If this post interests you I strongly advise you to buy Advanced R and R Packages, and to join a workshop. I’ve learned everything in this post from Hadley Wickham’s books and Master R Developer Workshop.The name of the example is the same as the text before (*). In this document (*) means that there is a full example of usage in R in the Appendix 1: Examples.# returns TRUE if both are NULL, and FALSE if only one of the objects is NULL # Small helper function to generalize comparison to comparison of NULL #' Intuitive output: TRUE if both are equal or NULL resp., FALSE if both are unequal or only one is NULL

#' Compares two basic objects which in addition to usual compare can be NULL #' Works as an extension to usual compare Question: What am I doing wrong? Sorry for such a basic question, but I am at a loss and most step-by-step tutorials I've seen so far stop before explaining dependencies.Ī R-File: #' Extension of compare to include NULLs DESCRIPTION and NAMESPACE files of other R packages from CRAN don't look different to mine (for my eyes)? I read 'Writing R Extensions' - 1.1.3 Package Dependencies and Hadley's Wiki concerning how to write packages, but couldn't solve my problem. If I do check(document=F), it gives an cryptic error about a digest package which is not loaded. Packages' of the 'Writing R Extensions' manual.įurthermore, check() deletes the import(ggplot2) line in the NAMESPACE. See the information on DESCRIPTION files in the chapter 'Creating R Not imported from: 'ggplot2' All declared Imports should be used. with devtools::check() ):Ĭhecking dependencies in R code. With dependencies, I get problems when I CHECK (e.g. Due to recommendations in several posts, I'm using R Studio, devtools and Roxygen2 (being on Windows). I managed quite fast to build a package with no dependencies, everything works fine.

I was trying now for several hours to build a package in R and getting a bit desperate about how slowly I progress.

R package build