1 files changed, 1 insertions, 0 deletions
diff --git a/R/drplot.R b/R/drplot.R
index 55b9da4..149337c 100644
--- a/R/drplot.R
+++ b/R/drplot.R
@@ -1,3 +1,4 @@
+if(getRversion() >= '2.15.1') utils::globalVariables(c("dose", "Substance"))
 drplot <- function(drresults, data, 
         dtype = "std", alpha = 0.95, ctype = "none",
         path = "./", fileprefix = "drplot", overlay = FALSE,