| Title: | Helper Functions for Creating Tutorials |
|---|---|
| Description: | Helper functions for creating, editing, and testing tutorials created with the 'learnr' package. Provides a simple method for allowing students to download their answers to tutorial questions. For examples of its use, see the 'r4ds.tutorials' package. |
| Authors: | David Kane [aut, cre, cph]
|
| Maintainer: | David Kane <[email protected]> |
| License: | MIT + file LICENSE |
| Version: | 0.3.1 |
| Built: | 2024-12-07 20:34:13 UTC |
| Source: | CRAN |
An add-in for formatting tutorials.
Uses format_tutorial() to format the tutorial Rmd open in the current editor
check_current_tutorial()check_current_tutorial()
There are three code components: the use of a copy-code button,
an information request, and a download page. It is tricky to know where to
store the "truth" of what these components should look like. For now, the
truth is defined as the skeleton.Rmd which defines the template for
creating a new tutorial.
All tutorials should also have library(learnr) and
library(tutorial.helpers), both of which exist in the skeleton
check_tutorial_defaults(tutorial_paths)check_tutorial_defaults(tutorial_paths)
tutorial_paths |
Character vector of the paths to the tutorials to be examined. |
No return value, called for side effects.
check_tutorial_defaults(tutorial_paths = return_tutorial_paths("tutorial.helpers"))check_tutorial_defaults(tutorial_paths = return_tutorial_paths("tutorial.helpers"))
Determine the code chunk name of a new exercise in a tutorial.
determine_code_chunk_name(file_path = NULL)determine_code_chunk_name(file_path = NULL)
file_path |
Character string of the file path to the tutorial |
The section id of the exercise based on its section
Finds the number of the next exercise in a tutorial
determine_exercise_number(file_path = NULL)determine_exercise_number(file_path = NULL)
file_path |
Character string of the file path to the tutorial |
The next exercise number based on the file argument or the active document.
A function for formatting tutorial Rmd files. Used by check_current_tutorial() to re-format the currently open tutorial in RStudio. It renumbers the exercises so that they are in order. It ensures that chunk labels use this numbering, along with the section title.
format_tutorial(file_path)format_tutorial(file_path)
file_path |
Character string. |
Formatted document with correct exercise, hint and test chunk labels.
Grabs information from the learnr session environment, not
directly from the session object itself. Since we are using the session
environment, we currently don't (?) have a way to save the environment and
hence can't test this function.
get_submissions_from_learnr_session(sess)get_submissions_from_learnr_session(sess)
sess |
session object from shiny with learnr |
a list which includes the exercise submissions of tutorial
We define "testing" a tutorial as (successfully) running
render() on it. This function renders all the tutorials provided in
tutorial_paths. There is no check to see if the rendered file looks OK.
If a tutorial fails to render, then (we assume!) an error will be generated
which will then filter up to our testing rig.
knit_tutorials(tutorial_paths)knit_tutorials(tutorial_paths)
tutorial_paths |
Character vector of the paths to the tutorials to be knitted. |
No return value, called for side effects.
knit_tutorials(tutorial_paths = return_tutorial_paths("tutorial.helpers"))knit_tutorials(tutorial_paths = return_tutorial_paths("tutorial.helpers"))
When writing tutorials, it is handy to be able to insert the
skeleton for a new code exercise or question. We bind make_exercise() and
friends as an RStudio add-in to provide this functionality. Note that the
function determines the correct exercise number to use and also adds
appropriate code chunk names, based on the exercise number and section
title.
make_exercise(type = "code", file_path = NULL) make_no_answer() make_yes_answer()make_exercise(type = "code", file_path = NULL) make_no_answer() make_yes_answer()
type |
Character of question type. Must be one of "code", "no-answer", or "yes-answer". |
file_path |
Character path to a file. If NULL, the RStudio active document is used, which is the default behavior. An actual file path is used for testing. |
It appears that the RStudio addins must have function names only as
the Binding value. In other words, you can't have make_exercise(type = 'no-answer') as the value. So, we need two extra functions —
make_no_answer() and make_yes_answer() —which just call
make_exercise() while passing in the correct argument.
