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How to extract words from a string vector in R?
To extract words from a string vector, we can use word function of stringr package. For example, if we have a vector called x that contains 100 words then first 20 words can be extracted by using the command word(x,start=1,end=20,sep=fixed(" ")). If we want to start at any other word then starting value will be changed accordingly.
Example
x<-c("R is a programming language and software environment for statistical analysis, graphics representation and reporting. R was created by Ross Ihaka and Robert Gentleman at the University of Auckland, New Zealand, and is currently developed by the R Development Core Team. R is freely available under the GNU General Public License, and pre-compiled binary versions are provided for various operating systems like Linux, Windows and Mac. This programming language was named R, based on the first letter of first name of the two R authors (Robert Gentleman and Ross Ihaka), and partly a play on the name of the Bell Labs Language S.")
xOutput
[1] "R is a programming language and software environment for statistical analysis, graphics representation and reporting. R was created by Ross Ihaka and Robert Gentleman at the University of Auckland, New Zealand, and is currently developed by the R Development Core Team. R is freely available under the GNU General Public License, and pre-compiled binary versions are provided for various operating systems like Linux, Windows and Mac. This programming language was named R, based on the first letter of first name of the two R authors (Robert Gentleman and Ross Ihaka), and partly a play on the name of the Bell Labs Language S."
Example
library(stringr)
word(x,start=1,end=5,sep=fixed(" "))Output
[1] "R is a programming language"
Example
word(x,start=1,end=20,sep=fixed(" "))Output
[1] "R is a programming language and software environment for statistical analysis, graphics representation and reporting. R was created by Ross"
Example
word(x,start=1,end=10,sep=fixed(" "))Output
[1] "R is a programming language and software environment for statistical"
Example
word(x,start=1,end=15,sep=fixed(" "))Output
[1] "R is a programming language and software environment for statistical analysis, graphics representation and reporting."
Example
word(x,start=1,end=50,sep=fixed(" "))Output
[1] "R is a programming language and software environment for statistical analysis, graphics representation and reporting. R was created by Ross Ihaka and Robert Gentleman at the University of Auckland, New Zealand, and is currently developed by the R Development Core Team. R is freely available under the GNU General Public"
Example
word(x,start=11,end=20,sep=fixed(" "))Output
[1] "analysis, graphics representation and reporting. R was created by Ross"
Example
word(x,start=51,end=60,sep=fixed(" "))Output
[1] "License, and pre-compiled binary versions are provided for various operating"
Example
word(x,start=6,end=10,sep=fixed(" "))Output
[1] "and software environment for statistical"
Example
word(x,start=11,end=60,sep=fixed(" "))Output
[1] "analysis, graphics representation and reporting. R was created by Ross Ihaka and Robert Gentleman at the University of Auckland, New Zealand, and is currently developed by the R Development Core Team. R is freely available under the GNU General Public License, and pre-compiled binary versions are provided for various operating"
Example
word(x,start=1,end=90,sep=fixed(" "))Output
[1] "R is a programming language and software environment for statistical analysis, graphics representation and reporting. R was created by Ross Ihaka and Robert Gentleman at the University of Auckland, New Zealand, and is currently developed by the R Development Core Team. R is freely available under the GNU General Public License, and pre-compiled binary versions are provided for various operating systems like Linux, Windows and Mac. This programming language was named R, based on the first letter of first name of the two R authors (Robert Gentleman and Ross Ihaka),"
Example
word(x,start=11,end=90,sep=fixed(" "))Output
[1] "analysis, graphics representation and reporting. R was created by Ross Ihaka and Robert Gentleman at the University of Auckland, New Zealand, and is currently developed by the R Development Core Team. R is freely available under the GNU General Public License, and pre-compiled binary versions are provided for various operating systems like Linux, Windows and Mac. This programming language was named R, based on the first letter of first name of the two R authors (Robert Gentleman and Ross Ihaka),"
Example
word(x,start=21,end=90,sep=fixed(" "))Output
[1] "Ihaka and Robert Gentleman at the University of Auckland, New Zealand, and is currently developed by the R Development Core Team. R is freely available under the GNU General Public License, and pre-compiled binary versions are provided for various operating systems like Linux, Windows and Mac. This programming language was named R, based on the first letter of first name of the two R authors (Robert Gentleman and Ross Ihaka),"
Example
word(x,start=51,end=100,sep=fixed(" "))Output
[1] "License, and pre-compiled binary versions are provided for various operating systems like Linux, Windows and Mac. This programming language was named R, based on the first letter of first name of the two R authors (Robert Gentleman and Ross Ihaka), and partly a play on the name of the Bell"
Updated on: 10-Feb-2021
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