21.13 Remove English Stop Words

docs <- tm_map(docs, removeWords, stopwords("english"))

Stop words are common words found in a language. Words like for, very, and, of, are, etc, are common stop words. Notice they have been removed from the above text.

We can list the stop words:

length(stopwords("english"))

## [1] 174

stopwords("english")

##   [1] "i"          "me"         "my"         "myself"     "we"        
##   [6] "our"        "ours"       "ourselves"  "you"        "your"      
##  [11] "yours"      "yourself"   "yourselves" "he"         "him"       
##  [16] "his"        "himself"    "she"        "her"        "hers"      
##  [21] "herself"    "it"         "its"        "itself"     "they"      
##  [26] "them"       "their"      "theirs"     "themselves" "what"      
##  [31] "which"      "who"        "whom"       "this"       "that"      
##  [36] "these"      "those"      "am"         "is"         "are"       
##  [41] "was"        "were"       "be"         "been"       "being"     
##  [46] "have"       "has"        "had"        "having"     "do"        
##  [51] "does"       "did"        "doing"      "would"      "should"    
##  [56] "could"      "ought"      "i'm"        "you're"     "he's"      
##  [61] "she's"      "it's"       "we're"      "they're"    "i've"      
##  [66] "you've"     "we've"      "they've"    "i'd"        "you'd"     
##  [71] "he'd"       "she'd"      "we'd"       "they'd"     "i'll"      
##  [76] "you'll"     "he'll"      "she'll"     "we'll"      "they'll"   
##  [81] "isn't"      "aren't"     "wasn't"     "weren't"    "hasn't"    
##  [86] "haven't"    "hadn't"     "doesn't"    "don't"      "didn't"    
##  [91] "won't"      "wouldn't"   "shan't"     "shouldn't"  "can't"     
##  [96] "cannot"     "couldn't"   "mustn't"    "let's"      "that's"    
## [101] "who's"      "what's"     "here's"     "there's"    "when's"    
## [106] "where's"    "why's"      "how's"      "a"          "an"        
## [111] "the"        "and"        "but"        "if"         "or"        
## [116] "because"    "as"         "until"      "while"      "of"        
## [121] "at"         "by"         "for"        "with"       "about"     
## [126] "against"    "between"    "into"       "through"    "during"    
## [131] "before"     "after"      "above"      "below"      "to"        
## [136] "from"       "up"         "down"       "in"         "out"       
## [141] "on"         "off"        "over"       "under"      "again"     
## [146] "further"    "then"       "once"       "here"       "there"     
## [151] "when"       "where"      "why"        "how"        "all"       
## [156] "any"        "both"       "each"       "few"        "more"      
## [161] "most"       "other"      "some"       "such"       "no"        
## [166] "nor"        "not"        "only"       "own"        "same"      
## [171] "so"         "than"       "too"        "very"

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