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pan-ap17_gender.r
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pan-ap17_gender.r
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library(qdap)
library(XML)
library(tm)
library(splitstackshape)
library(caret)
GenerateVocabulary <- function(path, n = 1000, lowcase = TRUE, punctuations = TRUE, numbers = TRUE, whitespaces = TRUE, swlang = "", swlist = "", verbose = TRUE) {
setwd(path)
files = list.files(pattern="*.xml")
corpus.raw <- NULL
i <- 0
for (file in files) {
xmlfile <- xmlTreeParse(file, useInternalNodes = TRUE)
corpus.raw <- c(corpus.raw, xpathApply(xmlfile, "//document", function(x) xmlValue(x)))
i <- i + 1
if (verbose) print(paste(i, " ", file))
}
corpus.preprocessed <- corpus.raw
if (lowcase) {
if (verbose) print("Tolower...")
corpus.preprocessed <- tolower(corpus.preprocessed)
}
if (punctuations) {
if (verbose) print("Removing punctuations...")
corpus.preprocessed <- removePunctuation(corpus.preprocessed)
}
if (numbers) {
if (verbose) print("Removing numbers...")
corpus.preprocessed <- removeNumbers(corpus.preprocessed)
}
if (whitespaces) {
if (verbose) print("Stripping whitestpaces...")
corpus.preprocessed <- stripWhitespace(corpus.preprocessed)
}
if (swlang!="") {
if (verbose) print(paste("Removing stopwords for language ", swlang , "..."))
corpus.preprocessed <- removeWords(corpus.preprocessed, stopwords(swlang))
}
swlist = c("q","d","x","venezuela","mexico","chile","colombia","in","xd","pa","re","k","peru","m",
"lt","It","the","bogota","c","s","ah","p","epn","am","v","gt","u","mexico","at","h","t",
"to","venezolanos","im","cdmx","i","n","l","xq","eh","ft","cc","ppk","mud","etc","b","ahi",
"on","si","by")
if (swlist!="") {
if (verbose) print("Removing provided stopwords...")
corpus.preprocessed <- removeWords(corpus.preprocessed, swlist)
}
if (verbose) print("Generating frequency terms")
corpus.frequentterms <- freq_terms(corpus.preprocessed, n)
if (verbose) plot(corpus.frequentterms)
return (corpus.frequentterms)
}
GenerateBoW <- function(path, vocabulary, n = 1000, lowcase = TRUE, punctuations = TRUE, numbers = TRUE, whitespaces = TRUE, swlang = "", swlist = "", class="variety", verbose = TRUE) {
setwd(path)
truth <- read.csv("truth.txt", sep=":", header=FALSE)
truth <- truth[,c(1,4,7)]
colnames(truth) <- c("author", "gender", "variety")
i <- 0
bow <- NULL
files = list.files(pattern="*.xml")
for (file in files) {
author <- gsub(".xml", "", file)
variety <- truth[truth$author==author,"variety"]
gender <- truth[truth$author==author,"gender"]
xmlfile <- xmlTreeParse(file, useInternalNodes = TRUE)
txtdata <- xpathApply(xmlfile, "//document", function(x) xmlValue(x))
if (lowcase) {
txtdata <- tolower(txtdata)
}
if (punctuations) {
txtdata <- removePunctuation(txtdata)
}
if (numbers) {
txtdata <- removeNumbers(txtdata)
}
if (whitespaces) {
txtdata <- stripWhitespace(txtdata)
}
line <- author
freq <- freq_terms(txtdata, n)
for (word in vocabulary$WORD) {
thefreq <- 0
if (length(freq[freq$WORD==word,"FREQ"])>0) {
thefreq <- freq[freq$WORD==word,"FREQ"]
}
line <- paste(line, ",", thefreq, sep="")
}
if (class=="variety") {
line <- paste(variety, ",", line, sep="")
} else {
line <- paste(gender, ",", line, sep="")
}
bow <- rbind(bow, line)
i <- i + 1
if (verbose) {
if (class=="variety") {
print(paste(i, author, variety))
} else {
print(paste(i, author, gender))
}
}
}
return (bow)
}
n <- 1000
path_training <- "/Users/josholsan/Documents/workspace/Master/text_mining_social_media/pan-ap17-bigdata/training" # Your training path
path_test <- "/Users/josholsan/Documents/workspace/Master/text_mining_social_media/pan-ap17-bigdata/test" # Your test path
vocabulary <- GenerateVocabulary(path_training, n, swlang="es")
bow_training <- GenerateBoW(path_training, vocabulary, n, class="gender")
bow_test <- GenerateBoW(path_test, vocabulary, n, class="gender")
training <- cSplit(bow_training, "V1", ",")
test <- cSplit(bow_test, "V1", ",")
training1 <- training[,1]
training2 <- training[,3:ncol(training)]
training <- cbind(training1,training2)
names(training)[1] <- "class"
truth <- unlist(test[,1])
test <- test[,3:ncol(test)]
#train_control <- trainControl( method="repeatedcv", number = 10 , repeats = 3)
#model_SVM <- train( class~., data= training, trControl = train_control, method = "svmLinear")
#print(model_SVM)
train_control <- trainControl(method="none")
model_SVM <- train( class~., data= training, trControl = train_control, method = "svmLinear")
pred_SVM <- predict(model_SVM, test)
confusionMatrix(pred_SVM, truth)
#Randon Forest
model_RForest <- train( class~., data= training, trControl = train_control, method = "cforest")
pred_RForest <- predict(model_RForest, test)
confusionMatrix(pred_RForest, truth)
# Bayesian Generalized Linear Model
model_logistic <- train( class~., data= training, trControl = train_control, method = "bayesglm")
pred_logistic <- predict(model_logistic, test)
confusionMatrix(pred_logistic, truth)
#Boosted Classification Trees
model_classtree <- train( class~., data= training, trControl = train_control, method = "ada")
pred_classtree <- predict(model_classtree, test)
confusionMatrix(pred_classtree, truth)
#Boosted Generlized Lineal Model
model_boostedglm <- train( class~., data= training, trControl = train_control, method = "glmboost")
pred_boostedglm <- predict(model_boostedglm, test)
confusionMatrix(pred_boostedglm, truth)
#Boosted Lineal Model
model_boostedlm <- train( class~., data= training, trControl = train_control, method = "BstLm")
pred_boostedlm <- predict(model_boostedlm, test)
confusionMatrix(pred_boostedlm, truth)
#Boosted Logistic Regression
model_lr <- train( class~., data= training, trControl = train_control, method = "LogitBoost")
pred_lr <- predict(model_lr, test)
confusionMatrix(pred_lr, truth)
#Mixture Discriminant Analysis
model_mda <- train( class~., data= training, trControl = train_control, method = "mda")
pred_mda <- predict(model_mda, test)
confusionMatrix(pred_mda, truth)
#Robusted Mixture Discriminant Analysis
#model_rmda <- train( class~., data= training, trControl = train_control, method = "rmda")
#pred_rmda <- predict(model_rmda, test)
#confusionMatrix(pred_rmda, truth)