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cat("This is my sentence and here is the tooltip: ", sep = "")
tip

for (i in names(mtcars)) {
  cat('\n\n# Summary of the variable `', i, '`\n\n')
  x <- mtcars[, i]
  if (length(unique(x)) <= 6) {
    cat('`', i, '` is a categorical variable.\n\n')
    plot(table(x), xlab = i, ylab = 'Frequency', lwd = 10)
  } else {
    cat('Histogram for the continuous variable `', i, '`.\n\n')
    hist(x, xlab = i, main = '')
  }
}

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