Exercise skeleton corresponding to the type argument.
This function processes submissions from a directory containing HTML/XML files. It extracts tables from the files, filters them based on a pattern and key variables, and returns either a summary tibble or a combined tibble with all the data.
process_submissions( path, pattern = ".", return_value = "Summary", key_vars = NULL, verbose = 0, keep_file_name = NULL )process_submissions( path, pattern = ".", return_value = "Summary", key_vars = NULL, verbose = 0, keep_file_name = NULL )
path |
The path to the directory containing the HTML/XML files. |
pattern |
The pattern to match against the file names (default: "."). |
return_value |
The type of value to return. Allowed values are "Summary" (default) or "All". |
key_vars |
A character vector of key variables to extract from the "id" column (default: NULL). |
verbose |
An integer specifying the verbosity level. 0: no messages, 1: file count messages, 2: some detailed messages about files, 3: detailed messages including all file problems (default: 0). |
keep_file_name |
Specifies whether to keep the file name in the summary tibble. Allowed values are NULL (default), "All" (keep entire file name), "Space" (keep up to first space), or "Underscore" (keep up to first underscore). Only used when |
If return_value is "Summary", returns a tibble with one row for each file, columns corresponding to the key_vars,
and an additional "answers" column indicating the number of rows in each tibble.
If return_value is "All", returns a tibble with all the data combined from all the files.
## Not run: # Process submissions with default settings process_submissions("path/to/directory") # Process submissions with a specific pattern and key variables process_submissions("path/to/directory", pattern = "^submission", key_vars = c("name", "email")) # Process submissions and return all data process_submissions("path/to/directory", return_value = "All") # Process submissions with verbose output (level 3) process_submissions("path/to/directory", verbose = 3) # Process submissions and keep the entire file name in the summary tibble process_submissions("path/to/directory", return_value = "Summary", keep_file_name = "All") ## End(Not run)## Not run: # Process submissions with default settings process_submissions("path/to/directory") # Process submissions with a specific pattern and key variables process_submissions("path/to/directory", pattern = "^submission", key_vars = c("name", "email")) # Process submissions and return all data process_submissions("path/to/directory", return_value = "All") # Process submissions with verbose output (level 3) process_submissions("path/to/directory", verbose = 3) # Process submissions and keep the entire file name in the summary tibble process_submissions("path/to/directory", return_value = "Summary", keep_file_name = "All") ## End(Not run)
Takes a package name and returns a character vector of all the paths to tutorials in the installed package. Assumes that every Rmd file in inst/tutorials/*/ is a tutorial, which should be true.
return_tutorial_paths(package)return_tutorial_paths(package)
package |
Character vector of the package name to be tested. |
Character vector of the full paths to all installed tutorials in
package.
return_tutorial_paths('learnr')return_tutorial_paths('learnr')
This functions sets the pkgType global option to "binary" in your
.Rprofile. New R users, especially those on Windows, should never install
from source. Doing so fails too often, and too confusingly. It also sets the
value for this R session. So, you do not need to either restart R nor source
the .Rprofile by hand.
You can examine your .Rprofile to confirm this change with
usethis::edit_r_profile()
set_binary_only_in_r_profile()set_binary_only_in_r_profile()
No return value, called for side effects.
This function changes RStudio settings in order to make learning easier for
new users. These settings are stored in:
~/.config/rstudio/rstudio-prefs.json. The most important changes are
save_workspace to "never", load_workspace to FALSE, and
"insert_native_pipe_operator" to TRUE. All those changes are good for any
user, new or old.
