R to Table

Converts a data frame from an R workspace into a KNIME data table. The result data is returned at the data out-port. Please, use the variable name knime.out for the data frame.

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

Options

R Snippet

R Script

The R commands to run. The data frame that should appear at the output is expected to be stored in knime.out.

The node also allows to access and modify flow variables. You can access all flow variables at knime.flow.in and please add all new or modified flow variables to the list at knime.flow.out.

Examples

Take the input "data" and send it to the output:

knime.out <- data.frame(data)

Read the data from the file defined by the flow variable fname:

data <- read.table(knime.flow.in[["fname"]])

Compute students t-test and store the p-value in the flow variable p.value:

h <- t.test(knime.in["d"])
knime.flow.out <- list(p.value = h[["p.value"]])

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).

Templates

Category - Title

A categorized list of R script templates. The apply button at the left will replace the R script and guide you to the R Snippet tab.

Please use "Create Template..." button on the R Snippet tab to add the current R script to the list of templates.

Advanced

NaNs

Convert NaN and +/-Infinity output to missing cells. Enable this for backwards compatibility with the behavior before version 2.10.

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.

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

• 05_Predict_DepartureDelays_with_MicrosoftRKNIME Hub
• 20220322_R_IRR_applyKNIME Forum
• 30123KNIME Forum
• CalibraCurve-v.2.0.knwf 1KNIME Hub
• Drinks_LOESSKNIME Forum
• Show all 51 workflows

Links

• R to Table and as.Date functionby JanDuo on 2020-06-12

  forum.knime.com/p/94121
• store a local file directory into a variableby izaychik63 on 2019-09-03

  forum.knime.com/p/69249
• reader and writer Rby JanDuo on 2020-07-28

  forum.knime.com/p/98251

Developers