apsimx (version 2.2)

edit_apsimx: Edit an APSIM-X (JSON) Simulation

Description

This function allows editing of an APSIM-X (JSON) simulation file.

Usage

edit_apsimx(
  file,
  src.dir = ".",
  wrt.dir = NULL,
  node = c("Clock", "Weather", "Soil", "SurfaceOrganicMatter", "MicroClimate", "Crop",
    "Manager", "Report", "Other"),
  soil.child = c("Metadata", "Water", "SoilWater", "Organic", "Physical", "Analysis",
    "Chemical", "InitialWater", "Sample"),
  manager.child = NULL,
  parm = NULL,
  value = NULL,
  overwrite = FALSE,
  edit.tag = "-edited",
  parm.path = NULL,
  root,
  verbose = TRUE
)

Arguments

file

file ending in .apsimx to be edited (JSON)

src.dir

directory containing the .apsimx file to be edited; defaults to the current working directory

wrt.dir

should be used if the destination directory is different from the src.dir

node

either ‘Clock’, ‘Weather’, ‘Soil’, ‘SurfaceOrganicMatter’, ‘MicroClimate’, ‘Crop’, ‘Manager’, ‘Report’ or ‘Other’

soil.child

specific soil component to be edited

manager.child

specific manager component to be edited

parm

parameter to be edited

value

new values for the parameter to be edited

overwrite

logical; if TRUE the old file is overwritten, a new file is written otherwise

edit.tag

if the file is edited a different tag from the default ‘-edited’ can be used.

parm.path

path to the attribute to edit when node is ‘Other’

root

supply the node postion in the case of multiple simulations such as factorials.

verbose

whether to print information about successful edit

Value

(when verbose=TRUE) complete file path to edited .apsimx file is returned as a character string. As a side effect this function creates a new (JSON) .apsimx file.

Details

The variables specified by parm within the .apsimx file specified by file in the source directory src.dir are edited. The old values are replaced with value, which is a list that has the same number of elements as the length of the vector parm. The current .apsimx file will be overwritten if overwrite is set to TRUE; otherwise the file ‘file’ -edited.apsimx will be created. If (verbose = TRUE) then the name of the written file is returned.

When node equals Report, the editing allows to add variables, but not to remove them at the moment.

Examples

# NOT RUN {
## This example will read one of the examples distributed with APSIM-X
## but write to a temporary directory
tmp.dir <- tempdir()

## Edit Bulk density
extd.dir <- system.file("extdata", package = "apsimx")
bds <- c(1.02, 1.03, 1.09, 1.16, 1.18, 1.19, 1.20)
edit_apsimx("Wheat.apsimx", src.dir = extd.dir,
            wrt.dir = tmp.dir,
            node = "Soil",
            soil.child = "Water", 
            parm = "BD", value = bds,
            verbose = FALSE)
## Inspect file
inspect_apsimx("Wheat-edited.apsimx", src.dir = tmp.dir,
                node = "Soil", soil.child = "Water")
## To delete the file...
file.remove(file.path(tmp.dir, "Wheat-edited.apsimx"))

## Edit the fertilizer amount in 'Maize.apsimx'
edit_apsimx("Maize.apsimx", src.dir = extd.dir,
             wrt.dir = tmp.dir, node = "Manager",
             manager.child = "SowingFertiliser",
             parm = "Amount", value = 200, verbose = TRUE)
             
## Make sure it worked
inspect_apsimx("Maize-edited.apsimx", src.dir = tmp.dir, node = "Manager")

## Remove the file
file.remove(file.path(tmp.dir, "Maize-edited.apsimx"))
# }
# NOT RUN {
# }