weka - weka sparse arff file

Question

I am making a sparse arff file but it will not load into Weka. I get the error that I have the wrong number of values in the @attribute class line, it expects 1 and rejects receiving 12. What am I doing wrong? My file looks like this:

%ARFF file for questions data
%

@relation brazilquestions

@attribute att0 numeric
@attribute att1 numeric
@attribute att2 numeric
@attribute att3 numeric
%there are 469 attributes which represent my bag of words
@attribute class {Odontologia_coletiva, Periodontia, Pediatria, Estomatologia,   
Dentistica, Ortodontia, Endodontia, Cardiologia, Terapeutica, 
Terapeutica_medicamentosa, Odontopediatria, Cirurgia}


@data
{126 1, 147 1, 199 1, 56 1, 367 1, 400 1 , Estomatologia}
{155 1, 76 1, 126 1, 78 1, 341 1, 148 1, Odontopediatria}
%and then 81 more instances of data

Any ideas about what is wrong with my syntax? I followed the example exactly from the book Data Mining by Witten/Frank/Hall. Thanks in advance!

Answer 1

数据部分的问题。你必须把类属性的索引

例如 ：

{126 1, 147 1, 199 1, 56 1, 367 1, 400 1 , 口腔医学}

像下面这样更正它

{126 1, 147 1, 199 1, 56 1, 367 1, 400 1,470 口腔医学}

Answer 2

在您的文档中，您声明了 5 个属性，但在 @data 中添加了 7 个属性，那么您应该完成 @data 中的其余值。你可以在手册中看到这个

Answer 3

实例类值的属性名称也需要列出。（请参阅稀疏 ARFF 文件描述。）

你的文件：

@attribute myclass {Odontologia_coletiva, Periodontia, Pediatria, Estomatologia,   
Dentistica, Ortodontia, Endodontia, Cardiologia, Terapeutica, 
Terapeutica_medicamentosa, Odontopediatria, Cirurgia}

@data
{126 1, 147 1, 199 1, 56 1, 367 1, 400 1 , Estomatologia}

应该：

@data
{126 1, 147 1, 199 1, 56 1, 367 1, 400 1 , myclass Estomatologia}

Answer 4

@ATTRIBUTE class string

尝试使用它而不是

@attribute class {Odontologia_coletiva, Periodontia, Pediatria, Estomatologia,  Dentistica, Ortodontia, Endodontia, Cardiologia, Terapeutica, Terapeutica_medicamentosa, Odontopediatria, Cirurgia}