replacePAR: Replace a parameter value

Description

Replaces a parameter value in a MAESTRA/MAESPA input file. Also works for a vector of input values.

Usage

replacePAR(datfile, parname, namelist = NA, newval, noquotes=FALSE)

Arguments

datfile

Name of the input file.

parname

Name of the parameter to replace the value of.

namelist

Optional. In which namelist to look for the parameter.

newval

New value of the parameter. Can be a single value or a vector, or a matrix (see Details).

noquotes

Logical. If FALSE, does print quotes around character values.

Value

Nothing is returned. The inputfile is modified.

Details

If the new parameter value(s) is a vector (or a single value), the values will be placed on a single line in the parameter file. If instead a matrix is provided, each row of the matrix is placed on a separate line. WARNING : The input file is modified. Make sure to backup your original input files!

Examples

Run this code

# Replace a parameter with a single value:
replacePAR("trees.dat", "notrees", "plot", newval=100)

# Replace a number of values:
replacePAR("trees.dat", "xycoords", "xy", newval=c(1,1,2,2,3,3))

# Replace a number of values in a different way : this may be useful in 
# more complicated programs,
# rr when reading a string from a file (that should be interpreted as a vector).
replacePAR("trees.dat", "xycoords", "xy", newval="1 1 2 2 3 3", noquotes=TRUE)

# Replace a parameter so that the new values are placed on multiple rows.
# Useful for tree namelists with multiple dates and multiple trees 
# (where each row corresponds to a tree, and each column to a date.)
m <- matrix(c(1,2,3,4,5,6,7,8,9), nrow=3, byrow=TRUE)
replacePAR("trees.dat", "indivlarea", "values", newval=m)