Bar graphs: bar_plot

### 8.1.14 Bar graphs: bar_plot

The bar_plot command draws bar graphs.

- bar_plot takes one argument:
  M, a matrix, where each row consists of a label followed by one or more values. If the labels are followed by more than one value, then the first row needs to be identifiers.
- bar_plot(M) draws a bar graph with a bar for each label, whose height is given by the corresponding value. If the matrix has more than two columns, then there will be a bar graph for each column of values.

#### Examples

- Input:
  bar_plot([["France", 6],["Germany", 12], ["Switzerland", 5]])
  Output:
- Input:
  bar_plot([[2,"xyz","abc"],["A",2,5],["B",5,6],["C",6,6]])
  Output: