In this project, you’re given a text file with chess tournament results where the information has some structure. Your job is to create an R Markdown file that generates a .CSV file (that could for example be imported into a SQL database) with the following information for all of the players:
Player’s Name, Player’s State, Total Number of Points, Player’s Pre-Rating, and Average Pre Chess Rating of Opponents
For the first player, the information would be:
Gary Hua, ON, 6.0, 1794, 1605
1605 was calculated by using the pre-tournament opponents’ ratings of 1436, 1563, 1600, 1610, 1649, 1663, 1716, and dividing by the total number of games played.
If you have questions about the meaning of the data or the results, please post them on the discussion forum. Data science, like chess, is a game of back and forth.
The chess rating system (invented by a Minnesota statistician named Arpad Elo) has been used in many other contexts, including assessing relative strength of employment candidates by human resource departments.
You may substitute another text file (or set of text files, or data scraped from web pages) of similar or greater complexity, and create your own assignment and solution. You may work in a small team. All of your code should be in an R markdown file (and published to rpubs.com); with your data accessible for the person running the script.
chess <- read.csv("C:/Users/SAGreen/Documents/SPS/Fall 2020/DATA 607/Project/Project 1/tournamentinfo.txt", header=F)
head(chess)## V1
## 1 -----------------------------------------------------------------------------------------
## 2 Pair | Player Name |Total|Round|Round|Round|Round|Round|Round|Round|
## 3 Num | USCF ID / Rtg (Pre->Post) | Pts | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
## 4 -----------------------------------------------------------------------------------------
## 5 1 | GARY HUA |6.0 |W 39|W 21|W 18|W 14|W 7|D 12|D 4|
## 6 ON | 15445895 / R: 1794 ->1817 |N:2 |W |B |W |B |W |B |W |Upon uploading the tournament data, there is a pattern of where the hyphens are located in each row. By running the head of the data, there are hyphens located in the 1st, 4th, 7th, 10th, (3n+1) row.
chess_info <- chess[-c(1:3),]
head(chess_info)## [1] "-----------------------------------------------------------------------------------------"
## [2] " 1 | GARY HUA |6.0 |W 39|W 21|W 18|W 14|W 7|D 12|D 4|"
## [3] " ON | 15445895 / R: 1794 ->1817 |N:2 |W |B |W |B |W |B |W |"
## [4] "-----------------------------------------------------------------------------------------"
## [5] " 2 | DAKSHESH DARURI |6.0 |W 63|W 58|L 4|W 17|W 16|W 20|W 7|"
## [6] " MI | 14598900 / R: 1553 ->1663 |N:2 |B |W |B |W |B |W |B |"Now that the heading is removed, I also noticed the subjects of each row also has a pattern. The numeric value of each player is listed in the 2nd, 5th, 8th (3n+2) row. The player’s states are listed in the 3rd, 6th, 9th, (3n+3) row.
n <- length(chess_info)
first_row <- chess_info[seq(2, n, 3)]
second_row <- chess_info[seq(3, n, 3)]library(stringr)
Player <- as.integer(str_extract(first_row, "\\d+"))
Name <- str_trim(str_extract(first_row, "(\\w+\\s){2,3}"))
State <- str_extract(second_row, "\\w+")
