## Split field

Optionally spit into multiple visualisations based on the value of this key.

### Example

In this example dataset:

Size | Year | Green | Blue
--- | --- | --- | ---
Small | 2010 | 10 | 15
Small | 2015 | 12 | 17
Medium | 2010 | 30 | 35
Medium | 2015 | 32 | 37
Large | 2010 | 60 | 70
Large | 2015 | 62 | 72

If you split on the Year field, you would get 2 graphs/tables that look like this:

#### 2010

Size | Year | Green | Blue
--- | --- | --- | ---
Small | 2010 | 10 | 15
Medium | 2010 | 30 | 35
Large | 2010 | 60 | 70

#### 2015

Size | Year | Green | Blue
--- | --- | --- | ---
Small | 2015 | 12 | 17
Medium | 2015 | 32 | 37
Large | 2015 | 62 | 72