try
- formula start in B2
- your data has header (A1) or start in A2
- range $A$2:$A$20 should be bigger than existing data in col. A
- formula should be entered by Control+Shift+Enter
- drag formula down as far as you need.
Hint:
- You can change range $A$2:$A$20 to Name (Name Manager) and it will be easier to use
- change range $A$2:$A$20 suitably to your need
- after all change range of your original data to the Excel Table*** (in column A) and do the same with data in column B independently.
Hope it will help
***Excel Table: Select data in column==>Menu: Insert==>Table
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