课程: Introduction to Spark SQL and DataFrames

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Working with NA values in DataFrames

Working with NA values in DataFrames

课程: Introduction to Spark SQL and DataFrames

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Working with NA values in DataFrames

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- [Instructor] It's not uncommon to have data missing from datasets, now when we work with Sequel, we're used to working with nulls and working around nulls. When we work with data frames, the absence of data is indicated by an NA So in this lesson, we're going to look at how we can work with NAs and nulls using data frames and Spark Sequel. So as I've done before, I've started with some data already loaded, so let's review what I have done already. In this Jupyter Notebook, I have a number of import statements, so I'm importing the Row function which we used in the previous video, to create a local data frame, and then I also have Spark Session which allows us to work with Spark Sequel Now I'm also importing a couple of things we haven't seen before, I'm importing a function called lit which allows us to create a literal column for a data frame, and I'm also importing a data type called String Type which we'll use a…

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