1
I have a string lenght 15 and want to remove the first 70 charac. and the last 200 charac. each.
I tried the following code to remove the beginnings and it didn’t work:
texto2009a <- texto2009 %>% map(str_sub(., 1, 72) <- " ")
1
I have a string lenght 15 and want to remove the first 70 charac. and the last 200 charac. each.
I tried the following code to remove the beginnings and it didn’t work:
texto2009a <- texto2009 %>% map(str_sub(., 1, 72) <- " ")
5
Fictional example, which may be reproduced for your case:
x<-c('Bem-vinda ao Stack Overflow em Português')
library(stringr)
str_sub(x, 2, -10) # as aspas do texto também contam como strings. Por isso, adicione uma unidade a mais
#[1] "em-vinda ao Stack Overflow em "
Where, 2
and -10
are respectively the amounts of initial and final characters that you want to remove.
5
From the @Giovani response, I wrote a small function to solve the difference problem between what str_sub
does and what the question asks.
On the page help("str_sub")
, section Details
:
Details
Substrings are inclusive - they include the characters at Both start and end positions. str_sub(string, 1, -1) will Return the complete substring, from the first Character to the last.
Now the question asks (edited by me)
remove the first
m
characters and the lattern
characters
It is therefore necessary to start at m + 1
and in the end it will be n - 1
.
library(stringr)
str_sub_als <- function(s, primeiros = 70, ultimos = -200){
str_sub(s, primeiros + 1, ultimos - 1)
}
x <- c("1234567890", "abcdefghijklmnopqrstuvwxyz")
str_sub(x, 3, -4)
#[1] "34567" "cdefghijklmnopqrstuvw"
str_sub_als(x, 3, -4)
#[1] "456" "defghijklmnopqrstuv"
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Welcome to Stackoverflow! Unfortunately, this question cannot be reproduced by anyone trying to answer it. Please, take a look at this link and see how to ask a reproducible question in R. So, people who wish to help you will be able to do this in the best possible way.
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