# 正負面積圖
### 預覽圖
---
[](https://book.gosu.bar/uploads/images/gallery/2019-12/efs8UfZuZHqv7SyT-%E6%AD%A3%E8%B2%A0%E9%9D%A2%E7%A9%8D%E5%9C%96.png)
### 設定值
---
- #### 資料源
```
[{
year: '1996',
north: 322,
south: 162
}, {
year: '1997',
north: 324,
south: 90
}, {
year: '1998',
north: 329,
south: 50
}, {
year: '1999',
north: 342,
south: 77
}, {
year: '2000',
north: 348,
south: 35
}, {
year: '2001',
north: 334,
south: -45
}, {
year: '2002',
north: 325,
south: -88
}, {
year: '2003',
north: 316,
south: -120
}, {
year: '2004',
north: 318,
south: -156
}, {
year: '2005',
north: 330,
south: -123
}, {
year: '2006',
north: 355,
south: -88
}, {
year: '2007',
north: 366,
south: -66
}, {
year: '2008',
north: 337,
south: -45
}, {
year: '2009',
north: 352,
south: -29
}, {
year: '2010',
north: 377,
south: -45
}, {
year: '2011',
north: 383,
south: -88
}, {
year: '2012',
north: 344,
south: -132
}, {
year: '2013',
north: 366,
south: -146
}, {
year: '2014',
north: 389,
south: -169
}, {
year: '2015',
north: 334,
south: -184
}]
```
- #### 內距
```
40, 20, 80, 60
```
- #### 前置處理函數 Transform
##### 字串展開（ fold ）
| 列表 | 設定值 |
| 類型 | 字串展開 |
| 要展開的欄位 | north,south |
| 保留欄位 | year
|
| key | type |
| Value | value |
- #### 圖 Geom
##### 區域圖（ area ）
| 列表 | 設定值 |
| 欄位 | year\*value |
| 類型 | 區域圖 |
| 顏色欄位
| type |
##### 線圖（ Line ）
| 列表 | 設定值 |
| 欄位 | year\*value
|
| 類型 | 線圖 |
| 顏色欄位 | type |
| 大小 | 2 |
- #### 圖示 Legend