R Snippet

This Node Is Deprecated — This node is kept for backwards-compatibility, but the usage in new workflows is no longer recommended. The documentation below might contain more information.

Allows execution of R commands in a local R installation. The result of these R commands is returned in the output table of this node. All input data is written to a CSV file, imported into R (saved in the variable named R) and processed together with the R commands. The result which has to be saved into variable R as well is written to a CSV file again and then imported into KNIME.

More details about R:
http://www.r-project.org/
Short-refcard.pdf

Options

R Command

R Snippet
The R commands to run.
Column List
The list contains the column that are available in the input table. Double click any of the column names to insert the respective field in the expression editor. It will replace your current selection or simply insert at the current caret position.
Flow Variable List
The list contains the flow variables that are currently available at the node input. Double clicking any of the entries will insert the respective identifier at the current cursor position (replacing the selection, if any).

R Binary

R binary path
Path to the local R executable. Note that it is possible to specify the path to the local R executable also in the R section of the KNIME preferences.
Arguments for R binary
Add additional arguments run together with the R binary. The '--vanilla' mode ensures a clean workspace and may cause problems when removed.
Override default
If checked, the specified file is used as R binary. If not checked, the file specified in the KNIME's R preferences is used.

Input Ports

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Data Input

Output Ports

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R Result Data

Views

R Std Output
The text sent to standard out during the execution of R executable as well as the text of the .Rout file generated by R.
R Error Output
The text sent to standard error during the execution of R executable as well as the text of the .Rout file generated by R. (If it appears in gray, it's the output of a previously failing run which is preserved for your trouble shooting.)

Workflows

Further Links

Developers

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