load_dietmatrix: Extract the dietmatrix from the biological parameterfile
In atlantistools: Process and Visualise Output from Atlantis Models

Description Usage Arguments Value Examples

Extracts the diet matrix as long dataframe from the biological paremeter file of any ATLANTIS simulation.

load_dietmatrix(prm_biol, fgs, transform = TRUE, convert_names = FALSE,
  version_flag = 2)

write_diet(dietmatrix, prm_biol, save_to_disc = TRUE)

`prm_biol`	Character string giving the connection to the biological parameterfile. The filename usually contains `biol_fishing` and does end in `.prm`.
`fgs`	Character string giving the connection to the functional groups file. The filename usually contains `Groups` and does end in `.csv`.
`transform`	Boolean indicating if the returned dataframe is displayed in "long" (`transform = TRUE, default`) or "wide" (`transform = FALSE`) format. You should use the "wide" format in case you aim to change your diet matrix entries.
`convert_names`	Logical indicating if group codes are transformed to LongNames (`TRUE`) or not (default = `FALSE`).
`version_flag`	The version of ATLANTIS model. 1 for bec_dev, 2 for trunk. `default is 2.`.
`dietmatrix`	Dataframe of the ATLANTIS dietmatrix generated with `load_dietmatrix` using `transform = FALSE`.
`save_to_disc`	Logical indicating if the resulting prm file should be overwritten (`TRUE`) or not (`FALSE`). Defaults to `TRUE`.

dataframe of the availability matrix in long format with columns pred, pred_stanza (1 = juvenile, 2 = adult), prey_stanza, prey, avail, code.

# Can be applied to trunk models.
d <- system.file("extdata", "setas-model-new-trunk", package = "atlantistools")
prm_biol <- file.path(d, "VMPA_setas_biol_fishing_Trunk.prm")
fgs <- file.path(d, "SETasGroupsDem_NoCep.csv")

dm <- load_dietmatrix(prm_biol, fgs)
head(dm, n = 10)

# Use write_diet to update your existing parameterfile.
dietmatrix <- load_dietmatrix(prm_biol, fgs, transform = FALSE)

# Write is set to FALSE here for technical reasons. Make sure to set it to TRUE in case you
# want to update your file.
new_diet <- write_diet(dietmatrix, prm_biol, save_to_disc = FALSE)

# And to bec-dev models.
d <- system.file("extdata", "setas-model-new-becdev", package = "atlantistools")
prm_biol <- file.path(d, "VMPA_setas_biol_fishing_New.prm")
fgs <- file.path(d, "SETasGroups.csv")

dm <- load_dietmatrix(prm_biol, fgs, version_flag = 1)
head(dm, n = 10)