Health Psychology
University of California, Los Angeles
http://www.joshuawiley.com/