R View (Workspace)

Allows execution of an R script from within KNIME. The view resulting from this script is returned in the output image port of this node.

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

Options

R Snippet

R Script: The code being executed in R. Input data should be previously made available in the R workspace and while the desired output image must be generated as an R view (eg. don't use the R function "png()" as this will likely result in a empty view).
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 variable at the current cursor position.
Column List: The list contains the column references that are currently available at the node input. Double clicking any of the entries will insert the respective identifier at the current cursor position.

PNG Settings

Width: Resulting image width. Increase for improved resolution.
Height: Resulting image height. Increase for improved resolution.
Resultion: Resulting pixels per inch. Default value is 72, but may be increased for smaller but more detailed images.
Text Point Size: Default font size.
Background color: A default background color for the image.

Templates

Category: A template category defined by the author.
Title: Names of the available templates.
Description: A brief overview of the purpose of the template.
Preview: The code to be applied to your expression editor.

Advanced

Overwrite default path to R home: Check this option to select a path to the home of a R installation that is different from the path configured on the R preference page. The path must point to the root folder of the R installation tree. You can either specify the path directly or use the R installation in a conda environment. The conda environment can be specified using a conda environment flow variable from e.g. a “Conda Environment Propagation” node.

Input Ports

: R Input

Output Ports

: View Image

Views

R View: View displays the png generated by the R command entered within the dialog.
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

Developers

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Installation

To use this node in KNIME, install the extension KNIME Interactive R Statistics Integration from the below update site following our NodePit Product and Node Installation Guide:

v5.4

A zipped version of the software site can be downloaded here.

Plugin provider: KNIME AG, Zurich, Switzerland

Plugin version: 5.4.0.v202407231410

On NodePit since: 2024-12-06

Last update: 2024-12-17

KNIME versions: Since v3.6

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