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visit_no
2007 Jun 26
1
A really simple data manipulation example
In response to those who asked for a better explanation of what the
Vilno software does, here's a simple example that gives some idea of
what it does.
LABRESULTS is a dataset with multiple rows per patient , with lab
sodium measurements. It has columns: PATIENT_ID, VISIT_NUM, and
SODIUM.
DEMO is a dataset with one row per patient, with demographic data.
It has columns: PATIENT_ID, GENDER.
Here's a simple example, the following paragraph of code is a
data processing function (dpf) :
inlist LABRESULTS DEMO ;
mergeby PATIENT_ID ;
if (SODIUM == -9) SODIUM = NULL ;...