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.
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.
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.