探索 qdap 的極性與內建詞彙庫
R 情感分析
Ted Kwartler
Data Dude
polarity()
主觀性詞彙庫範例：
| Word | Polarity |
|---|---|
| Amazing | Positive |
| Bad | Negative |
| Good | Positive |
| ... | ... |
| Wonderful | Positive |
情境叢集
情境叢集範例：
The DataCamp sentiment course is very GOOD for learning.
情境叢集（續）
情境叢集範例：
The DataCamp sentiment course is very GOOD for learning.
| Term | Class | Word Count |
|---|---|---|
| Very | Amplifier | 1 |
| Good | Polarized Term/Positive | 1 |
| All other words | Neutral | 7 |
情境叢集術語表
- Polarized Term－帶正向／負向意涵的詞彙
- Neutral Term－無情緒語境的詞
- Negator－反轉極性的詞，例如「not good」
- Valence Shifters－會影響情緒語境的詞
- Amplifiers－增強情緒強度的詞
- De-Amplifiers－減弱情緒強度的詞
情境叢集評分
情境叢集範例：
The DataCamp sentiment course is very GOOD for learning.
| Term | Class | Word Count | Polarity Value |
|---|---|---|---|
| Very | Amplifier | 1 | 0.8 |
| Good | Polarized Term/Positive | 1 | 1 |
| All other words | Neutral | 7 | 0 |
極性計算
| Class | Word Count | Polarity Value |
|---|---|---|
| Amplifier | 1 | 0.8 |
| Polarized Term | 1 | 1 |
| Neutral | 7 | 0 |
| Sum | 9 | 1.8 |
情境叢集範例
The DataCamp sentiment course is very GOOD for learning.
- 1 + 0.8 = 1.8
- 1+1+7 = 9
- $$\frac{1.8}{\sqrt{9}}$$
答案：0.6
一起來練習吧！
R 情感分析
