The length of a vector means the total number of elements present in a given vector.
In R, we can use the length()
function to find the total number of elements present in a vector.
Example: Length of a Vector in R Using length()
# create a vectorlanguages <- c("R", "Swift", "Java", "Python")# find length of languages vectorlength(languages) # 4# create another vectornumbers <- c(1,5,7,9,12,54)# find length of numbers vectorlength(numbers) # 6
Output
[1] 4[1] 6
In the above example, we have used the length()
function to find the length of the vector named languages and numbers respectively.
Since
- languages contain 4 elements, the function 4.
- numbers contain 6 elements, the function 6.
Example 2: Length of a String in R Using str_length()
In order to use the str_length()
function, we first import the stringr
package.
# import stringr packagelibrary(stringr)string1 <- "Programiz"# use str_length() of stringr package to find lengthresult <- str_length(string1)cat("Total length:", result)
Output
Total length: 9
Here, we have used the str_length()
function provided by the stringr
package to find the length of string1.
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Now, let's delve into the concepts discussed in the provided article:
-
Vector Length in R: The article starts by discussing the concept of the length of a vector in R. A vector is a fundamental data structure in R, and its length refers to the total number of elements it contains. The
length()
function in R is employed to determine this count. The example provides a clear demonstration of creating vectors (e.g.,languages
andnumbers
) and using thelength()
function to find the number of elements in each. -
Vector Length Example: The article includes examples illustrating the application of the
length()
function on two vectors (languages
andnumbers
). The code snippets showcase how to create vectors and subsequently use thelength()
function to obtain the count of elements. For instance:# create a vector languages <- c("R", "Swift", "Java", "Python") # find length of languages vector length(languages) # 4
-
String Length in R Using
str_length()
: The article extends the discussion to finding the length of a string in R using thestr_length()
function, which is part of thestringr
package. It emphasizes importing the package before using the function. The example involves creating a string (string1
) and usingstr_length()
to determine its length. Here's a snippet:# import stringr package library(stringr) string1 <- "Programiz" # use str_length() of stringr package to find length result <- str_length(string1) cat("Total length:", result) # Output: Total length: 9
-
Explanation of Example 2: The article provides an explanation of the second example, clarifying that the
str_length()
function from thestringr
package is employed to find the length of the string (string1
). The result is then printed usingcat()
.
In summary, the article covers fundamental concepts related to vector length in R, showcasing practical examples using the length()
function for vectors and the str_length()
function for strings in the stringr
package.