Standardizing Data Frame Variables in R (Example Code)

This article illustrates how to scale a data frame in R programming.

Creating Exemplifying Data

set.seed(111222333)                    # Setting seed
my_df <- data.frame(x = runif(500),    # Creating example data frame
                    y = runif(500),
                    z = runif(500))
head(my_df)                            # Head of example data frame
#           x         y          z
# 1 0.5465280 0.8041262 0.06875056
# 2 0.9357472 0.1261005 0.93677202
# 3 0.9421016 0.7632489 0.56510851
# 4 0.3691926 0.2581244 0.70402491
# 5 0.9699207 0.1104580 0.24193916
# 6 0.3050477 0.2424732 0.84682478

Example: Standardize Columns of Data Frame with scale Function

The following R code creates standardized data.

my_df_scale <- scale(my_df)            # Using scale function in R
head(my_df_scale)                      # Head of standardized data columns
#               x          y          z
# [1,]  0.1255981  1.0215973 -1.4502444
# [2,]  1.4478506 -1.2915632  1.6004818
# [3,]  1.4694376  0.8821397  0.2942427
# [4,] -0.4768445 -0.8411488  0.7824747
# [5,]  1.5639446 -1.3449295 -0.8415601
# [6,] -0.6947573 -0.8945447  1.2843555

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