Integrating R (ggplot2) into a KNIME workflow

[mlauber71]

For the general access to a database you could use the KNIME DA Nodes:
https://docs.knime.com/2019-06/db_extension_guide/index.html

Then I have a few more examples of graphics using R and Python you might find useful.

R - multiple graphics

Multiple plots / graphs from a single R script

You could determine a local path and then tell R to save various graphics in a row. I attached an example workflow that does that. You might use that as a starter. The R View shows one plot but saves more than one. I tried that with just a R scrip node but it gave me an error message. library(ggplot2) https://www.andrewheiss.com/blog/2016/12/08/save-base-graphics-as-pseudo-objects-in-r/ var_name_pdf_file <- paste0(knime.flow.in[[“var_path_graphic”]], “rplot.pdf”) var_name_png_file <- paste0…

R - Venn Gram - Export graphics to PNG

Venn / Euler diagrams

I toyed around with Stephan Kolassa’s “Data Scientis Venn Diagram” and R. And I could bring it to PNG, although I do not claim to have fully grasped to construct a VennGram from scratch. Maybe it can serve as an inspiration … The list of steps to compile Rserve on MacOS is in the blog entry. [image] kn_example_venn_gram.knwf (554.3 KB)

R - Heatmaps with Dendrograms

Create Heatmaps in KNIME and use R to add Dendrograms – mlauber71

Python - some graphics from the Iris data set

Examples of using Python to generate graphics (using the isris dataset) –...