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library(irutils)
library(ggplot2)
theme_update(panel.background=theme_blank(), panel.grid.major=theme_blank(), panel.border=theme_blank())
#How much do you agree or disagree with these statements about reading?
data(pisana)
items28 = pisana[,substr(names(pisana), 1,5) == 'ST24Q']
head(items28); ncol(items28)
names(items28) = c("I read only if I have to.",
"Reading is one of my favorite hobbies.",
"I like talking about books with other people.",
"I find it hard to finish books.",
"I feel happy if I receive a book as a present.",
"For me, reading is a waste of time.",
"I enjoy going to a bookstore or a library.",
"I read only to get information that I need.",
"I cannot sit still and read for more than a few minutes.",
"I like to express my opinions about books I have read.",
"I like to exchange books with my friends")
for(i in 1:ncol(items28)) {
items28[,i] = factor(items28[,i], levels=1:4,
labels=c('Strongly disagree', 'Disagree', 'Agree', 'Strongly Agree'), ordered=TRUE)
}
l28 = likert(items28)
summary(l28)
plot(l28)
plot(l28, type='heat')
#Group by country
l28g = likert(items28, grouping = pisana$CNT)
plot(l28g, low.color='maroon', high.color='burlywood4')
#How often do you read these materials because you want to?
items29 = pisana[,substr(names(pisana), 1,5) == 'ST25Q']
head(items29); ncol(items29)
names(items29) = c("Magazines", "Comic books", "Fiction", "Non-fiction books", "Newspapers")
for(i in 1:ncol(items29)) {
items29[,i] = factor(items29[,i], levels=1:5,
labels=c('Never or almost never', 'A few times a year', 'About once a month',
'Several times a month', 'Several times a week'), ordered=TRUE)
}
l29 = likert(items29)
summary(l29)
plot(l29, low.color='maroon', high.color='burlywood4') +
opts(title="How often do you read these materials because you want to?")
plot(l29, type='heat') + opts(title="How often do you read these materials because you want to?")
l29g = likert(items29, grouping=pisana$CNT)
summary(l29g)
plot(l29g, low.color='maroon', high.color='burlywood4') +
opts(title="How often do you read these materials because you want to?")