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Fix code to make it runnable #2

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Fix code to make it runnable #2

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16 changes: 13 additions & 3 deletions README.md
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Expand Up @@ -21,24 +21,34 @@ $ make
$ sudo make install
```

## Important
### Before running examples

Make two directories:
```
mkdir tmp
mkdir tmp/files
mkdir tmp/gnuplot
```

## Example
### sample_01.rb
```bash
$ sample_01.rb lib/files/sample01.wav
$ sample_01.rb lib/files/sample_01.wav
```
音源に対して波形を描画します (横軸：時間 / 縦軸：大きさ)
![image](https://user-images.githubusercontent.com/16236972/87400404-b9041a00-c5f3-11ea-8d8d-ba0a115bc14e.png)

### sample_02.rb
```bash
$ sample_02.rb lib/files/sample02.wav
$ sample_02.rb lib/files/sample_02.wav
```
音源に対してスペクトル解析した結果を描画します (横軸：周波数 / 縦軸：大きさ)
![image](https://user-images.githubusercontent.com/16236972/87400503-dc2ec980-c5f3-11ea-9a21-5d54041471bd.png)

### sample_03.rb
```bash
$ sample_03.rb lib/files/sample03.wav
$ sample_03.rb lib/files/sample_03.wav
```
音源に対してスペクトル解析した動画を生成します (横軸：周波数 / 縦軸：大きさ)

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