trendarith: Add or subtract a trend

In rcdo: Wrapper of 'CDO' Operators

Add or subtract a trend

Description

This module is for adding or subtracting a trend computed by the operator trend.

Usage

cdo_addtrend(ifile1, ifile2, ifile3, equal = NULL, ofile = NULL)

cdo_subtrend(ifile1, ifile2, ifile3, equal = NULL, ofile = NULL)

Arguments

ifile1, ifile2, ifile3	Strings with the path to the input files.
equal	BOOL - Set to false for unequal distributed timesteps (default: true)
ofile	String with the path to the output file.

Details

addtrend  Add trend
          It is
          
          o(t,x) = i_1(t,x) + (i_2(1,x) + i_3(1,x)*t)
          where t is the timesteps.
subtrend  Subtract trend
          It is
          
          o(t,x) = i_1(t,x) - (i_2(1,x) + i_3(1,x)*t)
          where t is the timesteps.

Value

Operators that output one or more files return a character vector to the output files.

Operators that output an indefinite number of files return a string with the basename of the files.

Operatos that don't return filenames return a character vector with the string output.

rcdo documentation built on June 8, 2025, 12:36 p.m.