Learn R – 5 Techniques to Create Empty Data Frames with Column Names

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This article represents techniques on how one could create an empty data frame with column names. Please feel free to comment/suggest if I missed to mention one or more important points. Also, sorry for the typos.
5 Techniques to Create Empty Data Frames

In each of the examples below, the data frame is created with three columns, namely, ‘name’, ‘rating’, ‘relyear’. It represents moview names, ratings, and the release year.

# Command data.frame is used
df1 <- data.frame(name="", rating="", relyear="", stringsAsFactors=FALSE)
# Command data.frame is used
df2 <- data.frame(name=character(), rating=character(), relyear=character(), stringsAsFactors=FALSE)
# Usage of read.table command to create empty data frame
df3 <- read.table(text = "",
           colClasses = c("character", "character", "character"),
           col.names = c("name", "rating", "relyear"))

# Usage of read.csv command to create empty data frame
df4 <- read.csv(text="name, rating, relyear")
# Command data.frame is used
df5 = data.frame(matrix(vector(), 0, 3, dimnames=list(c(), c("name", "rating", "relyear"))), stringsAsFactors=FALSE)

You could test the above by assigning a row to the created data frame. Following is the related code sample to assign a row to the empty data frame.

	df1[1,] <- c("Furious 7", "5", "2015")

 

Ajitesh Kumar

Ajitesh Kumar

Ajitesh has been recently working in the area of AI and machine learning. Currently, his research area includes Safe & Quality AI. In addition, he is also passionate about various different technologies including programming languages such as Java/JEE, Javascript and technologies such as Blockchain, mobile computing, cloud-native technologies, application security, cloud computing platforms, big data etc.

He has also authored the book, Building Web Apps with Spring 5 and Angular.
Ajitesh Kumar

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