Create empty DataFrame with only column names in R

Last Updated : 21 Dec, 2023

In this article, we are going to discuss how to create a data frame in r with column names and create an empty data frame with column names in the R Programming Language.

The basic syntax for creating a data frame is using data. frame().

Create a Data Frame with Values and column Names

# Define the data
id <- c(1, 2, 3)
names <- c("Vipul", "Jayesh", "Shivang")
address <- c("123 Main St", "456 Oak St", "789 Pine St")
phone <- c("555-1111", "555-2222", "555-3333")
aadhaar_no <- c("123-456-789", "456-789-123", "789-123-456")

# Combine vectors into a data frame
myData <- data.frame(
  ID = id,
  Names = names,
  Address = address,
  Phone = phone,
  `Aadhaar No` = aadhaar_no
)

# Display the data frame
print(myData)

Output:

  ID   Names     Address    Phone  Aadhaar.No
1  1   Vipul 123 Main St 555-1111 123-456-789
2  2  Jayesh  456 Oak St 555-2222 456-789-123
3  3 Shivang 789 Pine St 555-3333 789-123-456

Create Data Frame with Column Names from Matrix

# Create a matrix
Matrix <- matrix(1:12, nrow = 4, ncol = 3)

# Define column names
col_names <- c("ID", "Names", "Scores")

# Convert the matrix to a data frame with column names
myData <- data.frame(matrix = Matrix)
colnames(myData) <- col_names

# Display the data frame
print(myData)

Output:

  ID Names Scores
1  1     5      9
2  2     6     10
3  3     7     11
4  4     8     12

Create empty DataFrame with only column names in R

Syntax: data.frame(input_data,nrow,ncol)

Parameter:

input_data may be values of list or vector.
nrow specifies the number of rows
ncol specifies the number of columns.

Steps -

Create an empty dataframe
Define the column names to a variable
Assign that variable to the dataframe.
Display data frame so created

We can assign column names to dataframe by using colnames()

Syntax:

colnames(dataframe_name)

Given below is the implementation using the above approach.

# created vector with 5 characters
columns= c("id","names","address","phone","aadhaar no") 

# pass this vector length to ncol parameter
# and nrow with 0
myData = data.frame(matrix(nrow = 0, ncol = length(columns))) 

# assign column names
colnames(myData) = columns

# display
print(myData)

Output:

[1] id         names      address    phone      aadhaar no
<0 rows> (or 0-length row.names)

If we specify nrow parameter with morethan 0, it will take NA as that many rows.

# created vector with 5 characters
columns= c("id","names","address","phone","aadhaar no") 

# pass this vector length to ncol parameter 
# and nrow with 1
myData = data.frame(matrix(nrow=1, ncol = length(columns))) 

# assign column names
colnames(myData) = columns

# display
print(myData)

# pass this vector length to ncol parameter and 
# nrow with 6
myData = data.frame(matrix(nrow=6, ncol = length(columns))) 

# assign column names
colnames(myData) = columns

# display
print(myData)

Output:

  id names address phone aadhaar no
1 NA    NA      NA    NA         NA
2 NA    NA      NA    NA         NA
3 NA    NA      NA    NA         NA
4 NA    NA      NA    NA         NA
5 NA    NA      NA    NA         NA
6 NA    NA      NA    NA         NA

How to create an empty DataFrame in R ?

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Article Tags :

Create empty DataFrame with only column names in R

Create a Data Frame with Values and column Names

Create Data Frame with Column Names from Matrix

Create empty DataFrame with only column names in R

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