Thank you so much! I had trouble finding good documentation on how to create flow variables in R. Is there a way to pass multiple values in a vector as a flow variable? This can be done very easily in python nodes, but for some reason in R it will only pass along the first value in the vector I create.
To my knowledge currently it is not possible to pass a vector back through a flow variable. This said, depdening on the data type, you could render multiple values to a string and then parse it downstream from the R snippet node. Just an idea though.
I ended up using the Add Table to R node. This allowed me to create a dataframe in python containing all of the metadata associated with the excel files, pass this dataframe into the R node, and then pass the colum values as a vector in the subsequent R node.