Multiple Input to R Node (Revisited)

KNIME Extensions Scripting
#1

Hi All,

I am trying to merge in a second data set into an R calculation. It looks like there is a new node type:  (R+Table to R) that would do the trick. The first data set has length J, and the second data set has length G and I don't want to mash these together.

What is the variable name (e.g. RMODEL, RDATA, RIN??) that the "R" part (a square connector in upper left) so that I can access it in R? I can see the data file that contains it is mentioned in the log file.

I know the triangle comes in as `R', but it seems to overwrite the R input because the load statement loads the original RMODEL/RDATA/RIN as the `R' variable too.

 

Thanks,

Eric

P.S. I know others have posted a similar question, but I wish to ask again because its two years later and there seems to be this new node that could do it.

 

 

#2

Hi Eric, that exactly the way how to use it. The new nodes allow merging additional KNIME tables onto an R workspace. The name of the variable inside R is define inside the R script. RDATA and RMODEL are only pre-defined place holders used in the R Learner and R Predictor. I have attached an example where I have a dataset A, converted into into R and merge a second one B onto the same R workspace. Hope this help.

#3

Hi Gabriel,

Thanks for your reply.  Ah, it looks like the environment is inherited by nodes subsequently connected by the square connectors.

Hot dog!

Thanks again,

Eric