Read/Write utilities for GAMS gdx files. Using R's data.table.
Requires GAMS gdxrrw library downloadable from the GAMS wiki.
require(devtools)
install_github("loisel/gdxdt")
gdxdt depends on the gdxrrw library. To use this library you have
to set the gams library path via igdx.
Read parameter, variable or set with symbol name:
dt <- readgdx("filename.gdx", "name")
Read upper bound field of variable, field="l" is the default:
dt <- readgdx("filename.gdx", "variable", field="up")
Write parameter:
dt <- data.table(
col1=c("a", "b", "c"),
col2=c("d", "e", "f"))
dt[, value:=runif(1), by="col1"]
writegdx.parameter("test.gdx", dt,
name="test",
valcol = "value",
uelcols = c("col1", "col2"))
Write variable:
dt <- data.table(
col1=c("a", "b", "c"),
col2=c("d", "e", "f"))
dt[, value:=runif(1), by="col1"]
writegdx.variable("test.gdx", dt,
name="test",
valcol = "value",
uelcols = c("col1", "col2"),
field="l")