[R] need descriptive help

[Bert Gunter]

1. Before you post to this list again, please read "An Introd to R" --
or other basic R tutorial. "Intro" ships with every R installation.
There's a reason for this -- to avoid badgering this list with basic R
queries that minimal homework could answer.

2. However, see also ?table and links therein.

3. "?"[" and ?subset are also relevant.

-- Bert

On Tue, Jun 5, 2012 at 8:34 AM, mkm1616 <mkm1616 at gmail.com> wrote:
> Hi all, I'm new to using R, and apologize for simplicity of this
> question.
>
> I'm using a data set with over 60,000 observations, Two variables are
> patient ID, and cost incurred by the patient.  I'd like to generate
> frequency/table by patient and cost IF the total cost is over 2000.
>
> Right now I'm using:
>
> by(x$cost, x$patient, sum)
>
> but this generates a huge list for each patient.
>
> What is the best way to either (1) export the output into a csv so I
> can visually inspect each patient or more helpful (2) create the table
> IF sum of cost > 1000
>
> Thanks!
>
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-- 

Bert Gunter
Genentech Nonclinical Biostatistics

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