Richard Latham

add arrow/parquet as alternative in Chapter 5

4

Saw a debate on using feather vs. arrow's parquet online, and it seems like it is a viable alternate in efficiency and worth benchmarking in Chapter 5: Efficient input/output. [https://ursalabs.org/blog/2019-10-columnar-perf/](https://ursalabs.org/blog/2019-10-columnar-perf/)

1.6.2. - microbenchmark's multcomp reference missing

14

The code snippet in 1.6.2 for microbenchmark shows `cld` as a column in the output. cld only shows up as a column if multcomp is already installed (see [microbenchmark doc](https://cran.r-project.org/web/packages/microbenchmark/microbenchmark.pdf))....

4.5.2: Referencing remotes?

1

4.5.2 highlights that devtools is recommended for writing R packages. Should there be a reference for remotes here too? I'm not sure of the distinction, but I've seen some newer...

Code including quotation marks within blockquotes

1

This is perhaps exceptionally minor, but I noted when copy pasting code that exists within a blockquote (vs. the code blocks), that single or double quotation marks are stylised and...

2.4.5 stringsAsFactors=FALSE verbiage outdated?

4

Currently, 2.4.5 references `options(stringsAsFactors=FALSE)` as a .Rprofile preset that can make code less portable. R 4.0.0 made stringsAsFactors=FALSE the default behavior, so recommend re-write or suggest different non-portable example in...

2.5.1 - Mac keyboard shortcuts for RStudio

2

I tried to replicate `Cmd+?` on both of my MBPs and I didn't get any feedback from RStudio. Snippet from section: ``` On Mac, it works differently. `Cmd+?` should activate...

2.6.2 - Rho interpreter

2

2.6.2 references Rho as an alternative interpreter, but the [GitHub](https://github.com/rho-devel/rho) suggests the project has suspended development indefinitely. Unclear if this requires any mention, or it is kept in case the...

Chapter 2 footnote references

1

There are two references within the footnotes of Chapter 2: Peng 2014 and Sekhon 2006. Neither references are included in the References section of Chapter 2, and the hyperlinks don't...

[02-set-up.Rmd](https://github.com/engineerchange/efficientR/blob/master/02-set-up.Rmd) references package **pathological**, which is no longer on CRAN. [CRAN link](https://cran.r-project.org/web/packages/pathological/index.html)

Minor issue with penguin image rendering

2

At [https://z3tt.github.io/OutlierConf2021/](https://z3tt.github.io/OutlierConf2021/), If you ctrl+f for this portion of the tutorial: ``` ## use HTML syntax to add images to text elements ``` The researchgate penguin image is not rendering...