Create New Empty Variable in Data Frame in R (2 Examples)
In this tutorial, I’ll demonstrate how to create a new empty variable in a data frame in R.
Constructing Example Data
data(iris) # Load iris data set head(iris) # Sepal.Length Sepal.Width Petal.Length Petal.Width Species # 1 5.1 3.5 1.4 0.2 setosa # 2 4.9 3.0 1.4 0.2 setosa # 3 4.7 3.2 1.3 0.2 setosa # 4 4.6 3.1 1.5 0.2 setosa # 5 5.0 3.6 1.4 0.2 setosa # 6 5.4 3.9 1.7 0.4 setosa |
data(iris) # Load iris data set head(iris) # Sepal.Length Sepal.Width Petal.Length Petal.Width Species # 1 5.1 3.5 1.4 0.2 setosa # 2 4.9 3.0 1.4 0.2 setosa # 3 4.7 3.2 1.3 0.2 setosa # 4 4.6 3.1 1.5 0.2 setosa # 5 5.0 3.6 1.4 0.2 setosa # 6 5.4 3.9 1.7 0.4 setosa
Example 1: Creating A New Variable with NA Values
iris$empty_1 <- NA # New NA column head(iris) # Sepal.Length Sepal.Width Petal.Length Petal.Width Species empty_1 # 1 5.1 3.5 1.4 0.2 setosa NA # 2 4.9 3.0 1.4 0.2 setosa NA # 3 4.7 3.2 1.3 0.2 setosa NA # 4 4.6 3.1 1.5 0.2 setosa NA # 5 5.0 3.6 1.4 0.2 setosa NA # 6 5.4 3.9 1.7 0.4 setosa NA |
iris$empty_1 <- NA # New NA column head(iris) # Sepal.Length Sepal.Width Petal.Length Petal.Width Species empty_1 # 1 5.1 3.5 1.4 0.2 setosa NA # 2 4.9 3.0 1.4 0.2 setosa NA # 3 4.7 3.2 1.3 0.2 setosa NA # 4 4.6 3.1 1.5 0.2 setosa NA # 5 5.0 3.6 1.4 0.2 setosa NA # 6 5.4 3.9 1.7 0.4 setosa NA
Example 2: Creating A New Variable with Empty Character strings
data$empty_2 <- "" # New empty character column head(iris) # Sepal.Length Sepal.Width Petal.Length Petal.Width Species empty_1 empty_2 # 1 5.1 3.5 1.4 0.2 setosa NA # 2 4.9 3.0 1.4 0.2 setosa NA # 3 4.7 3.2 1.3 0.2 setosa NA # 4 4.6 3.1 1.5 0.2 setosa NA # 5 5.0 3.6 1.4 0.2 setosa NA # 6 5.4 3.9 1.7 0.4 setosa NA |
data$empty_2 <- "" # New empty character column head(iris) # Sepal.Length Sepal.Width Petal.Length Petal.Width Species empty_1 empty_2 # 1 5.1 3.5 1.4 0.2 setosa NA # 2 4.9 3.0 1.4 0.2 setosa NA # 3 4.7 3.2 1.3 0.2 setosa NA # 4 4.6 3.1 1.5 0.2 setosa NA # 5 5.0 3.6 1.4 0.2 setosa NA # 6 5.4 3.9 1.7 0.4 setosa NA
Further Resources & Related Articles
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