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这是logistic regression的说明文档

1.  输入文件格式

    <1> 训练集文件train_file:
    以\t分割,第一列为instances, 然后依次是feature1,feature2,feature3,...,featuren, 最后是target
    eg:    
    ---------------------------------------------
    aaa1    10  9   3   11
    aaa2    11  7   4   12
    bbb1    8   11  9   9
    bbb3    12  -10 4   118
    ...
    kkkz    0   12  -1  -33
    ---------------------------------------------


    <2> 测试集文件predict_file:
    以\t分割,第一列为instances, 然后依次是feature1,feature2,feature3...
    eg:
    ---------------------------------------------
    aaa1    10  9   3
    aaa2    11  7   4
    bbb1    8   11  9
    bbb3    12  -10 4
    ...
    kkkz    0   12  -1
    ---------------------------------------------


2.  使用命令
    --------------------------------------------------     
    ./lr -n 10 -a alpha -k [1,2] -t train_file -p predict_file -o output 
    --------------------------------------------------
    
2.  求参方法
    lr使用batch gradient descent或stochastic gradient descent的策略


3. 其他
    auther: shuimuxixiha
    email:  1141482126@qq.com
    phone:  15300064077

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