I am working on a New Vendor by Year analysis dashboard and need to make a formula based off of a matrix visual. I am trying to determine new vendors if in the previous year, the vendor has no value. For example in the picture I uploaded, the second row will be a new vendor because they have no value in 2017 but they do in 2018. Because I used the Year column as my headers, I cannot “call” it in a measure or calculated column. Any advice? Thank you so much!