Displaying 1 result from an estimated 1 matches for "weight_obs".
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weight_lbs
2009 Jan 27
1
Creating list or numeric vectors out of selected columns of row oriented data
...ate does
not change, but the obeservation_date and the three different
observations change between rows. (There is one row for each day for
each subject over a three year period although some entered the study
late):
'subject_id', 'start_date','observation_date','weight_obs',
'activity_obs','calories_obs'
1,'1/1/2005','1/1/2005',3.26,'a',93
1,'1/1/2005','1/2/2005',3.22,'o',85
1,'1/1/2005','1/3/2005',3.28,'o',91
...
1,'1/1/2005','12/31/2008',4.38,'h',10...