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+---
+title: "Box Plot"
+date: 2019-06-28
+tags: ["Visualization"]
+categories: ["R"]
+description: "Drawing box plot in base R"
+draft: false
+---
+
+# matrix
+```
+mat <- cbind(Uni05 = (1:100)/21, Norm = rnorm(100),
+             `5T` = rt(100, df = 5), Gam2 = rgamma(100, shape = 2))
+boxplot(mat) # directly, calling boxplot.matrix()
+```
+
+# data.frame
+```
+df. <- as.data.frame(mat)
+par(las = 1) # all axis labels horizontal
+boxplot(df., main = "boxplot(*, horizontal = TRUE)", horizontal = TRUE)
+```
+
+# formula
+```
+boxplot(wt ~ cyl, mtcars)
+```
+\ No newline at end of file