add_column_apsim_met: Add a column to an object of class 'met'

In apsimx: Inspect, Read, Edit and Run 'APSIM' "Next Generation" and 'APSIM' Classic

Add a column to an object of class ‘met’

Description

The usual way of adding a column to a data frame might not work for an object of class ‘met’, so this method is recommended

Usage

add_column_apsim_met(met, value, name, units)

## S3 replacement method for class 'met'
x$name <- value

remove_column_apsim_met(met, name)

Arguments

met	object of class ‘met’
value	value for the data.frame. It could be an integer, double or vector of length equal to the number of rows in x.
name	name of the variable to be removed
units	units for the new column (required)
x	object of class ‘met’

Value

an object of class ‘met’ with the additional column

an object of class ‘met’ without the variable (column) in ‘name’

Examples

extd.dir <- system.file("extdata", package = "apsimx")
ames <- read_apsim_met("Ames.met", src.dir = extd.dir)

## The recommended method is
val <- abs(rnorm(nrow(ames), 10))
ames <- add_column_apsim_met(ames, value = val, name = "vp", units = "(hPa)")

## This is also possible
vp <- data.frame(vp = abs(rnorm(nrow(ames), 10)))
attr(vp, "units") <- "(hPa)"
ames$vp <- vp$vp

## This is needed to ensure that units and related attributes are also removed
ames <- remove_column_apsim_met(ames, "vp")
## However, ames$vp <- NULL will also work

apsimx documentation built on Sept. 11, 2024, 5:42 p.m.