-
-
Save dsparks/819618 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
# Illustrative use of plyr | |
# LOAD LIBRARIES REQUIRED | |
library(plyr); | |
library(XML) | |
# FIGURE OUT PATTERN OF URL FOR EACH SEASON | |
url.b1 = 'http://ca.sports.yahoo.com/nhl/stats/byposition?pos=C,RW,LW,D'; | |
url.b2 = '&sort=14&conference=NHL&year=season_'; | |
url.b3 = y; | |
# WRITE FUNCTION TO EXTRACT DATA FOR A SEASON | |
extract_data = function(y){ | |
url = paste(url.b1, url.b2, as.character(y), sep = ''); | |
tab = readHTMLTable(url, stringsAsFactors = F)[[4]]; | |
tab = tab[,-c(2*(2:16))] # remove empty columns | |
names(tab) = tab[1,]; | |
tab = tab[-1,]; | |
tab$year = y; | |
tab | |
} | |
# APPLY FUNCTION TO EXTRACT DATA FOR ALL SEASONS | |
skaters = ldply(2005:2010, extract_data, .progress = 'text'); | |
# CLEAN DATA FRAME AS REQUIRED | |
skaters[,-c(1, 2)] = sapply(skaters[, -c(1, 2)], as.numeric); | |
skaters[, c(1, 2)] = sapply(skaters[, c(1, 2)], as.factor); | |
names(skaters) = tolower(names(skaters)); | |
names(skaters)[7] = 'pm' | |
write.csv(skaters, 'skaters.csv', row.names = F); |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment