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Mahout第四讲

1.熟悉K-means、canopy算法。

参考答案：

没有固定答案

你的回答：

步骤一：将20news的文件都上传到hdfs

0.7$hadoopfs

-ls/workspace/mahout/week4/data/20news

Found2items

drwxr-xr-x-yarnsupergroup02014-09-0421:52

/workspace/mahout/week4/data/20news/20news-bydate-test

drwxr-xr-x-yarnsupergroup02014-09-0421:57

/workspace/mahout/week4/data/20news/20news-bydate-train

步骤二：对数据创建序列文件

0.7/bin$./mahoutseqdirectory-

i/workspace/mahout/week4/data/20news-

o/workspace/mahout/week4/data/20news_seq

第三步：将序列文件转化成向量

0.7/bin$./mahoutseq2sparse-

i/workspace/mahout/week4/data/20news_seq/-

o/workspace/mahout/week4/data/20news_vectors-lnorm-nv

-wttfidf

0.7/bin$hadoopfs-ls

/workspace/mahout/week4/data/20news_vectors

Found7items

drwxr-xr-x-yarnsupergroup02014-09-0422:20

/workspace/mahout/week4/data/20news_vectors/df-count

-rw-r--r--1yarnsupergroup-09-0422:18

/workspace/mahout/week4/data/20news_vectors/dictionary.file

-0

-rw-r--r--1yarnsupergroup-09-0422:20

/workspace/mahout/week4/data/20news_vectors/frequency.file

-0

drwxr-xr-x-yarnsupergroup02014-09-0422:19

/workspace/mahout/week4/data/20news_vectors/tf-vectors

drwxr-xr-x-yarnsupergroup02014-09-0422:21

/workspace/mahout/week4/data/20news_vectors/tfidf-vectors

drwxr-xr-x-yarnsupergroup02014-09-0422:18

/workspace/mahout/week4/data/20news_vectors/tokenized-

documents

drwxr-xr-x-yarnsupergroup02014-09-0422:18

/workspace/mahout/week4/data/20news_vectors/wordcount

第四步：将向量集分为训练集和测试数据

参数：

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