r - Quanteda Kwic将数据附加到输出

Question

我想将一些元数据附加到kwic输出中，例如客户ID(请参见下文)，以便可以轻松地对主文件进行查找。我尝试使用cbind附加数据，但没有正确匹配的内容。

如果可能的话，将不胜感激。

     docname    position    contextPre      keyword    contextPost          CustID
     text3790     5    nothing at all looks  good   and sounds great           1
     text3801    11    think the offer is a  good   value and has a lot        3
     text3874    10    not so sure thats a   good   word to use                5

原始data.frame

       CustID   Comment
         1      nothing at all looks good and sounds great
         2      did not see anything that was very appealing
         3      I think the offer is a good value and has a lot of potential
         4      these items look terrible how are you still in business
         5      not so sure thats a good word to use
         6      having a hard time believing some place would sell an item so low
         7      it may be worth investing in some additional equipment

Answer 1

起初，我认为理想的解决方案是使用docvars，但kwic似乎没有选择显示它们。我仍然需要将id-doc映射表与kwic结果合并。

library(data.table)
library(quanteda)

s <- "CustID,   Comment
1,      nothing at all looks good and sounds great
2,      did not see anything that was very appealing
3,      I think the offer is a good value and has a lot of potential
4,      these items look terrible how are you still in business
5,      not so sure thats a good word to use
6,      having a hard time believing some place would sell an item so low
7,      it may be worth investing in some additional equipment"

# I'm using data.table mainly to read the data easily. 
dt <- fread(s, data.table=FALSE)

# all operations below apply to data frame
myCorpus <- corpus(df$Comment)
# the Corpus and CustID came from same data frame, 
# thus ensured the mapping is correct
docvars(myCorpus, "CustID") <- df$CustID
summary(myCorpus)
# build the mapping table of docname and CustID. 
# The docname is in row.names, have to make an explicit column
dv_table <- docvars(myCorpus)
id_table <- data.frame(docname = row.names(dv_table), CustID = dv_table$CustID)
result <- kwic(myCorpus, "good", window = 3, valuetype = "glob")
id_result <- merge(result, id_table, by = "docname")

结果:

> id_result
  docname position   contextPre keyword      contextPost CustID
1   text1        5 at all looks    good and sounds great      1
2   text3        7   offer is a    good value and has         3
3   text5        6 sure thats a    good word to use           5