K均值
==============

:download:`参考JSON<./json/kmeans.json>`

## 参数

+------------------------+--------+----------+--------------+
| 名称                   | 类型   | 是否必传 | 备注         |
+------------------------+--------+----------+--------------+
| inputarg               | array  | Y        | 输入集合     |
+------------------------+--------+----------+--------------+
| inputarg.#.tbname1     | string | Y        | 表名         |
+------------------------+--------+----------+--------------+
| inputarg.#.columnArray | string | Y        | 选择的列名   |
+------------------------+--------+----------+--------------+
| inputarg.#.iter        | int    | Y        | 最大迭代次数 |
+------------------------+--------+----------+--------------+
| inputarg.#.tol         | double | Y        | 计算的阀值   |
+------------------------+--------+----------+--------------+
| inputarg.#.k           | int    | Y        | 数据聚类数   |
+------------------------+--------+----------+--------------+

## 返回
+--------+--------+----------+--------------------------------+
| 名称   | 类型   | 是否必传 | 备注                           |
+--------+--------+----------+--------------------------------+
| result | String | Y        | 所有输出的JSON，按节点类型解析 |
+--------+--------+----------+--------------------------------+

## 算法入口及参数

+---------+-------------------------------------------------------------------+---------------+
| 名称    | 示例                                                              | 备注          |
+---------+-------------------------------------------------------------------+---------------+
| args[0] | tmptb2019062511473300088201                                       | 输入表名      |
+---------+-------------------------------------------------------------------+---------------+
| args[1] | sepal_length,sepal_width,petal_length,petal_width                 | 字段集合      |
+---------+-------------------------------------------------------------------+---------------+
| args[2] | 500                                                               | 最大迭代次数  |
+---------+-------------------------------------------------------------------+---------------+
| args[3] | 0.011                                                             | 距离的阀值    |
+---------+-------------------------------------------------------------------+---------------+
| args[4] | 3                                                                 | 聚类数        |
+---------+-------------------------------------------------------------------+---------------+
| args[5] | hdfs://namenode:9000/ispatial/sysfile/tmpv12019062605545200088312 | 结果输出地址1 |
+---------+-------------------------------------------------------------------+---------------+
| args[6] | hdfs://namenode:9000/ispatial/sysfile/tmpv22019062605545200088312 | 结果输出地址2 |
+---------+-------------------------------------------------------------------+---------------+
| args[7] | hdfs://namenode:9000/ispatial/sysfile/tmpv32019062605545200088312 | 结果输出地址3 |
+---------+-------------------------------------------------------------------+---------------+