Download kommunalvalgsdata fra kmdvalg.dk.
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library(XML) | |
# main page | |
url <- "http://kmdvalg.dk/main" | |
# read links | |
url.data <- readLines(url) | |
doc <- htmlTreeParse(url.data, useInternalNodes = TRUE) | |
#grab urls | |
urls <- unlist(xpathApply(doc, "//div[@class='LetterGroup']//a[@href]", | |
xmlGetAttr, "href")) | |
# function | |
get.data <- function(url){ | |
# read url | |
cat("url:", url) | |
url.data <- readLines(url) | |
tables <- htmlTreeParse(url.data, useInternalNodes = TRUE, encoding = "UTF-8") | |
#grab data | |
st.nu <- xpathSApply(tables, "//td[@class='StemmerNu']", xmlValue) | |
st.sidst <- xpathSApply(tables, "//td[@class='StemmerSidst']", xmlValue) | |
navn <- xpathSApply(tables, "//td[@class='kandidat']", xmlValue) | |
kom <- xpathSApply(tables, "//title", xmlValue) | |
# clean | |
st.nu <- st.nu[c(rep(TRUE,1),FALSE)] | |
st.sidst <- st.sidst[c(rep(TRUE,1),FALSE)] | |
navn <- navn[c(rep(FALSE,1),TRUE)] | |
# clean some more | |
st.nu <- gsub("\\.","", st.nu) | |
st.sidst <- gsub("\\.","", st.sidst) | |
st.sidst <- gsub("\\(|\\)", "", st.sidst) | |
kom <- gsub("Kommunalvalg ","", kom) | |
kom <- rep(kom, length(st.nu)) | |
return(cbind(navn,st.nu,st.sidst,kom)) | |
} | |
data <- list() | |
for (i in seq_along(urls)){ | |
# extracting information | |
data[[i]] <- get.data(urls[i]) | |
# waiting one second between hits | |
Sys.sleep(1) | |
cat(" done!\n") | |
} | |
data <- data.frame(do.call(rbind, data), stringsAsFactors=F) | |
colnames(data) <- c("kandidatlister","stemmetal","ændring","kommune") |
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