我在 Java 上使用 WEKA 的 API 来开发应用程序。当运行 StringToWordVector 过滤器(转换字符串类型属性)到我的 input.arff 文件时,如下所示:
@relation Instantzien_Bektorea
@attribute 5_Ainf_Lema string
@attribute 6_Arg_PosKat {IZE,ADJ,ADI,ADB,DET,IOR,LOT,PRT,ITJ,BST,ADL,ADT,SIG,SNB,LAB,POST}
@attribute 7_Arg_Pos_AzpiKat {ARR,IZB,LIB,ZKI,GAL,SIN,ADK,ADP,FAK,ERKARR,ERKIND,NOLARR,NOLGAL,DZH,BAN,ORD,DZG,ORO,PERARR,PERIND,IZGMGB,IZGGAL,BIH,ELK,JOK,JNT,HUTSA}
@attribute 8_Arg_Kasua {abl,abu,abz,ala,soz,dat,des,erg,gel,gen,ine,ins,mot,abs,par,pro,bnk,desk,aurk,bald,emen,erlt,espl,haut,helb,kaus,konpl,kont,denb,mod,mos,ondo,zhg,neg,gen_post_ine,gen_post,gen_post_abs,ala_des,soz_post_ala,zero_post_abl,-}
@attribute 9_Argumentuaren_FSint {-,subj,obj}
@attribute 10_Arg_Posizioa {Aurretik,Atzetik}
@attribute 11_Dist_HKop numeric
@attribute 12_Dist_ArgKop numeric
@attribute 13_Framea string
@attribute 15_Frame_Unekoa string
@attribute Klasea {arg0,arg1,arg2,argM*LOC,argM*TMP,argM*MNR,argM*Cause,argM*ADV,argM*PRP,argM*-,argM*NEG,argM*DIS}
@data
eta_gero,LOT,ARR,denb,-,Aurretik,999,1,argM_PRED_arg1,ARGM_PRED_arg1,argM*TMP
Ainf_Lema,ADI,SIN,mod,-,Aurretik,1,1,argM_arg0_arg1_PRED,argM_arg0_ARG1_PRED,arg1
Ainf_Lema,IZE,ARR,abs,subj,Aurretik,999,2,arg0_argM_arg1_PRED,ARG0_argM_arg1_PRED,arg0
...
我得到了另外一堆写在 output.arrf 中的实例,如下所示:
@relation 'Train_Instantzien_Bektorea-weka.filters.unsupervised.attribute.StringToWordVector-R1,9,10-W1000-prune-rate-1.0-N0-stemmerweka.core.stemmers.NullStemmer-M1-tokenizerweka.core.tokenizers.WordTokenizer -delimiters \" \\r\\n\\t.,;:\\\'\\\"()?!\"'
@attribute 6_Arg_PosKat {IZE,ADJ,ADI,ADB,DET,IOR,LOT,PRT,ITJ,BST,ADL,ADT,SIG,SNB,LAB,POST}
@attribute 7_Arg_Pos_AzpiKat {ARR,IZB,LIB,ZKI,GAL,SIN,ADK,ADP,FAK,ERKARR,ERKIND,NOLARR,NOLGAL,DZH,BAN,ORD,DZG,ORO,PERARR,PERIND,IZGMGB,IZGGAL,BIH,ELK,JOK,JNT,HUTSA}
@attribute 8_Arg_Kasua {abl,abu,abz,ala,soz,dat,des,erg,gel,gen,ine,ins,mot,abs,par,pro,bnk,desk,aurk,bald,emen,erlt,espl,haut,helb,kaus,konpl,kont,denb,mod,mos,ondo,zhg,neg,gen_post_ine,gen_post,gen_post_abs,ala_des,soz_post_ala,zero_post_abl,-}
@attribute 9_Argumentuaren_FSint {-,subj,obj}
@attribute 10_Arg_Posizioa {Aurretik,Atzetik}
@attribute 11_Dist_HKop numeric
@attribute 12_Dist_ArgKop numeric
@attribute Klasea {arg0,arg1,arg2,argM*LOC,argM*TMP,argM*MNR,argM*Cause,argM*ADV,argM*PRP,argM*-,argM*NEG,argM*DIS}
@attribute ARG0_PRED_arg1 numeric
@attribute ARG0_arg1_PRED numeric
@attribute ARG0_arg1_PRED_arg1_argM numeric
@attribute ARG0_arg1_PRED_argM numeric
@attribute ARG0_arg1_PRED_argM_argM numeric
@attribute ARG0_argM_PRED numeric
...
@attribute argM_PRED_ARG1_argM_argM numeric
@attribute argM_PRED numeric
@attribute argM_PRED_arg1_ARGM numeric
...
@attribute ARGM_argM_PRED_arg1_argM numeric
@attribute arg0_ARGM_arg1_PRED numeric
@attribute arg0_ARGM_arg1_PRED_argM numeric
@attribute arg0_arg1_PRED_ARGM_argM numeric
@attribute eta_gero numeric
@attribute gaur numeric
@data
{0 LOT,2 denb,5 999,6 1,7 argM*TMP,90 1,162 1,197 1}
{0 ADI,1 SIN,2 mod,5 1,6 1,7 arg1,19 1,42 1,93 1}
{2 abs,3 subj,5 999,6 2,16 1,19 1,29 1}
正如您将在 output.arff 文件中看到的,一些属性从实例中消失(第一个实例-> 没有第一个属性,没有第三个属性等)这是为什么?
运行过滤器的 Java 代码如下所示:
// StringToWordVector filter
String[] options = new String[1];
options[0] = "-R <1,9,10>";
StringToWordVector filter = new StringToWordVector();
filter.setOptions(options);
filter.setInputFormat(input.arff);
Instances output_inst = Filter.useFilter(input_inst, filter);
问题可能出在哪里?非常感谢。