geom_point() stat_smooth(method = gam, formula = y
compare_means():可以进行一组或多组间的比较stat_compare_mean()
he competed in 21 formula one grands prix during the 2006,207
compare_means():可以进行一组或多组间的比较stat_compare_mean()
size=5) geom_smooth(method = 'lm') stat_fit_deviations(formula
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