# Check your article before submission

#### H. Sherry Zhang and Di Cook

The `rjtools` package has implemented some automated checks to assess if it appropriately follows the R Journal format. It is important that authors read information at journal website.

This vignette will demonstrate these checks with an example article, paper-with-errors, where the argument `path = path_to_article` in the checks points to the directory of the .tex file. If you have created the article using `create_article()` with the default arguments, you can check with `path = here::here("rjarticle")`.

# All checks in one function

All the nine checks in `rjtools` can be completed with `initial_check_article()`, given a path to the article folder:

    initial_check_article(path = path_to_article)

The check result will be saved in an initial_check.log file under the same folder, as well as displayed in the console. This is how it looks like for the sample article:

    Initial check results:
    ERROR: Submission does not have consistently named tex, bib, and R files
    SUCCESS: No problematic file found
    SUCCESS: Possible motivation letter found
    ERROR: The title is not in title case! Suggest title to be changed to:
    ToOoOlTiPs: An R Package for Customizable Tooltips in Interactive Graphics
    SUCCESS: All sections are properly formatted in sentence case
    SUCCESS: Abstract comes before the introduction section
    NOTE: A potential list of spelling to check: tooltips, tooltip, alison, ggplot

# Individual check functions

The nine individual checks contained in `initial_check_article()` are:

- `check_filenames()`

- `check_unnecessary_files()`

- `check_cover_letter()`

- `check_title()`

- `check_section()`

- `check_spelling()`

- `check_proposed_pkg()`

- `check_packages_available()`

and they can all be individually checked on the article.

## Filenames

    check_filenames(path = path_to_article)

The .bib file is named `Rjreferences.bib` when created and we recommend setting a consistent name across the .bib, .tex, and .Rmd file. A fix to this is to rename the `Rjreferences.bib` as the file name you used when create the article, in our case, `paper-with-errors`.

## Presence of unnecessary files

    check_unnecessary_files(path = path_to_article)

This function checks that the folder doesn’t contain the `RJtemplate.tex` file, which is included the past R journal template. The authors instruction requires the authors to replace the content of this `RJtemplate.tex` file with article content and name with the lowercase concatenated author name, so it is essentially the `.tex` file automatically generated in the previous section. Our article don’t have unnecessary files.

## Presence of a motivating letter

    check_cover_letter(path = path_to_article)

Cover letter should be provided for all articles and saved at the same folder as the article. The function checks whether there possible motivation letters are in the main directory, and recommends to put them in the `motivation-letter` folder if so. Our article passes this check.

## Article title is in title case

    check_title(path = path_to_article)

The article title needs to be in the title case and the check is not happy with our title here. Use `tools::toTitleCase()` to get the correct title case format:

    tools::toTitleCase("ToOoOlTiPs: An R package for Customizable Tooltips in Interactive Graphics")
    #> [1] "ToOoOlTiPs: An R Package for Customizable Tooltips in Interactive Graphics"

Here we forget to capitalise “P” in the word “package” - better make this change before submission! Also if the title contains the package you’re proposing, i.e `ToOoOlTiPs` in our article, use the `\pkg{.}` tag rather than `\CRANpkg{.}`.

## Section title is in sentence case

    check_section(path = path_to_article)

Section titles need to be in the sentence case and we are all good here :)

## Spelling

    check_spelling(path = path_to_article)

The spelling is checked from the abstract to bibliography section and only words with all lowercase letters are checked to avoid picking up on acronyms and names. The underlying checking is done through the `hunspell` package with US spelling by default. British spelling can be checked with argument `dic = "en_GB"`. The R journal welcomes both the U.S and British spelling, along with other national variation, as long as consistency is maintained.

Notice that the spelling check may pick up some domain specific vocabularies and authors may want to further confirm if these are true spelling mistakes. In our article, “tooltip” is a specialised vocabulary in interactive graphics, rather than a misspell, so we are free to go :)

## Package is available on CRAN

    check_proposed_pkg()

The package proposed in an article should already be available on CRAN before article submission. `check_proposed_pkg()` prompts the following in the console:

> What’s the name of package being proposed in the article? If none, please enter 0.

and authors need to enter the exact package name, with proper capitalisation, for an availability check on CRAN download. For our article, enter `ToOoOlTiPs` in the console and the check would say

> NOTE: No CRAN activities detected for package ToOoOlTiPs

Not surprising that CRAN can’t find our package since it is a hypothetical one!

## Package availability

    check_packages_available(path = path_to_article)

All the packages mentioned with a `\CRANpkg{.}` or `\BIOpkg{.}` tag need to be available on CRAN or Bioconductor and `check_packages_available()` makes sure this is the case. For our article, we get

> ! ERROR: 1 of 5 package(s) not available on CRAN: ToOoOlTiPs

which is not really an issue here!

# Checklist

Editors, associate editors and reviewers will routinely check that papers adhere to these criteria:

## General

- Filenames are sensible such as author-names.XXX
- Add-on package, and dependent packages, are on CRAN
- Code runs easily and quickly
- Examples can be reproduced with the R code provided
- Code is appropriately indented
- Contact email address is provided for at least one author

## Titles

- Title need to be in title case
- Section titles should be in sentence case
- No special formatting can be used in the title

## Abstract

- Should not have math notation

## Mathematics

- Brackets need to be appropriately paired
- Punctuation after equations needs to be consistent
- Mathematical operators (e.g., log) should be roman, not italic

## Code

- Chunks of code in the text of the paper are concise and not overly long, is readable and nicely formatted.
- Code provided with the paper reproduces the results reported in the paper.

Advice on good coding style can be found in the `rjtools` article “More details on the R Journal format”.

## Figures and tables

- Figures are readable and clear. Good advice on figure can be found in
  - Healy (2018) Data Visualization: A practical introduction, available at https://socviz.co
  - Wilke (2019) Fundamentals of Data Visualization, available at https://clauswilke.com/dataviz/
- Tables are constructed effectively, with right-justified numbers, and don’t exceed text margins. See Schwabish (2020) Ten Guidelines for Better Tables for advice on tables.
- Captions have three parts: (1) what is the plot/table about, (2) specific details of plot/table, like what type of display and how variables are mapped, (3) the most important thing that the reader should learn.

## Citations

- All R packages used in the work are appropriately cited. For example, if you use `ggplot2` to make your plots, the citation for this package needs to be added to your paper. See more details below if you need help on how ot do this.
- All references need to have a DOI where available, best added using the URL item.
- The default bibliography style needs to be used.
- Use consistent capitalization for titles in the citations, which may require manual editing if extracting citation information from different services.

How to get the package citations

The preferred citation is provided by:

    > citation("ggplot2")

    To cite ggplot2 in publications, please use

      H. Wickham. ggplot2: Elegant Graphics for Data Analysis.
      Springer-Verlag New York, 2016.

    A BibTeX entry for LaTeX users is

      @Book{,
        author = {Hadley Wickham},
        title = {ggplot2: Elegant Graphics for Data Analysis},
        publisher = {Springer-Verlag New York},
        year = {2016},
        isbn = {978-3-319-24277-4},
        url = {https://ggplot2.tidyverse.org},
      }

To check if you’ve appropriately cited all the packages used in your code, the `grateful` package can help.

In the project where you are writing your paper, use

    cite_packages(out.dir = ".")

to get a `.bib` file for all packages referenced. The entries can be added to the rest of your paper’s bib file.

The `scan_packages` function can give you a list of the packages you are using.