In my spreadsheet I have a column with negative and positive values. I need to get the minimum among all positive values and the maximum among all negative ones. How can I do so?
Use array formulas. In the following examples, the values you're checking are in A2:A10.
Maximum negative:
=MAX(IF(A2:A10<0,A2:A10))
Press Ctrl+Shift+Enter when entering the formula. Formula will then appear bracketed by {...}.
Minimum positive:
=MIN(IF(A2:A10>=0,A2:A10))
Also enter as an array formula by pressing Ctrl+Shift+Enter
来源：https://stackoverflow.com/questions/6666057/find-max-or-min-in-excel-with-conditions