> -----Original Message-----
> From: [email protected] [mailto:owner-
> [email protected]] On Behalf Of G. ter Riet
> Sent: Friday, December 17, 2004 2:20 AM
> To: [email protected]
> Subject: st: RE: reshaping a data file: cell frequency = number of rows in
> the new data set
>
> Hi Scott,
> I apologize. To answer your question,
> now the data are structured as (data editor view)
> a b c d
> 1 2 3 4
> where a thru' d are the variable names denoting the cell frequencies;
> a=true positive test results; b=false positives; c=false negatives;
> d=true negatives.
>
> Gerben ter Riet, MD PhD, Amsterdam
>
Here is one way to accomplish this:
. l , noobs
+-------------------+
| tp fp fn tn |
|-------------------|
| 1 2 3 4 |
+-------------------+
. xpose, clear varname
. expand v1
(6 observations created)
. sort v
. rename _v gold
. mark v2 if gold =="tp" | gold == "fn"
. l , noobs
+----------------+
| v1 gold v2 |
|----------------|
| 1 tp 1 |
| 2 fp 0 |
| 2 fp 0 |
| 3 fn 1 |
| 3 fn 1 |
|----------------|
| 3 fn 1 |
| 4 tn 0 |
| 4 tn 0 |
| 4 tn 0 |
| 4 tn 0 |
+----------------+
Keep in mind that -xpose, clear- will drop any string variables.
Hope this helps,
Scott
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