Highlight cells if column contains a given number X times

Question

I have a large Excel spreadsheet with a column that has an identifying number. Each unique number will occur at least 12 times. I would like to highlight those numbers that appear more than 12 times. Is there a way to do this non-programmatically?

Answer 1

Use Conditional Formatting:

=COUNTIF(INDIRECT(ADDRESS(1,COLUMN())&":"&  
         ADDRESS(65536,COLUMN())),INDIRECT(ADDRESS(ROW(), COLUMN())))>=12

Select the entire sheet, then choose Conditional Formatting. Apply this formula, and pick the formatting you'd like. It will work for any cell, in any column.

Answer 2

Suppose in column A you have all your numbers. Then to highlight values that occur more than 12 times do as follows:

1. Format > Conditional Formatting...
2. In first dropdown select Formula Is
3. In the adjacent box type =COUNTIF(A:A, A1) > 12
4. Now select the desired color to highlight

Does this help?