# Hello, world!
#
# This is an example function named 'hello'
# which prints 'Hello, world!'.
#
# You can learn more about package authoring with RStudio at:
#
# http://r-pkgs.had.co.nz/
#
# Some useful keyboard shortcuts for package authoring:
#
# Build and Reload Package: 'Ctrl + Shift + B'
# Check Package: 'Ctrl + Shift + E'
# Test Package: 'Ctrl + Shift + T'
hello <- function(name) {
print(paste0("Hi there ",name));
}
bye <- function(name) {
print(paste0("Good-bye ",name));
}
extractchoices <- function(csvFile) {
wise <- read.csv(csvFile, header=TRUE);
library(rjson);
wise$studentData <- as.character(wise$student.data)
#wise$response <- as.character(sapply(wise$studentData,function(r){rl <- fromJSON(r); return(ifelse(length(rl)>0&&!is.null(rl$response),rl$response,""))}))
i <- 1
while (i < 10){
temp <- as.character(sapply(wise$studentData,function(r){rl <- fromJSON(r); return(ifelse(length(rl)>0&&!is.null(rl$studentChoices)&&length(rl$studentChoices)>=i&&!is.null(rl$studentChoices[[i]]
$text),rl$studentChoices[[i]]$text,""))}))
#is there anything relevant in temp?
if (sum(temp!="") > 0){
wise[,paste0("choice.",i)] <- temp
} else {
break
}
i <- i+1
}
wise$studentData <- NULL
write.csv(wise, row.names=FALSE, na="");
}
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