intro_r/README.org

* A brief introduction to R

Scripts describing simple tasks to learn the first steps to work with
data using the R programming environment

** First steps in R

 * [[./script/help_r.org][Asking for help to use R]]
 * [[./doc/install_Rsource.org][Installing R from source]]
 * [[./doc/objects.org][Objects in R]]
 * [[./script/integerq_modulo.R][Integer quocient and modulo]]
 * [[./script/non_stand_eval.R][Non-standard evaluation in R]]

** Matching patterns

 * [[./doc/match.patt.org]['gsub' and 'sub']]

** Subsetting and indexing

 * [[./script/replace_values.R][Build column in table indexing values]]

** Reading data

 * [[./script/extractpdf.R][Reading pdf files]]

** Vectorization

 * [[./script/vectorization.R][Vectorization]]

** Iteration

 * [[./script/iteration.R][Lapply, apply and for loop: brief introduction]]

** Web scraping

 * [[./script/scraping2.R][Web scraping example]]
 * [[./script/web_scraping.R][Using 'rvest' for scraping]]

** Interesting packages

 * [[./script/roadoi_package.R]['roadoi']]
 * [[./script/scraping.R]['crul' package - web scraping]]

** Data wrangling with {data.table}

 * [[./doc/datatable_intro.org][Introduction to {data.table}]]
 * [[./doc/datatable_querying.org][Querying in {data.table}: filter in ~i~ ]]
 * [[./doc/datatable_querying_j.org][Querying in {data.table}: select in ~j~ ]]