Working with Time Series Data |
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Computing Datetime Values
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To compute datetime ID values from calendar and time variables, first compute the date and then compute the datetime with DHMS.
For example, suppose you read tri-hourly temperature data with time recorded as YEAR, MONTH, DAY, and HOUR. The following statements show how to compute the ID variable DATETIME:
data weather;
input year month day hour temp;
datetime = dhms( mdy( month, day, year ), hour, 0, 0 );
format datetime datetime10.;
datalines;
91 10 16 21 61
91 10 17 0 56
91 10 17 3 53
... more lines ...
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