NA factor levels expected?

[mwvoss]

For many participants the following warning message is given:

[1] 121001
[1] "The file exists"
[1] " No Missing Parcels"
Warning in `[<-.factor`(`*tmp*`, iseq, value = 121001L) :
  invalid factor level, NA generated

Can the user be given a warning of whether this is expected or a warning to pay attention to?

[mwvoss]

Likely related to this, for me the variable X.Subject_ID. has blank NAs when the loop has finished, should it?

[mpipoly]

@mwvoss which script did you run to get the error below:

NOTE: I just ran the script here and did not generate that warning: /Volumes/vosslabhpc/Projects/BETTER/3-Experiment/2-data/bids/derivatives/xcpEngine/analyses_longitudinal-rs/pre/1a_oneD_to_csv_iowa.Rmd

[1] 121001
[1] "The file exists"
[1] " No Missing Parcels"
Warning in `[<-.factor`(`*tmp*`, iseq, value = 121001L) :
  invalid factor level, NA generated

[mwvoss]

With this script (1a_oneD_to_csv_iowa.Rmd) I received the warning message shown after each subject iterated through the loop.