How to randomly select a single measurement of each individuals from a repeated measurement data? My original data is in shape of 'test' and resulting data would look like 'want' except its observations randomly populated.
data test;
input ID Age_at_measurement_right Age_at_measurement_left;
cards;
3232 1.1 1.5
3232 19.3 18.3
3232 33.2 32.1
3236 1.2 1.6
3236 16.2 13.2
3236 23.1 22.1
3266 1.5 1.3
3266 19.3 18.3
3266 33.1 32.3
;
data want;
input ID Age_at_measurement_right Age_at_measurement_left;
cards;
3232 19.3 18.3
3236 23.1 22.1
3266 1.5 1.3
;
Two common approaches:
PROC SURVEYSELECT with N=1 and stratify on GROUP.
Two common approaches:
PROC SURVEYSELECT with N=1 and stratify on GROUP.
Hi Reeza, below code worked out. Please let me know if it looks not quite right. Hope I got it.
PROC SURVEYSELECT data=test
method=srs n=1
seed=1235 out=test_sample;
strata id;
run;
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