
Section 8. Working with Data Files on the PC
Semicolons are used in Time Series functions to separate the elements or
expressions from the count which determines the interval. SmplMax and
SmplMin require two elements separated by a semicolon. The first is checked
for a maximum or minimum, while the second is sampled on the maximum or
minimum.
The following set of weather data from Mt. Logan in northern Utah gives a
total of seven elements each hour. This Field Formatted output, with title and
column headers, was generated by Split. These data are used in the following
examples of Time Series functions.
Airtemp
Mean Wind
Wind
Std Dev of
Avg(x;n) returns the average of element x over a full data set or every
n
th
value.
Examples:
Avg(3) = 59.898 (average daily temp)
Avg(3;4) = 57.36 (average 4 hour temp)
56.493 (average 4 hour temp)
60.708 (average 4 hour temp)
61.998 (average 4 hour temp)
66.148 (average 4 hour temp)
56.683 (average 4 hour temp)
Blanks(x;n) returns the number of blanks or bad data in element x over a
full data set or every nth value. Refer to TABLE 8-9 for
definition of blank or bad data. Example:
Blanks(3) = 0 (no holes in data set).
8-60
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