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-rw-r--r--R/drcfit.R2
1 files changed, 1 insertions, 1 deletions
diff --git a/R/drcfit.R b/R/drcfit.R
index 64426b9..6ba071f 100644
--- a/R/drcfit.R
+++ b/R/drcfit.R
@@ -29,7 +29,7 @@ drcfit <- function(data, chooseone=TRUE,
splitted <- split(data,data$substance)
# The indexing of the results of the ED50 function changed with drc 3.0.1
- if (packageVersion("drc") > 3) {
+ if (packageVersion("drc") > "3") {
ED50_row_index = "e:1:50"
EDx_row_index_prefix = "e:1"
} else {

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