Points <- as.numeric(str_extract(first_row, "\\d+\\.\\d+"))
PreRating <- as.integer(str_extract(str_extract(second_row, "[^\\d]\\d{3,4}[^\\d]"), "\\d+"))
Opponents <- str_extract_all(str_extract_all(first_row, "\\d+\\|"), "\\d+")## Warning in stri_extract_all_regex(string, pattern, simplify = simplify, :
## argument is not an atomic vector; coercingOpponent_PreRating <- numeric(n / 3)
for (i in 1:(n / 3)) {
Opponent_PreRating[i] <- mean(PreRating[as.numeric(unlist(Opponents[Player[i]]))])
}csv <- data.frame(Name, State, Points, PreRating, Opponent_PreRating); csv## Name State Points PreRating Opponent_PreRating
## 1 GARY HUA ON 6.0 1794 1605.286
## 2 DAKSHESH DARURI MI 6.0 1553 1469.286
## 3 ADITYA BAJAJ MI 6.0 1384 1563.571
## 4 PATRICK H SCHILLING MI 5.5 1716 1573.571
## 5 HANSHI ZUO MI 5.5 1655 1500.857
## 6 HANSEN SONG OH 5.0 1686 1518.714
## 7 GARY DEE SWATHELL MI 5.0 1649 1372.143
## 8 EZEKIEL HOUGHTON MI 5.0 1641 1468.429
## 9 STEFANO LEE ON 5.0 1411 1523.143
## 10 ANVIT RAO MI 5.0 1365 1554.143
## 11 CAMERON WILLIAM MC MI 4.5 1712 1467.571
## 12 KENNETH J TACK MI 4.5 1663 1506.167
## 13 TORRANCE HENRY JR MI 4.5 1666 1497.857
## 14 BRADLEY SHAW MI 4.5 1610 1515.000
## 15 ZACHARY JAMES HOUGHTON MI 4.5 1220 1483.857
## 16 MIKE NIKITIN MI 4.0 1604 1385.800
## 17 RONALD GRZEGORCZYK MI 4.0 1629 1498.571
## 18 DAVID SUNDEEN MI 4.0 1600 1480.000
## 19 DIPANKAR ROY MI 4.0 1564 1426.286
## 20 JASON ZHENG MI 4.0 1595 1410.857
## 21 DINH DANG BUI ON 4.0 1563 1470.429
## 22 EUGENE L MCCLURE MI 4.0 1555 1300.333
## 23 ALAN BUI ON 4.0 1363 1213.857
## 24 MICHAEL R ALDRICH MI 4.0 1229 1357.000
## 25 LOREN SCHWIEBERT MI 3.5 1745 1363.286
## 26 MAX ZHU ON 3.5 1579 1506.857
## 27 GAURAV GIDWANI MI 3.5 1552 1221.667
## 28 SOFIA ADINA MI 3.5 1507 1522.143
## 29 CHIEDOZIE OKORIE MI 3.5 1602 1313.500
## 30 GEORGE AVERY JONES ON 3.5 1522 1144.143
## 31 RISHI SHETTY MI 3.5 1494 1259.857
## 32 JOSHUA PHILIP MATHEWS ON 3.5 1441 1378.714
## 33 JADE GE MI 3.5 1449 1276.857
## 34 MICHAEL JEFFERY THOMAS MI 3.5 1399 1375.286
## 35 JOSHUA DAVID LEE MI 3.5 1438 1149.714
## 36 SIDDHARTH JHA MI 3.5 1355 1388.167
## 37 AMIYATOSH PWNANANDAM MI 3.5 980 1384.800
## 38 BRIAN LIU MI 3.0 1423 1539.167
## 39 JOEL R HENDON MI 3.0 1436 1429.571
## 40 FOREST ZHANG MI 3.0 1348 1390.571
## 41 KYLE WILLIAM MURPHY MI 3.0 1403 1248.500
## 42 JARED GE MI 3.0 1332 1149.857
## 43 ROBERT GLEN VASEY MI 3.0 1283 1106.571
## 44 JUSTIN D SCHILLING MI 3.0 1199 1327.000
## 45 DEREK YAN MI 3.0 1242 1152.000
## 46 JACOB ALEXANDER LAVALLEY MI 3.0 377 1357.714
## 47 ERIC WRIGHT MI 2.5 1362 1392.000
## 48 DANIEL KHAIN MI 2.5 1382 1355.800
## 49 MICHAEL J MARTIN MI 2.5 1291 1285.800
## 50 SHIVAM JHA MI 2.5 1056 1296.000
## 51 TEJAS AYYAGARI MI 2.5 1011 1356.143
## 52 ETHAN GUO MI 2.5 935 1494.571
## 53 JOSE C YBARRA MI 2.0 1393 1345.333
## 54 LARRY HODGE MI 2.0 1270 1206.167
## 55 ALEX KONG MI 2.0 1186 1406.000
## 56 MARISA RICCI MI 2.0 1153 1414.400
## 57 MICHAEL LU MI 2.0 1092 1363.000
## 58 VIRAJ MOHILE MI 2.0 917 1391.000
## 59 SEAN M MC MI 2.0 853 1319.000
## 60 JULIA SHEN MI 1.5 967 1330.200
## 61 JEZZEL FARKAS ON 1.5 955 1327.286
## 62 ASHWIN BALAJI MI 1.0 1530 1186.000
## 63 THOMAS JOSEPH HOSMER MI 1.0 1175 1350.200
## 64 BEN LI MI 1.0 1163 1263.000