The hardware and bandwidth for this mirror is donated by dogado GmbH, the Webhosting and Full Service-Cloud Provider. Check out our Wordpress Tutorial.
If you wish to report a bug, or if you are interested in having us mirror your free-software or open-source project, please feel free to contact us at mirror[@]dogado.de.

gdxdt

Read/Write utilities for GAMS gdx files. Using R’s data.table.

Requires GAMS gdxrrw library downloadable from the GAMS wiki.

Install

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.

Usage

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")

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
Health stats visible at Monitor.