| Outlier {DescTools} | R Documentation |
Return outliers following Tukey's boxplot definition.
Outlier(x, method = c("boxplot"), na.rm = FALSE)
x |
a (non-empty) numeric vector of data values. |
method |
the method to be used. So far only Tukey's boxplot rule is implemented. |
na.rm |
logical. Should missing values be removed? Defaults to FALSE. |
Outlier detection is a tricky problem and should be handled with care. We implement only Tukey's boxplot rule as a rough idea of spotting extreme values.
the values of x lying outside the whiskers in a boxplot
Andri Signorell <andri@signorell.net>
Outlier(d.pizza$temperature, na.rm=TRUE) # find the corresponding rows d.pizza[which(d.pizza$temperature %in% Outlier(d.pizza$temperature, na.rm=TRUE)),] # outliers for the drivers tapply(d.pizza$temperature, d.pizza$driver, Outlier, na.rm=TRUE) # see also boxplot(temperature ~ driver, d.pizza)$out