r - Extract the first (or last) n characters of a string - Stack Overflow
Apr 9, 2013 · I want to extract the first (or last) n characters of a string. This would be the equivalent to Excel's LEFT() and RIGHT().
r - Replace specific characters within strings - Stack Overflow
This solution quickly presents both options, which is why I offered it. My hope was to help other users filter through much like I had to do when I was new to R. I struggled with gsub before finding stringr because it wasn't mentioned in a highly upvoted answer. Again, the objective is not to collect upvotes but try to help new R users out. –
r - Test if characters are in a string - Stack Overflow
A regex is a way to match a string (if this definition irritates you, let it go). For example, the regex a matches the character "a", the regex a* matches the character "a" 0 or more times, and the regex a+ would match the character "a" 1 or more times. Hence in the example above, the needle we are searching for 1+2, when treated as a regex ...
Creating a sequential list of letters with R - Stack Overflow
I would like to be able to create a sequence of letters in R (to assist in importing data from a SPSS file) It's quite easy to create a sequence of numbers, for ...
Extracting the last n characters from a string in R
Feb 2, 2015 · > text<-"some text in a string" # we want to have only the last word "string" with 6 letter > n<-5 #as the last character will be counted with nchar(), here we discount 1 > substr(x=text,start=nchar(text)-n,stop=nchar(text)) This will bring the last characters as desired.
r - Convert letters to numbers - Stack Overflow
May 15, 2016 · Here's a short test: The function calculates the utf8 code of the letter that it is passed to, subtracts from this value the utf8 code of the letter "a" and adds to this value the number one to ensure that R's indexing convention is observed, according to which the numbering of the letters starts at 1, and not at 0.
r - Convert from lowercase to uppercase all values in all character ...
May 13, 2013 · In addition to named functions, this also supports a purrr-style lambda function/formula syntax: ~ toupper(.x) or an anonymous function function(x) toupper(x) (or short hand in R > 4.1.0 \(x) toupper(x)) that make setting additional function arguments easy and clear. purrr. Alternatively, you can use the modify_* functions from the purrr package:
r - Automatically adding letters of significance to a ggplot barplot ...
Sep 24, 2021 · This chapter on using the compact letter display may be of interest to you. Note that it especially goes into why I put the caption below the ggplot. Furthermore, I believe that jared_mamrot changed one important thing compared to what you asked for.
r - split character data into numbers and letters - Stack Overflow
The above pattern will match (but not consume) when either the previous character is a letter and the following character is a number, or vice-versa. Note that we use strsplit in Perl mode to access lookarounds.
r - Getting and removing the first character of a string - Stack …
5. removing first characters: x <- 'hello stackoverflow'. substring(x, 2, nchar(x)) Idea is select all characters starting from 2 to number of characters in x. This is important when you have unequal number of characters in word or phrase. Selecting the first letter is trivial as previous answers: