Writing Basic DATA Steps

Understanding DATA Step Processing

Writing Basic DATA Steps

If you completed the prerequisites for this module, you learned how to write a DATA step to create a permanent SAS data set from raw data in an external file.

     data clinic.stress;
        infile tests;
        input ID 1-4 Name $ 6-25 RestHR 27-29
              MaxHR 31-33 RecHR 35-37
              TimeMin 39-40 TimeSec 42-43
              Tolerance $ 45;
     run;

Raw Data File Tests

1---+----10---+----20---+----30---+----40---+-

2458 Murray, W           72   185 128 12 38 D

2462 Almers, C           68   171 133 10  5 I

2501 Bonaventure, T      78   177 139 11 13 I

2523 Johnson, R          69   162 114  9 42 S

2539 LaMance, K          75   168 141 11 46 D

2544 Jones, M            79   187 136 12 26 N

2552 Reberson, P         69   158 139 15 41 D

2555 King, E             70   167 122 13 13 I

1---+----10---+----20---+----30---+----40---+-
2458 Murray, W 72 185 128 12 38 D
2462 Almers, C 68 171 133 10 5 I
2501 Bonaventure, T 78 177 139 11 13 I
2523 Johnson, R 69 162 114 9 42 S
2539 LaMance, K 75 168 141 11 46 D
2544 Jones, M 79 187 136 12 26 N
2552 Reberson, P 69 158 139 15 41 D
2555 King, E 70 167 122 13 13 I

You learned how to submit the DATA step and check the log to see if the step ran successfully.

SAS Log

NOTE: The infile TESTS is: FILENAME=may/t1/rawdata.dat Code=V Type=C _ERROR_=0 _N_=4 NOTE: 10 records were read from the infile TESTS. NOTE: The data set CLINIC.STRESS has 10 observations and 8 variables. NOTE: The DATA statement used 0:00:07.00 real 0:00:07.10 cpu.

You also learned how to display the contents of the data set by using the PRINT procedure.
proc print data=clinic.stress; run;

Obs ID Name RestHR MaxHR RecHR TimeMin TimeSec Tolerance

1 2458 Murray, W 72 185 128 12 38 D

2 2462 Almers, C 68 171 133 10 5 I

3 2501 Bonaventure, T 78 177 139 11 13 I

4 2523 Johnson, R 69 162 114 9 42 S

5 2539 LaMance, K 75 168 141 11 46 D

6 2544 Jones, M 79 187 136 12 26 N

7 2552 Reberson, P 69 158 139 15 41 D

8 2555 King, E 70 167 122 13 13 I

Obs	ID	Name	RestHR	MaxHR	RecHR	TimeMin	TimeSec	Tolerance
1	2458	Murray, W	72	185	128	12	38	D
2	2462	Almers, C	68	171	133	10	5	I
3	2501	Bonaventure, T	78	177	139	11	13	I
4	2523	Johnson, R	69	162	114	9	42	S
5	2539	LaMance, K	75	168	141	11	46	D
6	2544	Jones, M	79	187	136	12	26	N
7	2552	Reberson, P	69	158	139	15	41	D
8	2555	King, E	70	167	122	13	13	I