Re: absolute value symbol?

From: Rick Grubin (grubin AT XXXXXX)
Date: Mon Sep 20 2004 - 14:26:47 MDT

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Hi Cathy

> I need to do some calculations using the absolute value of a number,
> however I do not know how to take the absolute value of a number using
> NCL. Does anybody know?

For integer input, use the NCL function abs():
Synopsis
function abs(value:integer)

Arguments
value: One or more integer values of any dimension.

  Description
    This function returns the absolute value of each element of the value
    parameter. The return array is dimensioned the same as the value
    parameter. Missing values are ignored.

and for input values that aren't integers, use fabs():
Synopsis
function fabs(value:numeric)

Arguments
value: One or more values of any dimension.

  Description
    This function returns the absolute value of each element of the value
    parameter. The return array is dimensioned the same as the value
    parameter. Missing values are ignored. The return value is of type
    double if input type is double, and float otherwise.

-Rick.

-- Rick Grubin Visualization + Enabling Technologies Scientific Computing Division National Center for Atmospheric Research grubin AT ucar.edu 303.497.1832

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