What is pivot? How do I pivot? Long format to wide format? I’ve seen a lot of questions that ask about pivot tables, even if they don’t know it. It is virtually impossible to write a canonical question and answer that encompasses all aspects of pivoting… But I’m going to give it a go. The problem with existing questions and
Tag: pivot
NaN values in pivot_table index causes loss of data
Here is a simple DataFrame: Pivot method 1 The data can be pivoted to this: Downside: data in the 2nd row is lost because df[‘b’][1] == None. Pivot method 2 Downside: column b is lost. How can the two methods be combined so that columns b and the 2nd row are kept like so: More generally: How can information from