- 功能介绍
- 参数说明
- 脚本示例
- 脚本代码
- 脚本运行结果
功能介绍
对数据进行离散余弦变换。
参数说明
名称 | 中文名称 | 描述 | 类型 | 是否必须? | 默认值 | |
---|---|---|---|---|---|---|
inverse | 是否为逆变换 | 是否为逆变换,false表示正变换,true表示逆变换。默认正变换。 | Boolean | false | ||
selectedCol | 选中的列名 | 计算列对应的列名 | String | ✓ | ||
outputCol | 输出结果列 | 输出结果列列名,可选,默认null | String | null | ||
reservedCols | 算法保留列名 | 算法保留列 | String[] | null |
脚本示例
脚本代码
data = np.array([
["-0.6264538 0.1836433"],
["-0.8356286 1.5952808"],
["0.3295078 -0.8204684"],
["0.4874291 0.7383247"],
["0.5757814 -0.3053884"],
["1.5117812 0.3898432"],
["-0.6212406 -2.2146999"],
["11.1249309 9.9550664"],
["9.9838097 10.9438362"],
["10.8212212 10.5939013"],
["10.9189774 10.7821363"],
["10.0745650 8.0106483"],
["10.6198257 9.9438713"],
["9.8442045 8.5292476"],
["9.5218499 10.4179416"],
])
df_data = pd.DataFrame({
"features": data[:, 0],
})
data = dataframeToOperator(df_data, schemaStr='features string', op_type='stream')
dct = DctStreamOp() \
.setSelectedCol("features") \
.setOutputCol("result")
dct.linkFrom(data).print()
脚本运行结果
features result
0 -0.6264538 0.1836433 -0.31311430733060563 -0.5728251528295567
1 -0.8356286 1.5952808 0.5371552219632794 -1.7189125211901217
2 0.3295078 -0.8204684 -0.34716156955541605 0.8131559692231375
3 0.4874291 0.7383247 0.866738824045179 -0.17740998012986753
4 0.5757814 -0.3053884 0.19119672388537412 0.6230811409567939
5 1.5117812 0.3898432 1.3446515085097996 0.7933299678708727
6 -0.6212406 -2.2146999 -2.005312758591568 1.126745876574769
7 11.1249309 9.9550664 14.905809038224113 0.8272191210194105
8 9.9838097 10.9438362 14.798080330160849 -0.6788412482687869
9 10.8212212 10.5939013 15.142778339690611 0.1607394427886475
10 10.9189774 10.7821363 15.345004656570287 0.09676126975502636
11 10.0745650 8.0106483 12.788176963635138 1.4594094943741613
12 10.6198257 9.9438713 14.54072959496546 0.4779719400128842
13 9.8442045 8.5292476 12.991992573716212 0.9298149409580412
14 9.5218499 10.4179416 14.099561785095878 -0.6336325176349823