Working with missing and duplicate data1

Screen Link:

My Code:

what does the "transform("first") mean?

we transform the region column accotding to the first row???

THanks a lot in advance.



Are you sure you included the correct link in your post? Because there is no mention of "transform("first") in the link you include.

Yes, the link is correct. I wanted to know the function of the transform(first)

It is screen 7 in working with missing and duplicate data

As I said, there is no transform(first) mentioned on that screen.

Can you share the screenshot of the content that refers to transform(first)?