replacemetvar: Replace a weather variable

In Maeswrap: Wrapper Functions for MAESTRA/MAESPA

Description

Replaces one (or more) of the weather variables in the met.dat file.

Usage

replacemetdata(metdfr, oldmetfile = "met.dat", columns = NULL,
  newmetfile = "met.dat", khrs = NA, setdates = TRUE)

replacemetvar(replacevar, newvalues, oldmetfile = "met.dat",
  newmetfile = "metNEW.dat")

Arguments

metdfr	Dataframe with met data, to be pasted into a met.dat file.
oldmetfile	Default name of the met.dat file that will be modified.
columns	Optional character string : if the 'Columns' statement in the met.dat file is to be replaced.
newmetfile	Name of the new met.dat file.
khrs	Optional. Number of timesteps per day (by default, read from the met.dat file).
setdates	Logical. If TRUE, fixes the start and end date in the new met file.
replacevar	Character. Name(s) of the variable to be replaced.
newvalues	Vector of new values for the weather variable, has to be the same length as the number of records in the met.dat file.

Value

Returns nothing.

Author(s)

Remko Duursma

Examples

## Not run: 

#:::1.::: Replace precipitation with random number between 0 and 2.
# First find out how many records there are:
nrecords <- nrow(readmet("met.dat"))

# Make new rain
newrain <- runif(nrecords, 0, 2)

# And replace
replacemetvar("PPT",newrain,"met.dat", "newmet.dat")


#:::2.::: Replace multiple weather variables.
newtair <- runif(nrecords, 0, 35)

# Have to make a matrix of the variables to be replaced:
newmat <- matrix(cbind(newrain, newtair),ncol=2)

# And give a vector of variable names --in the same order as in the matrix!!--.
replacemetvar(c("PPT","TAIR"), newmat, "met.dat", "newmet.dat")



## End(Not run)

Maeswrap documentation built on May 2, 2019, 7:58 a.m.