We also change rmd_viewer_type to "pane", show_hidden_files to TRUE,
rmd_chunk_output_inline to FALSE, source_with_echo to TRUE, and
packages_pane_enabled to FALSE. These settings make RStudio less
confusing to new users. The rmd_viewer_type setting is especially useful to
students copy/pasting from the Console/Terminal to a tutorial.
The last two changes are setting both rainbow_parentheses and
syntax_color_console to TRUE. We think that these settings make coding
errors less likely.
set_rstudio_settings(set.binary = TRUE)set_rstudio_settings(set.binary = TRUE)
set.binary |
Logical, set to |
No return value, called for side effects.
This function reads the contents of a text file and either prints the specified range of rows that match a given regular expression pattern or prints the code lines within R code chunks. If start is a negative number, it prints the last abs(start) lines, ignoring missing lines at the end of the file.
show_file(path, start = 1, end = NULL, pattern = NULL, chunk = "None")show_file(path, start = 1, end = NULL, pattern = NULL, chunk = "None")
path |
A character vector representing the path to the text file. |
start |
An integer specifying the starting row number (inclusive) to consider. Default is 1. If negative, it represents the number of lines to print from the end of the file. |
end |
An integer specifying the ending row number (inclusive) to consider. Default is the last row. |
pattern |
A regular expression pattern to match against each row. Default is NULL (no pattern matching). |
chunk |
A character string indicating whether to print code lines within R code chunks. Possible values are "None" (default), "All" (print all code chunks), or "Last" (print only the last code chunk). |
The function prints the contents of the specified range of rows that match the pattern (if provided) or the code lines within R code chunks (if chunk is TRUE) to the console. If no rows match the pattern, nothing is printed. If start is negative, the function prints the last abs(start) lines, ignoring missing lines at the end of the file.
## Not run: # Display all rows of a text file show_file("path/to/your/file.txt") # Display rows 5 to 10 of a text file show_file("path/to/your/file.txt", start = 5, end = 10) # Display all rows of a text file that contain the word "example" show_file("path/to/your/file.txt", pattern = "example") # Print code lines within R code chunks show_file("path/to/your/file.txt", chunk = TRUE) # Display the last 5 lines of a text file, ignoring missing lines at the end show_file("path/to/your/file.txt", start = -5) ## End(Not run)## Not run: # Display all rows of a text file show_file("path/to/your/file.txt") # Display rows 5 to 10 of a text file show_file("path/to/your/file.txt", start = 5, end = 10) # Display all rows of a text file that contain the word "example" show_file("path/to/your/file.txt", pattern = "example") # Print code lines within R code chunks show_file("path/to/your/file.txt", chunk = TRUE) # Display the last 5 lines of a text file, ignoring missing lines at the end show_file("path/to/your/file.txt", start = -5) ## End(Not run)
The following function was modified from Colin Rundel's
learnrhash package, available at https://github.com/rundel/learnrhash. Note
that when including these functions in a learnr Rmd document it is
necessary that the server function, submission_server(), be included in
an R chunk where context="server".
submission_server() submission_uisubmission_server() submission_ui
An object of class shiny.tag of length 3.
No return value, called for side effects.
An object of class shiny.tag.
if(interactive()){ submission_server() } if(interactive()){ submision_ui }if(interactive()){ submission_server() } if(interactive()){ submision_ui }
Take a tutorial session, extract out all the submitted answers, and write out an html file with all of those answers.
write_answers(file, session, is_test = FALSE)write_answers(file, session, is_test = FALSE)
file |
Location to render answers to. Output file type determined by file suffix. Only "html" is acceptable. |
session |
Session object from |
is_test |
|
We only keep track of the questions/exercises that the student has completed. The other obvious approach is to keep all the questions/exercises and leave unanswered ones as NA. Not sure if that approach is better, or even possible.
if(interactive()){ write_answers("getting-started_answers.html", sess) }if(interactive()){ write_answers("getting-started_answers.html", sess) }