I set up the following libraries:
# Libraries library(dplyr) library(ggplot2) library(tidyr)
I used the filter() function to remove rows that contain a missing value in my data:
Lab_Fibre_Filtered <- Lab_Fibre_Data %>;% filter(InitialSampleCanWeight_1 >0 & InitialSampleCanWeight_2 >0 & FinalSampleCanWeight_1 >0 & FinalSampleCanWeight_1 >0 & SampleWeight_1 >0 & SampleWeight_2 >0)
I then checked for an absolute difference between the two estimates equal to or greater than 0.25 units:
Lab_Fibre_Filtered <- Lab_Fibre_Filtered %>;% filter(!(abs(Fibre1 - Fibre2) >= 0.25))
and now I have to use UPDATE to include the difference limit as an additional filtering criteria. However, when I try to run the following I receive an error:
Update(Lab_Fibre_Filtered, abs(Fibre1 - Fibre2)) Error in Update(Lab_Fibre_Filtered, abs(Fibre1 - Fibre2)) : could not find function "Update"
What do I need to add to make this work?