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Thủ Thuật Hướng dẫn Multilevel list numbering in Excel Mới Nhất
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Basic outline numbering
Summary
To generate basic outline numbering you can use a formula based several Excel functions, including COUNTA, IF, MID, FIND, and LEN. In the example shown, the formula in D5 is:
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=COUNTA($B$5:B5)&”.”&IF(B5″”,1,MID(D4,FIND(“.”,D4)+1,LEN(D4))+1)
Note: this formula will only handle a 2-level outline.
Explanation
At the core, this formula builds a level 1 and level 2 number and concatenates the two numbers together with a period (“.”) as a separator. The result is a value like “1.1”. The “level 1” number is generated with COUNTA like this:
=COUNTA($B$5:B5)
Note the range is an expanding reference, so it will expand as it is copied down the column.
The “level 2” number is generated with this code:
IF(B5″”,1,MID(D4,FIND(“.”,D4)+1,LEN(D4))+1)
Here, the IF function is used to check the contents of B5. If B5 is not blank, it means we have a new level 1 heading and IF returns 1. In other words, every time we have a new level 1 entry, we restart level 2 numbering 1.
If the B5 *is* blank we need to increment the level 2 number using the value in the cell above. This is a bit tricky, because the outline number is a text string, not a number. That means we need to extract the value with a text function before we can increment. To do this, we use the MID function to extract all text to the right of the period (“.”), which we locate with the FIND function:
MID(D4,FIND(“.”,D4)+1,LEN(D4))+1
The LEN function is used as a simple way to guarantee all characters after the period are extracted. Notice we then add 1 directly to the result, which is still text. This math operation causes Excel to coerce the text to a number, so the result is an incremented number. Finally, the level 1 and level 2 numbers are concatenated together with a period (“.”) as a separator.
AuthorDave BrunsRelated formulasSequential row numbersWhen not given a reference, the ROW function returns the row number of the current row. In cell B5, ROW returns 5, in cell B6, ROW() returns 6, and so on: = ROW () // returns 5 in B5 = ROW () // returns 6 in B6 So, to create sequential row numbers…Related functionsExcel COUNTA Function
The Excel COUNTA function returns the count of cells that contain numbers, text, logical values, error values, and empty text (“”). COUNTA does not count empty cells.
Excel MID Function
The Excel MID function extracts a given number of characters from the middle of a supplied text string. For example, =MID(“apple”,2,3) returns “ppl”.
Excel FIND Function
The Excel FIND function returns the position (as a number) of one text string inside another. When the text is not found, FIND returns a #VALUE error.
Excel LEN Function
The Excel LEN function returns the length of a given text string as the number of characters. LEN will also count characters in numbers, but number formatting is not included.
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