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R Track Management

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

Students
14,511
Submissions
108,195
Mentoring Discussions
1,588

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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: 444d01d72a118e52e858f98f2800510b62b19b65 (Updates should be instant)

Next goal: Implement 131 practice exercises. Find out more.
76 active practice exercises
Started
Attempts
Completions
Mentoring requests
Hello World Hello World
8,882
17,731 (avg. 2.0)
6,074 (68.4%)
1 (0.0%)
Two Fer Two Fer
4,129
22,716 (avg. 5.5)
1,969 (47.7%)
411 (10.0%)
Leap Leap
2,205
8,379 (avg. 3.8)
1,580 (71.7%)
303 (13.7%)
Darts Darts
614
2,280 (avg. 3.7)
445 (72.5%)
20 (3.3%)
Raindrops Raindrops
1,688
9,506 (avg. 5.6)
1,351 (80.0%)
171 (10.1%)
Hamming Hamming
1,096
6,030 (avg. 5.5)
841 (76.7%)
156 (14.2%)
Phone Number Phone Number
727
6,510 (avg. 9.0)
475 (65.3%)
70 (9.6%)
Anagram Anagram
531
3,777 (avg. 7.1)
359 (67.6%)
67 (12.6%)
Word Count Word Count
496
2,790 (avg. 5.6)
279 (56.3%)
41 (8.3%)
Rotational Cipher Rotational Cipher
291
1,612 (avg. 5.5)
207 (71.1%)
27 (9.3%)
Tournament Tournament
304
2,238 (avg. 7.4)
144 (47.4%)
22 (7.2%)
Difference of Squares Difference of Squares
605
1,345 (avg. 2.2)
512 (84.6%)
46 (7.6%)
Grains Grains
422
1,150 (avg. 2.7)
340 (80.6%)
38 (9.0%)
Space Age Space Age
349
1,438 (avg. 4.1)
272 (77.9%)
23 (6.6%)
Collatz Conjecture Collatz Conjecture
281
1,474 (avg. 5.2)
213 (75.8%)
12 (4.3%)
Perfect Numbers Perfect Numbers
270
1,159 (avg. 4.3)
201 (74.4%)
26 (9.6%)
Sieve Sieve
208
794 (avg. 3.8)
147 (70.7%)
9 (4.3%)
Acronym Acronym
229
1,091 (avg. 4.8)
156 (68.1%)
12 (5.2%)
Fizz Buzz Fizz Buzz
250
1,001 (avg. 4.0)
199 (79.6%)
9 (3.6%)
Secret Handshake Secret Handshake
182
529 (avg. 2.9)
125 (68.7%)
11 (6.0%)
RNA Transcription RNA Transcription
306
799 (avg. 2.6)
231 (75.5%)
22 (7.2%)
ETL ETL
108
539 (avg. 5.0)
67 (62.0%)
2 (1.9%)
Allergies Allergies
178
453 (avg. 2.5)
112 (62.9%)
3 (1.7%)
Luhn Luhn
162
793 (avg. 4.9)
112 (69.1%)
5 (3.1%)
Bob Bob
248
1,115 (avg. 4.5)
176 (71.0%)
37 (14.9%)
Isogram Isogram
175
458 (avg. 2.6)
134 (76.6%)
4 (2.3%)
Pangram Pangram
156
452 (avg. 2.9)
120 (76.9%)
5 (3.2%)
Sum of Multiples Sum of Multiples
222
594 (avg. 2.7)
166 (74.8%)
26 (11.7%)
Beer Song Beer Song
139
598 (avg. 4.3)
94 (67.6%)
1 (0.7%)
Prime Factors Prime Factors
153
443 (avg. 2.9)
111 (72.5%)
3 (2.0%)
Triangle Triangle
168
727 (avg. 4.3)
86 (51.2%)
2 (1.2%)
Nucleotide Count Nucleotide Count
161
691 (avg. 4.3)
111 (68.9%)
4 (2.5%)
Scrabble Score Scrabble Score
148
363 (avg. 2.5)
110 (74.3%)
4 (2.7%)
Diamond Diamond
115
618 (avg. 5.4)
70 (60.9%)
1 (0.9%)
Largest Series Product Largest Series Product
162
685 (avg. 4.2)
116 (71.6%)
7 (4.3%)
Pascal's Triangle Pascal's Triangle
159
673 (avg. 4.2)
95 (59.7%)
7 (4.4%)
Crypto Square Crypto Square
162
1,779 (avg. 11.0)
91 (56.2%)
5 (3.1%)
Saddle Points Saddle Points
77
333 (avg. 4.3)
57 (74.0%)
2 (2.6%)
Armstrong Numbers Armstrong Numbers
69
212 (avg. 3.1)
61 (88.4%)
2 (2.9%)
Queen Attack Queen Attack
59
252 (avg. 4.3)
40 (67.8%)
0 (0.0%)
Pythagorean Triplet Pythagorean Triplet
37
200 (avg. 5.4)
27 (73.0%)
0 (0.0%)
Reverse String Reverse String
66
209 (avg. 3.2)
53 (80.3%)
1 (1.5%)
Roman Numerals Roman Numerals
41
133 (avg. 3.2)
32 (78.0%)
0 (0.0%)
Protein Translation Protein Translation
40
392 (avg. 9.8)
27 (67.5%)
0 (0.0%)
Eliud's Eggs Eliud's Eggs
32
62 (avg. 1.9)
28 (87.5%)
0 (0.0%)
All Your Base All Your Base
53
504 (avg. 9.5)
35 (66.0%)
0 (0.0%)
Robot Simulator Robot Simulator
32
84 (avg. 2.6)
17 (53.1%)
0 (0.0%)
Series Series
10
41 (avg. 4.1)
10 (100.0%)
0 (0.0%)
Conway's Game of Life Conway's Game of Life
6
19 (avg. 3.2)
4 (66.7%)
0 (0.0%)
Gigasecond Gigasecond
7
10 (avg. 1.4)
6 (85.7%)
0 (0.0%)
Square Root Square Root
8
13 (avg. 1.6)
5 (62.5%)
0 (0.0%)
Knapsack Knapsack
2
1 (avg. 0.5)
1 (50.0%)
0 (0.0%)
High Scores High Scores
7
23 (avg. 3.3)
5 (71.4%)
0 (0.0%)
ISBN Verifier ISBN Verifier
5
54 (avg. 10.8)
5 (100.0%)
0 (0.0%)
Kindergarten Garden Kindergarten Garden
5
54 (avg. 10.8)
4 (80.0%)
0 (0.0%)
Atbash Cipher Atbash Cipher
4
44 (avg. 11.0)
3 (75.0%)
0 (0.0%)
Rail Fence Cipher Rail Fence Cipher
3
1 (avg. 0.3)
1 (33.3%)
0 (0.0%)
Flatten Array Flatten Array
6
20 (avg. 3.3)
6 (100.0%)
0 (0.0%)
Matching Brackets Matching Brackets
4
3 (avg. 0.8)
2 (50.0%)
0 (0.0%)
Matrix Matrix
4
65 (avg. 16.3)
3 (75.0%)
0 (0.0%)
Resistor Color Resistor Color
4
14 (avg. 3.5)
4 (100.0%)
0 (0.0%)
Resistor Color Duo Resistor Color Duo
4
21 (avg. 5.3)
4 (100.0%)
0 (0.0%)
Simple Cipher Simple Cipher
4
9 (avg. 2.3)
2 (50.0%)
0 (0.0%)
Strain Strain
2
3 (avg. 1.5)
2 (100.0%)
0 (0.0%)
Proverb Proverb
3
12 (avg. 4.0)
2 (66.7%)
0 (0.0%)
Zebra Puzzle Zebra Puzzle
4
10 (avg. 2.5)
1 (25.0%)
0 (0.0%)
Twelve Days Twelve Days
2
1 (avg. 0.5)
1 (50.0%)
0 (0.0%)
House House
2
1 (avg. 0.5)
1 (50.0%)
0 (0.0%)
Run-Length Encoding Run-Length Encoding
4
7 (avg. 1.8)
