Hi Xiaobo, You could check the chapter 13-16 from <Mahout In Action>, it provided all the parameters the command line tool of 'mahout trainlogistic' could use. But the trainlogistic command is still only a simple example. If you wanted to use that in a production environment, you still have to write the feature encode code by yourself. The code you need to write is pretty easy, just parse the input and put that in a Vector and let the LR train the data.
Best wishes, Stanley Xu On Tue, Apr 19, 2011 at 9:09 PM, XiaoboGu <guxiaobo1...@gmail.com> wrote: > Hi, > > Thanks for your reply, after some reading of the wiki pages, I think what I > want is a Logistic Regression command-line, since the target users of Mahout > are data analysts, who can't write Java code, a command line is more > convenient. Some specific questions are : > 1. What format should we apply when preparing data for logistic regression, > can we use csv, and should we put the value for the target variable as the > first column in every row the csv file. > 2. What options can we support to the command line if there is one. > 3. How can interpret the results. > > Because Logistic Regression is the working horse of credit scoring in > industry, I think it will make Mahout friends of more analysts if LR support > is smooth. > > Regards, > > Xiaobo Gu > > From: Ted Dunning [mailto:ted.dunn...@gmail.com] > Sent: Wednesday, April 13, 2011 1:02 AM > To: user@mahout.apache.org > Cc: Xiaobo Gu > Subject: Re: Is any more detailed documentation aout the sgd logistic > regression example. > > Can you be more specific about what you have and what you want? > > The book Mahout in Action provides quite a lot of details with sample code > for a server farm. > > The TrainNewsGroups example provides code that you can copy. > > Do you have these resources? Do you want more? Did you want more theory? > > On Tue, Apr 12, 2011 at 9:11 AM, Xiaobo Gu <guxiaobo1...@gmail.com> wrote: > Hi, > Documents about sgd logistic regression itself are welcome too. > Regards, > > Xiaobo Gu > > >
