last problem with example

man/interp.Rd

@@ -177,7 +177,7 @@ air <- airquality[(!is.na(airquality$Temp) &
                    !is.na(airquality$Ozone) & 
                    !is.na(airquality$Solar.R)),]
 # gives an error:
-air.ip <- interp(air$Temp,air$Solar.R,air$Ozone)
+\dontrun{air.ip <- interp(air$Temp,air$Solar.R,air$Ozone)}
 # use mean of duplicate points:
 air.ip <- interp(air$Temp,air$Solar.R,air$Ozone,duplicate="mean")
 }