notes-2019-03-20.md

Aggregate 2019-03-20

Total people: 9

Resources:

• https://pdxrlang.com/
• https://github.com/pdxrlang/aggregate
• http://pdxdata.org
• Notes end up at https://github.com/pdxrlang/aggregate/tree/master/notes

Announcements

• R/docker/postgres workshop - sent to mailing list - https://www.meetup.com/Portland-Data-Science-Group/events/258625975/
• csvconf - https://csvconf.com/

Interests/Problem mentioned in introductions:

• Biology field data collection
• Choropleth maps
• Environmental data

Topics:

• Comparing two distributions
  • See: https://github.com/jimtyhurst/codesamplerr/blob/master/vignettes/DistributionOfMeetupDays.md
• Choropleth maps in R
  • See https://github.com/buchmayne/spatial-analysis-workshop for samples of using 'sf' files, dplyr, and ggplot to create a choropleth map.
  • 'tidycensus' package: https://cran.r-project.org/package=tidycensus
• Making pkgs
  • R pkgs book http://r-pkgs.had.co.nz/
  • https://hilaryparker.com/2014/04/29/writing-an-r-package-from-scratch/ (classic reference for making a package)
  • https://www.hvitfeldt.me/blog/usethis-workflow-for-package-development/ (up-to-date instructions using current tools)
  • https://portlandrusergroup.github.io/pkgdev/ (presentation at the R Portland User Group)
  • https://github.com/r-lib/devtools#conscious-uncoupling
  • criteria for grouping functions in files?
    • Some people like 1 file per function.
    • Others like to group similar functions in 1 file.
• Rmarkdown presentation/slides output formats: e.g., xaringan
  • Alternative formats listed in Rstudio’s Rmarkdown documentation
    • beamer_presentation ⧉ - PDF presentations with beamer (do not use)
    • ioslides_presentation ⧉ - HTML presentations with ioslides
    • slidy_presentation ⧉ - HTML presentations with slidy
    • powerpoint_presentation ⧉ - PowerPoint presentation
    • revealjs::revealjs_presentation ⧉ - HTML presentations with reveal.js
  • Ch. 7 "xaringan Presentations" of "R Markdown: The Definitive Guide".
  • Ed’s slides
• "The book" discussed tonight:
  • https://smithjd.github.io/sql-pet/
  • https://github.com/smithjd/sql-pet
  • Workshop on April 6, 2019: https://www.eventbrite.com/e/data-workshop-docker-postgresql-r-tickets-53322384688
• dplyr joins, na_matches
  • from dplyr::inner_join: “...: other parameters passed onto methods, for instance, ‘na_matches’ to control how ‘NA’ values are matched. See join.tbl_df for more.”