Multiply Variable of Data Frame by Certain Value in R (Example Code)
On this page you’ll learn how to multiply the variable of a data frame by a particular number in the R programming language.
Creation of Example Data
data(iris) # Example data 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) # Example data 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: Multiply One Specific Variable of Data Frame by Certain Value
iris$Sepal.Length * 5 # Multiply column # [1] 25.5 24.5 23.5 23.0 25.0 27.0 23.0 25.0 22.0 24.5 27.0 24.0 24.0 21.5 29.0 # [16] 28.5 27.0 25.5 28.5 25.5 27.0 25.5 23.0 25.5 24.0 25.0 25.0 26.0 26.0 23.5 # [31] 24.0 27.0 26.0 27.5 24.5 25.0 27.5 24.5 22.0 25.5 25.0 22.5 22.0 25.0 25.5 # [46] 24.0 25.5 23.0 26.5 25.0 35.0 32.0 34.5 27.5 32.5 28.5 31.5 24.5 33.0 26.0 # [61] 25.0 29.5 30.0 30.5 28.0 33.5 28.0 29.0 31.0 28.0 29.5 30.5 31.5 30.5 32.0 # [76] 33.0 34.0 33.5 30.0 28.5 27.5 27.5 29.0 30.0 27.0 30.0 33.5 31.5 28.0 27.5 # [91] 27.5 30.5 29.0 25.0 28.0 28.5 28.5 31.0 25.5 28.5 31.5 29.0 35.5 31.5 32.5 # [106] 38.0 24.5 36.5 33.5 36.0 32.5 32.0 34.0 28.5 29.0 32.0 32.5 38.5 38.5 30.0 # [121] 34.5 28.0 38.5 31.5 33.5 36.0 31.0 30.5 32.0 36.0 37.0 39.5 32.0 31.5 30.5 # [136] 38.5 31.5 32.0 30.0 34.5 33.5 34.5 29.0 34.0 33.5 33.5 31.5 32.5 31.0 29.5 |
iris$Sepal.Length * 5 # Multiply column # [1] 25.5 24.5 23.5 23.0 25.0 27.0 23.0 25.0 22.0 24.5 27.0 24.0 24.0 21.5 29.0 # [16] 28.5 27.0 25.5 28.5 25.5 27.0 25.5 23.0 25.5 24.0 25.0 25.0 26.0 26.0 23.5 # [31] 24.0 27.0 26.0 27.5 24.5 25.0 27.5 24.5 22.0 25.5 25.0 22.5 22.0 25.0 25.5 # [46] 24.0 25.5 23.0 26.5 25.0 35.0 32.0 34.5 27.5 32.5 28.5 31.5 24.5 33.0 26.0 # [61] 25.0 29.5 30.0 30.5 28.0 33.5 28.0 29.0 31.0 28.0 29.5 30.5 31.5 30.5 32.0 # [76] 33.0 34.0 33.5 30.0 28.5 27.5 27.5 29.0 30.0 27.0 30.0 33.5 31.5 28.0 27.5 # [91] 27.5 30.5 29.0 25.0 28.0 28.5 28.5 31.0 25.5 28.5 31.5 29.0 35.5 31.5 32.5 # [106] 38.0 24.5 36.5 33.5 36.0 32.5 32.0 34.0 28.5 29.0 32.0 32.5 38.5 38.5 30.0 # [121] 34.5 28.0 38.5 31.5 33.5 36.0 31.0 30.5 32.0 36.0 37.0 39.5 32.0 31.5 30.5 # [136] 38.5 31.5 32.0 30.0 34.5 33.5 34.5 29.0 34.0 33.5 33.5 31.5 32.5 31.0 29.5