Repeated measure with duplicate observations

desireatem — Tue, 27 Mar 2018 00:13:36 GMT

I have this repeated measure with varying duplicate observation. I wish to make sure for each id, there is just one timepoint. Below is the data and corrected version (bold). I just one observation for each timepoint by sid

SID	NPiL	SizeL	timepoint
200001	3.8	.	1
200001	3.8	.	1
200001	3.8	.	1
200001	3.8	.	1
200001	3.8	.	1
200001	3.8	4.99	1
200001	3.8	4.89	2
200001	3.8	4.89	2
200001	3.8	4.89	2
200001	3.8	4.89	2
200001	3.8	4.89	2
200001	3.8	4.89	2
200001	4.3	4.22	3
200001	4.3	4.22	3
200001	4.3	4.22	3
200001	4.3	4.22	3
200001	4.3	4.22	3
200001	4.3	4.22	3
200001	4.2	4.25	4
200001	4.2	4.25	4
200001	4.2	4.25	4
200001	4.2	4.25	4
200001	4.2	4.25	4
200001	4.2	4.25	4
200001	4.1	5.71	5
200001	4.1	5.71	5
200001	4.1	5.71	5
200001	4.1	5.71	5
200001	4.1	5.71	5
200001	4.1	5.71	5
200001	3.9	4.96	6
200001	3.9	4.96	6
200001	3.9	4.96	6
200001	3.9	4.96	6
200001	3.9	4.96	6
200001	3.9	4.96	6
200001	4.1	5.17	7
200001	4.1	5.17	7
200001	4.1	5.17	7
200001	4.1	5.17	7
200001	4.1	5.17	7
200001	4.1	5.17	7
200001	3.5	4.71	8
200001	3.5	4.71	8
200001	3.5	4.71	8
200001	3.5	4.71	8
200001	3.5	4.71	8
200001	3.5	4.71	8
200001	3.1	5.36	9
200001	3.1	5.36	9
200001	3.1	5.36	9
200001	3.1	5.36	9
200001	3.1	5.36	9
200001	3.1	5.36	9
200001	2.4	5.81	10
200001	2.4	5.81	10
200001	2.4	5.81	10
200001	2.4	5.81	10
200001	2.4	5.81	10
200001	2.4	5.81	10
200001	3.1	5.78	11
200001	3.1	5.78	11
200001	3.1	5.78	11
200001	3.1	5.78	11
200001	3.1	5.78	11
200001	3.1	5.78	11
200001	2.9	5.5	12
200001	2.9	5.5	12
200001	2.9	5.5	12
200001	2.9	5.5	12
200001	2.9	5.5	12
200001	2.9	5.5	12
200001	2.4	6.04	13
200001	2.4	6.04	13
200001	2.4	6.04	13
200001	2.4	6.04	13
200001	2.4	6.04	13
200001	2.4	6.04	13
200001	2.6	6.24	14
200001	2.6	6.24	14
200001	2.6	6.24	14
200001	2.6	6.24	14
200001	2.6	6.24	14
200001	2.6	6.24	14
200001	3	5.42	15
200001	3	5.42	15
200001	3	5.42	15
200001	3	5.42	15
200001	3	5.42	15
200001	3	5.42	15
200001	4.2	3.58	16
200001	4.2	3.58	16
200001	4.2	3.58	16
200001	4.2	3.58	16
200001	4.2	3.58	16
200001	4.2	3.58	16
200001	2.8	6.08	17
200001	2.8	6.08	17
200001	2.8	6.08	17
200001	2.8	6.08	17
200001	2.8	6.08	17


corrected data


SID	NPiL	SizeL	timepoint
200001	3.8	.	1
200001	3.8	4.89	2
200001	4.3	4.22	3
200001	4.2	4.25	4
200001	4.1	5.71	5
200001	3.9	4.96	6
200001	4.1	5.17	7
200001	3.5	4.71	8
200001	3.1	5.36	9
200001	2.4	5.81	10
200001	3.1	5.78	11
200001	2.9	5.5	12
200001	2.4	6.04	13
200001	2.6	6.24	14
200001	3	5.42	15
200001	4.2	3.58	16
200001	2.8	6.08	17

Re: Repeated measure with duplicate observations

TomKari — Tue, 27 Mar 2018 14:03:39 GMT

Assuming your observations are sorted by SID and timepoint, and that you always want the first observation of the group, this should do it.

Tom

data want;
	set have;
	by SID timepoint;

	if first.timepoint;
run;

Re: Repeated measure with duplicate observations

SASUser_22 — Tue, 27 Mar 2018 19:07:00 GMT

proc sort data = dataset1 nodupkey;

by timepoint;

run;

topic Re: Repeated measure with duplicate observations in SAS Data Management

Repeated measure with duplicate observations

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