Likert is an R package designed to help analyzing and visualizing Likert type items. It has been developped by Jason Bryer and Kim Speerschneider.
It permits to analyse the reading attitudes from a panel of people. Each line represents a question. The barplot explain the feeling of people concerning this question.
# Use a provided dataset
items28 <- pisaitems[, substr(names(pisaitems), 1, 5) == "ST24Q"]
# Realize the plot
l28 <- likert(items28)
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