diffobj provides tools to compare the visual representation of R objects using the Myer's diff algorithm: ## Example:> mx1 <- matrix(1:9, 3) > mx2 <- mx1[-2,] > diffPrint(mx1, mx2, format="raw")< mx1 > mx2 @@ 1,4 @@ @@ 1,3 @@ . [,1] [,2] [,3] [,1] [,2] [,3] . [1,] 1 4 7 [1,] 1 4 7 < [2,] 2 5 8 ~ . [3,] 3 6 9 [2,] 3 6 9 This is similar to `tools::Rdiff`, but is easier to use directly with R objects, has colorized output if your terminal supports it, has semantic-aware handling of the text output of R objects, and does not require the GNU diff utility to be available on the system. See the vignette for more details <https://cran.r-project.org/web/packages/diffobj/vignettes/diffobj.html>, and the Github page to submit issues <https://github.com/brodieG/diffobj>. Many thanks to Uwe Ligges and Kurt Hornik for their patience with my first CRAN submission. Brodie Gaslam.