DT_TO_VAR Procedure

Standard Library procedure that converts a date/time variable to regular numerical data.

DT_TO_VAR, dt_var

dt_var A date/time variable.

Year Specifies an integer variable to contain the years.

Month Specifies a byte variable to contain the months.

Day Specifies a byte variable to contain the days of the month.

Hour Specifies a byte variable to contain the hours.

Minute Specifies a byte variable contain the minutes.

Second Specifies a floating-point variable to contain the seconds and fractional seconds.

Use one or more keywords to specify the kind of output produced by this pr1ocedure. For example, to create a new variable containing the years in the date/time variable mydtvar, use:

DT_TO_VAR, mydtvar, year=myyear

The result is a new variable called myyear that contains integer values.

Assume that you have created a date/time variable named date1 that contains the following date/time data:

date1=[{!dt, $
    1992,3,13,10,34,15.000,87474.440,0}, $
{!dt, 1983,4,20,12,30,19.000,84224.521,0}, $
{!dt, 1964,4,24,16,25,14.000,77350.684,0}]

To extract each date/time element into a separate variable:

DT_TO_VAR, date1, Year=years,  $
    Month=months, Day=days

; This procedure creates several variables containing the date
; time data.

PRINT, "Years = ", years

Years = 1992 1983 1964

PRINT, "Months = ", months

Months = 3 4 6

PRINT, "Days = ", days

Days = 13 20 24

DT_TO_SEC, DT_TO_STR, VAR_TO_DT

For more information on date/time, see the PV-WAVE User's Guide.