paste()

The paste() function concatenates strings with a separator specified by you.

# Example:
str1 <- "Hello"
str2 <- "World"
result <- paste(str1, str2, sep = " ")
print(result)  # Output: "Hello World"

[1] "Hello World"

Explanation:

• str1 and str2 are the strings to be concatenated.
• sep = " " specifies a space separator between the strings.

paste0()

The paste0() function works like paste() but without any separator by default.

# Example:
result <- paste0(str1, str2)
print(result)  # Output: "HelloWorld"

[1] "HelloWorld"

Explanation:

• paste0(str1, str2) concatenates str1 and str2 directly without any separator.

str_c()

The str_c() function is similar to paste() and paste0().

# Load the stringr package
library(stringr)

# Example:
result <- str_c(str1, str2, sep = " ")
print(result)  # Output: "Hello World"

[1] "Hello World"

Explanation:

• str_c(str1, str2, sep = " ") concatenates str1 and str2 with a space separator.

You can also concatenate multiple strings and set a different separator:

# Example:
str3 <- "!"
result <- str_c(str1, str2, str3, sep = "")
print(result)  # Output: "HelloWorld!"

[1] "HelloWorld!"

Explanation:

• str_c(str1, str2, str3, sep = "") concatenates str1, str2, and str3 directly without any separator.

stri_c()

The stri_c() function is quite similar to str_c() in stringr.

# Load the stringi package
library(stringi)

# Example:
result <- stri_c(str1, str2, sep = " ")
print(result)  # Output: "Hello World"

[1] "Hello World"

Explanation:

• stri_c(str1, str2, sep = " ") concatenates str1 and str2 with a space separator.

The stringi package also allows concatenating multiple strings with different separators:

# Example:
result <- stri_c(str1, "-", str2, "!", sep = "")
print(result)  # Output: "Hello-World!"

[1] "Hello-World!"

Explanation:

• stri_c(str1, "-", str2, "!", sep = "") concatenates str1, -, str2, and ! directly without any separator.

glue()

The glue() function simplifies string concatenation by using curly braces {} to embed R expressions.

# Load the glue package
library(glue)

# Example:
result <- glue("{str1} {str2}")
print(result)  # Output: "Hello World"

Hello World

Explanation:

• glue("{str1} {str2}") concatenates str1 and str2 with a space using curly braces for embedding.

You can also include other expressions within the string:

# Example:
result <- glue("{str1}-{str2}!")
print(result)  # Output: "Hello-World!"

Hello-World!

Explanation:

• glue("{str1}-{str2}!") concatenates str1, -, str2, and ! by embedding them within curly braces.