R Track Management

This page provides the Exercism community with the information and tools needed to manage the R track.

Students
13,617
Submissions
98,039
Mentoring Discussions
1,552

The R track needs attention ⚠️

Building

Practice Exercises

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Practice Exercises are exercises designed to allow students to solve an arbitrary problem, with the aim of them making use of the concepts they have learned so far.

Synced primary repo: c0817220a396b0a45b1ac6402aa255ece654c319 (Updates should be instant)

Next goal: Implement at least 50 practice exercises. Find out more.
47 active practice exercises
Started
Attempts
Completions
Mentoring requests
Hello World Hello World
8,016
16,222 (avg. 2.0)
5,604 (69.9%)
1 (0.0%)
Two Fer Two Fer
3,799
20,649 (avg. 5.4)
1,828 (48.1%)
404 (10.6%)
Leap Leap
2,063
7,730 (avg. 3.7)
1,488 (72.1%)
300 (14.5%)
Darts Darts
510
1,853 (avg. 3.6)
382 (74.9%)
16 (3.1%)
Raindrops Raindrops
1,593
8,916 (avg. 5.6)
1,276 (80.1%)
169 (10.6%)
Hamming Hamming
1,034
5,588 (avg. 5.4)
797 (77.1%)
155 (15.0%)
Phone Number Phone Number
678
6,041 (avg. 8.9)
449 (66.2%)
69 (10.2%)
Anagram Anagram
500
3,598 (avg. 7.2)
341 (68.2%)
65 (13.0%)
Word Count Word Count
459
2,641 (avg. 5.8)
264 (57.5%)
41 (8.9%)
Rotational Cipher Rotational Cipher
274
1,539 (avg. 5.6)
194 (70.8%)
27 (9.9%)
Tournament Tournament
284
1,842 (avg. 6.5)
136 (47.9%)
20 (7.0%)
Difference of Squares Difference of Squares
569
1,212 (avg. 2.1)
480 (84.4%)
45 (7.9%)
Grains Grains
406
1,046 (avg. 2.6)
328 (80.8%)
38 (9.4%)
Space Age Space Age
336
1,291 (avg. 3.8)
262 (78.0%)
23 (6.8%)
Collatz Conjecture Collatz Conjecture
268
1,375 (avg. 5.1)
201 (75.0%)
11 (4.1%)
Perfect Numbers Perfect Numbers
262
1,067 (avg. 4.1)
195 (74.4%)
26 (9.9%)
Sieve Sieve
201
703 (avg. 3.5)
141 (70.1%)
9 (4.5%)
Acronym Acronym
220
1,029 (avg. 4.7)
149 (67.7%)
11 (5.0%)
Fizz Buzz Fizz Buzz
236
897 (avg. 3.8)
187 (79.2%)
8 (3.4%)
Secret Handshake Secret Handshake
171
391 (avg. 2.3)
116 (67.8%)
10 (5.8%)
RNA Transcription RNA Transcription
292
713 (avg. 2.4)
220 (75.3%)
21 (7.2%)
ETL ETL
99
492 (avg. 5.0)
60 (60.6%)
1 (1.0%)
Allergies Allergies
164
373 (avg. 2.3)
102 (62.2%)
2 (1.2%)
Luhn Luhn
150
702 (avg. 4.7)
104 (69.3%)
4 (2.7%)
Bob Bob
240
1,040 (avg. 4.3)
170 (70.8%)
36 (15.0%)
Isogram Isogram
162
372 (avg. 2.3)
126 (77.8%)
3 (1.9%)
Pangram Pangram
150
415 (avg. 2.8)
115 (76.7%)
4 (2.7%)
Sum of Multiples Sum of Multiples
212
550 (avg. 2.6)
158 (74.5%)
25 (11.8%)
Beer Song Beer Song
131
490 (avg. 3.7)
86 (65.6%)
0 (0.0%)
Prime Factors Prime Factors
143
379 (avg. 2.7)
103 (72.0%)
1 (0.7%)
Triangle Triangle
157
642 (avg. 4.1)
79 (50.3%)
1 (0.6%)
Nucleotide Count Nucleotide Count
153
616 (avg. 4.0)
105 (68.6%)
3 (2.0%)
Scrabble Score Scrabble Score
143
348 (avg. 2.4)
106 (74.1%)
3 (2.1%)
Diamond Diamond
110
543 (avg. 4.9)
64 (58.2%)
1 (0.9%)
Largest Series Product Largest Series Product
155
638 (avg. 4.1)
109 (70.3%)
7 (4.5%)
Pascal's Triangle Pascal's Triangle
152
595 (avg. 3.9)
89 (58.6%)
7 (4.6%)
Crypto Square Crypto Square
156
1,651 (avg. 10.6)
86 (55.1%)
5 (3.2%)
Saddle Points Saddle Points
71
236 (avg. 3.3)
51 (71.8%)
2 (2.8%)
Armstrong Numbers Armstrong Numbers
60
194 (avg. 3.2)
54 (90.0%)
2 (3.3%)
Queen Attack Queen Attack
54
232 (avg. 4.3)
35 (64.8%)
0 (0.0%)
Pythagorean Triplet Pythagorean Triplet
32
156 (avg. 4.9)
21 (65.6%)
0 (0.0%)
Reverse String Reverse String
55
175 (avg. 3.2)
45 (81.8%)
1 (1.8%)
Roman Numerals Roman Numerals
35
79 (avg. 2.3)
27 (77.1%)
0 (0.0%)
Protein Translation Protein Translation
31
200 (avg. 6.5)
20 (64.5%)
0 (0.0%)
Eliud's Eggs Eliud's Eggs
24
42 (avg. 1.8)
22 (91.7%)
0 (0.0%)
All Your Base All Your Base
42
442 (avg. 10.5)
30 (71.4%)
0 (0.0%)
Robot Simulator Robot Simulator
25
63 (avg. 2.5)
12 (48.0%)
0 (0.0%)
84 unimplemented practice exercises
Affine Cipher Affine Cipher
Alphametics Alphametics
Atbash Cipher Atbash Cipher
Bank Account Bank Account
Binary Search Binary Search
Binary Search Tree Binary Search Tree
Book Store Book Store
Bottle Song Bottle Song
Bowling Bowling
Change Change
Circular Buffer Circular Buffer
Clock Clock
Complex Numbers Complex Numbers
Connect Connect
Conway's Game of Life Conway's Game of Life
Custom Set Custom Set
D&D Character D&D Character
Dominoes Dominoes
DOT DSL DOT DSL
Error Handling Error Handling
Flatten Array Flatten Array
Food Chain Food Chain
Forth Forth
Gigasecond Gigasecond
Go Counting Go Counting
Grade School Grade School
Grep Grep
Hangman Hangman
High Scores High Scores
House House
ISBN Verifier ISBN Verifier
Killer Sudoku Helper Killer Sudoku Helper
Kindergarten Garden Kindergarten Garden
Knapsack Knapsack
Ledger Ledger
Lens Person Lens Person
Linked List Linked List
List Ops List Ops
Markdown Markdown
Matching Brackets Matching Brackets
Matrix Matrix
Meetup Meetup
Micro Blog Micro Blog
Minesweeper Minesweeper
Nth Prime Nth Prime
OCR Numbers OCR Numbers
PaaS I/O PaaS I/O
Palindrome Products Palindrome Products
Parallel Letter Frequency Parallel Letter Frequency
Pig Latin Pig Latin
Poker Poker
POV POV
Proverb Proverb
Rail Fence Cipher Rail Fence Cipher
Rational Numbers Rational Numbers
React React
Rectangles Rectangles
Resistor Color Resistor Color
Resistor Color Duo Resistor Color Duo
Resistor Color Trio Resistor Color Trio
REST API REST API
Robot Name Robot Name
Run-Length Encoding Run-Length Encoding
Satellite Satellite
Say Say
Series Series
SGF Parsing SGF Parsing
Simple Cipher Simple Cipher
Simple Linked List Simple Linked List
Spiral Matrix Spiral Matrix
Square Root Square Root
State of Tic-Tac-Toe State of Tic-Tac-Toe
Strain Strain
Sublist Sublist
Transpose Transpose
Tree Building Tree Building
Twelve Days Twelve Days
Two Bucket Two Bucket
Variable Length Quantity Variable Length Quantity
Word Search Word Search
Wordy Wordy
Yacht Yacht
Zebra Puzzle Zebra Puzzle
Zipper Zipper

Programming Tags

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Help manage the tags used to group, filter and recommend solutions, approaches and articles.

0 tags

Test Runner

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Create Test Runners that have the single responsibility of taking a solution, running all tests and returning a standardized output.

Current version: c72ad3a0a5871e834782902b968713c9f88718f4 (Takes up to 10 mins to deploy)

Next goal: Get Test Runners to Version 2. R is currently utilising a Version 1 Test Runner. Find out more.
Total Test Runner Runs
95,328
Test Run Pass Rate
22.0% (21007)
Test Run Fail Rate
76.8% (73247)
Test Run Error Rate
1.1% (1074)

Representer

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Build a Representer: a bit of code that has the single responsibility of taking a solution and returning a normalized representation of it.

Next goal: Build a Representer. Find out more.

Analyzer

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Build an Analyzer for R: Exercism's analyzers automatically assess student's submissions and provide mentor-style commentary.

Next goal: Build an Analyzer. Find out more.