1 (25.0%)
0 (0.0%)
List Ops List Ops
1
0 (avg. 0.0)
0 (0.0%)
0 (0.0%)
D&D Character D&D Character
2
17 (avg. 8.5)
2 (100.0%)
0 (0.0%)
Binary Search Binary Search
1
1 (avg. 1.0)
1 (100.0%)
0 (0.0%)
Robot Name Robot Name
3
0 (avg. 0.0)
0 (0.0%)
0 (0.0%)
Food Chain Food Chain
4
1 (avg. 0.3)
1 (25.0%)
0 (0.0%)
Clock Clock
3
5 (avg. 1.7)
2 (66.7%)
0 (0.0%)
Nth Prime Nth Prime
3
3 (avg. 1.0)
1 (33.3%)
0 (0.0%)
55 unimplemented practice exercises
Affine Cipher Affine Cipher
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Alphametics Alphametics
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Bank Account Bank Account
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Binary Search Tree Binary Search Tree
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Book Store Book Store
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Bottle Song Bottle Song
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Bowling Bowling
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Change Change
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Circular Buffer Circular Buffer
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Complex Numbers Complex Numbers
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Connect Connect
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Custom Set Custom Set
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Dominoes Dominoes
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DOT DSL DOT DSL
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Error Handling Error Handling
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Forth Forth
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Go Counting Go Counting
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Grade School Grade School
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Grep Grep
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Hangman Hangman
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Killer Sudoku Helper Killer Sudoku Helper
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Ledger Ledger
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Lens Person Lens Person
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Linked List Linked List
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Markdown Markdown
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Meetup Meetup
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Micro Blog Micro Blog
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Minesweeper Minesweeper
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OCR Numbers OCR Numbers
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PaaS I/O PaaS I/O
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Palindrome Products Palindrome Products
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Parallel Letter Frequency Parallel Letter Frequency
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Pig Latin Pig Latin
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Poker Poker
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POV POV
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Rational Numbers Rational Numbers
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React React
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Rectangles Rectangles
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Resistor Color Trio Resistor Color Trio
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REST API REST API
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Satellite Satellite
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Say Say
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SGF Parsing SGF Parsing
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Simple Linked List Simple Linked List
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Spiral Matrix Spiral Matrix
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State of Tic-Tac-Toe State of Tic-Tac-Toe
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Sublist Sublist
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Transpose Transpose
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Tree Building Tree Building
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Two Bucket Two Bucket
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Variable Length Quantity Variable Length Quantity
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Word Search Word Search
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Wordy Wordy
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Yacht Yacht
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Zipper Zipper
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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: 9d0baa70733051955c3e5841f9227240b711270b (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
105,453
Test Run Pass Rate
21.9% (23106)
Test Run Fail Rate
77.0% (81202)
Test Run Error Rate
1.1% (1145)

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.