Avoid NOTES in R CMD check

- Export S3 methods
- Avoid using undeclared variable names

3 files changed, 6 insertions, 1 deletions

diff --git a/NAMESPACE b/NAMESPACE
index dfa9e9bb..4774475e 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -1,5 +1,8 @@
 # Export all names
 exportPattern(".")
+S3method(plot, mkinfit)
+S3method(summary, mkinfit)
+S3method(print, summary.mkinfit)
 
 # Import all packages listed as Imports or Depends
 import(
diff --git a/NEWS.md b/NEWS.md
index c8284175..1caaa148 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -4,6 +4,8 @@
 
 - `mkinparplot()`: Avoid warnings that occurred when not all confidence intervals were available in the summary of the fit
 - `print.summary.mkinfit()`: Fix printing the summary for the case that the number of iterations is not available
+- NAMESPACE: export S3 methods plot.mkinfit, summary.mkinfit and print.summary.mkinfit to satisfy R CMD check on R-devel
+- `mkinparplot()`: Avoid warning in R CMD check about undeclared global variable `Lower`
 
 ## NEW FEATURES
 
diff --git a/R/mkinparplot.R b/R/mkinparplot.R
index 53354db7..a5e8fb89 100644
--- a/R/mkinparplot.R
+++ b/R/mkinparplot.R
@@ -39,7 +39,7 @@ mkinparplot <- function(object) {
   for (type in names(n.plot)) {
     parnames <- get(type)
     values <- bpar[parnames]
-    values_with_confints <- data.frame(t(subset(data.frame(t(values)), !is.na(Lower))))
+    values_with_confints <- data.frame(t(subset(data.frame(t(values)), !is.na("Lower"))))
     xlim = switch(type,
                   state.optim = range(c(0, unlist(values)), 
                                       na.rm = TRUE, finite = TRUE),