How to do it...

This section walks through the steps to convert the dataframe into an array:

1. View the data collected from the dataframe using the following script:

df.select("height", "weight", "gender").collect()

2. Store the values from the collection into an array called data_array using the following script:

data_array =  np.array(df.select("height", "weight", "gender").collect())

3. Execute the following script to access the first row of the array:

data_array[0]

4. Similarly, execute the following script to access the final row of the array:

data_array[28]