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From Sean Owen <sro...@gmail.com>
Subject Re: Simple problem
Date Wed, 09 Dec 2009 15:41:31 GMT
Yes, you cannot use non-numeric IDs (anymore). See the docs for FileDataModel.

If you need to translate between Strings and numeric IDs, see the
IDMigrator interface and implementations which can help you.

On Wed, Dec 9, 2009 at 3:35 PM, F.Ozgur Catak <f.ozgur.catak@gmail.com> wrote:
> Hi,
>
> I started to use mahout. I have a problem about FileDataModel. When i use a
> csv file that use non-numeric values, I get error like
>
> 09.Ara.2009 16:54:27 org.slf4j.impl.JCLLoggerAdapter info
> INFO: Creating FileDataModel for file c:\input.csv
> 09.Ara.2009 16:54:27 org.slf4j.impl.JCLLoggerAdapter info
> INFO: Reading file info...
> Exception in thread "main" java.lang.NumberFormatException: For input
> string: "SPTBY-1711"
>    at
> java.lang.NumberFormatException.forInputString(NumberFormatException.java:48)
>    at java.lang.Long.parseLong(Long.java:403)
>    at java.lang.Long.parseLong(Long.java:461)
>    at
> org.apache.mahout.cf.taste.impl.model.file.FileDataModel.processLineWithoutID(FileDataModel.java:315)
>    at
> org.apache.mahout.cf.taste.impl.model.file.FileDataModel.processFileWithoutID(FileDataModel.java:293)
>    at
> org.apache.mahout.cf.taste.impl.model.file.FileDataModel.buildModel(FileDataModel.java:158)
>    at
> org.apache.mahout.cf.taste.impl.model.file.FileDataModel.reload(FileDataModel.java:129)
>    at
> org.apache.mahout.cf.taste.impl.model.file.FileDataModel.checkLoaded(FileDataModel.java:332)
>    at
> org.apache.mahout.cf.taste.impl.model.file.FileDataModel.getNumItems(FileDataModel.java:372)
>    at TestMahout.main(TestMahout.java:21)
>
>
>
> my input file like
>
> 5572,SPTBY-1711
> 5572,SPTBL-1711
> 5572,SPTKP-1711
> 5581,TDTBY-861
> 5581,TDTBL-861
>
>
> and few source is
>
> FileDataModel dataModel = new FileDataModel( new File("c:\\input.csv"));
> System.out.println(dataModel.getNumItems());
>
> what's the error.
>
> thanks
>

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