Google 表格减去连续列 Arrayformula ISBLANK

Question

I'm trying to subtract consecutive columns of dates with arrayformula

 07May2020 08Jun2020 09Jul2020 10Aug2020 11Sep2020
 10Oct2020 11Nov2020 21Dec2020
 10May2020 15Jul2020 18Aug2020 21Sep2020

I used this formula

=arrayformula(if(isblank(F2:G),"",G2:G-F2:F))

This resulted in two columns of same result on every output. How to combine all columns with arrayformula?

Sheet is here

Answer 1

You can extend the arrayformula to check if the column with the later date is empty, then apply the subtraction to the arrays:

=arrayformula(if(isblank(B1:F),"",B1:F-A1:E))

In your sample spreadsheet:

Reference: ARRAYFORMULA