Add a check to make sure certain radial_phylo args != NULL   - If you let them be NULL your function will fail down the line     in some weird way with an unpredictable error message. This     is mainly because if(arg == X) conditionals in R fail if     arg is NULL...but they don't evaluate to FALSE, they error.
Add a check to make sure certain radial_phylo args != NULL
  - If you let them be NULL your function will fail down the line
    in some weird way with an unpredictable error message. This
    is mainly because if(arg == X) conditionals in R fail if
    arg is NULL...but they don't evaluate to FALSE, they error.

nsh87/receptormarker,catterbu/receptormarker,daniel0128/receptormarker,catterbu/receptormarker,daniel0128/receptormarker,catterbu/receptormarker,catterbu/receptormarker,nsh87/receptormarker,catterbu/receptormarker,daniel0128/receptormarker,daniel0128/receptormarker,daniel0128/receptormarker,nsh87/receptormarker,nsh87/receptormarker,nsh87/receptormarker,daniel0128/receptormarker,daniel0128/receptormarker