Function Documentation

average

Calculates the average

vargridminfrackeepgridsavgvar/numaverage

Arguments Argumentos Arguments
label término label	type tipo type	Description Descripción Description
var	variable	variable to be averaged
grid	grid set	grid(s) over which the average is to be calculated
minfrac	number	Minimum fraction of data that must be present (i.e., fraction not indicated as missing) within the selected domain in order for the average to be calculated. If minfrac is not present, then a missing value is returned. If minfrac is not given, then the average is calculated regardless of the amount of data present in domain.
keepgrids	name	keeps independent variables averaged over in output as single values grids
avgvar/num	variable or constant	var averaged over grid. avgvar is no longer dependent on grid, but is still dependent on any other grids that var depended on (if any)

Description

average calculates a simple average, over the grid(s) included in the brackets, of the values in the latest variable on the stack. The optional minfrac argument is a number between 0. and 1.0 that indicates what fraction of data must be non-missing over the averaging grid in order for a non-missing result to be produced. If minfrac is not specified, its default value is 0., and an average is produced using all available data over the averaging grid.

Example

SOURCES .NOAA .NCDC .ERSST .version2 .SST
X (170W) (120W) RANGE
Y (5S) (5N) RANGE
[X Y]average

This example averages over both longitude (X) and latitude (Y) to produce an average sea surface temperature value (for each time step) over the equatorial Pacific Ocean.

Live Example Link

SOURCES .NOAA .NCDC .GHCN .v2beta .prcp
IWMO 60354001 VALUE
T (Jan 1960) (Dec 1979) RANGE
[T]0.5 average

This example produces the average monthly precipitation value for Algiers, Algeria, over the period January 1960 to December 1979, if at least half the monthly precipitation values over that time period are not missing.

Live Example Link

average

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