Select numeric columns from a Data frame in R

We can get the list of columns in a data frame using sapply function.

In this article, we are going extract the numeric columns of diamonds dataset.

1. Diamonds data frame contains numeric and noon-numeric columns.

head(diamonds)

carat cut color clarity depth table price x y z 1 0.23 Ideal E SI2 61.5 55 326 3.95 3.98 2.43 2 0.21 Premium E SI1 59.8 61 326 3.89 3.84 2.31 3 0.23 Good E VS1 56.9 65 327 4.05 4.07 2.31 4 0.29 Premium I VS2 62.4 58 334 4.20 4.23 2.63 5 0.31 Good J SI2 63.3 58 335 4.34 4.35 2.75 6 0.24 Very Good J VVS2 62.8 57 336 3.94 3.96 2.48

2. If we want to get only
numerics< -sapply(diamonds,is.numeric) #This checks the only numeric columns)

3. To get the numeric columns of data frame diamonds.

names(diamonds[,numerics])

[1] "carat" "depth" "table" "price" "x" "y" "z"

4. Print the only numeric columns of data frame.

print(head(diamonds[,numerics]))

carat depth table price x y z 1 0.23 61.5 55 326 3.95 3.98 2.43 2 0.21 59.8 61 326 3.89 3.84 2.31 3 0.23 56.9 65 327 4.05 4.07 2.31 4 0.29 62.4 58 334 4.20 4.23 2.63 5 0.31 63.3 58 335 4.34 4.35 2.75 6 0.24 62.8 57 336 3.94 3.96 2.48

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