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To calculate the percentage complete for a project with a list of tasks, you can use a simple formula based on the COUNTA function. Formula =COUNTA(range1)/COUNTA(range2) Explanation In the example shown, the formula in F6 is: =COUNTA(C5:C11)/COUNTA(B5:B11) How this formula works At the core, this formula simply divides tasks complete by the total task count:… read more »
To test a cell to see if contains certain words but not others, you can use an array formula based on the COUNT and SEARCH functions, wrapped in the AND function. Formula {=AND(COUNT(SEARCH(inc,A1))>0,COUNT(SEARCH(exc,A1))=0)} Explanation In the example shown, the formula in C5 is: {=AND(COUNT(SEARCH(inc,B5))>0,COUNT(SEARCH(exc,B5))=0)} This formula returns TRUE when B5 contains any of the words… read more »
To test if a cell (or any text string) contains a number, you can use the FIND function together with the COUNT function. In the generic form of the formula (above), A1 represents the cell you are testing. The numbers to be checked (numbers between 0-9) are supplied as an array. Formula =COUNT(FIND({0,1,2,3,4,5,6,7,8,9},A1))>0 Explanation In… read more »
Set criteria to accept specific characters only To use data validation to allow a list of specific characters only, you can use a rather complicated array formula based on the COUNT, MATCH, and LEN functions. Formula =COUNT(MATCH(MID(A1,ROW(INDIRECT(“1:”&LEN(A1))),1),allowed&””,0))=LEN(A1) Explanation In the example shown, data validation is applied with this formula: =COUNT(MATCH(MID(B5,ROW(INDIRECT(“1:”&LEN(B5))),1),allowed&””,0))=LEN(B5) where “allowed” is the named range D5:D11…. read more »
Reject data containing punctuation mark To use data validation to restrict punctuation, you can use a named range and a formula based on the FIND and COUNT functions. Formula =COUNT(FIND(xlist,A1))=0 Explanation In the example shown, the data validation applied to C5:C10 is: =COUNT(FIND(xlist,B5))=0 where xlist is the named range D5:D11. How this formula works Data validation rules… read more »
Excel functions such as SUM, COUNT, LARGE and MAX don’t work if a range includes errors. However, you can easily use the AGGREGATE function to fix this. 1. For example, Excel returns an error if you use the SUM function to sum a range with errors. 2. Use the AGGREGATE function to sum a range with errors. Explanation:… read more »
IF function and ISERROR function are used to check for an error in Excel. This example shows you how to create an array formula that counts the number of errors in a range. 1. We use the IF function and the ISERROR function to check for an error in the record below: Explanation: the IF function returns 1, if an… read more »