3.1 CREATING A BASIC HISTOGRAM

'data.frame':   30 obs. of  2 variables:
 $ weight: num  4.17 5.58 5.18 6.11 4.5 4.61 5.17 4.53 5.33 5.14 ...
 $ group : Factor w/ 3 levels "ctrl","trt1",..: 1 1 1 1 1 1 1 1 1 1 ...

3.2 OPTIONAL PARAMETERS

## 3.3 CHANGING BIN SIZES

'data.frame':   1000 obs. of  1 variable:
 $ var_name: num  440 514 554 383 521 ...

## 3.4 Advance Histogram Features

[1] 5.073
[1] 0.7011918