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How to abbreviate names or words in Excel

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To abbreviate text that contains capital letters, you can try this array formula based on the TEXTJOIN function, which is new in Excel 2016. You can use this approach to create initials from names, or to create acronyms. Only capital letters will survive this formula, so the source text must include capitalized words. You can use the PROPER function to capitalize words if needed. See example below;

Worked Example:   Excel Data validation must contain specific text

 Formula

=TEXTJOIN("",1,IF(ISNUMBER(MATCH(CODE(MID(A1,ROW(INDIRECT("1:"&LEN(A1))),1)),ROW(INDIRECT("63:90")),0)),MID(A1,ROW(INDIRECT("1:"&LEN(A1))),1),""))

Explanation

In the example shown, the formula in C5 is:

=TEXTJOIN("",1,IF(ISNUMBER(MATCH(CODE(MID(B5,ROW(INDIRECT("1:"&LEN(B5))),1)),ROW(INDIRECT("63:90")),0)),MID(B5,ROW(INDIRECT("1:"&LEN(B5))),1),""))

How this formula works

Working from the inside out, the MID function is used to cast the string into an array of individual letters:

MID(B5,ROW(INDIRECT("1:"&LEN(B5))),1)

In this part of the formula, MID, ROW, INDIRECT, and LEN are used to convert a string to an array or letters, as described here.

MID returns an array of all characters in the text.

Worked Example:   Get first name from name with comma -- Manipulating NAMES in Excel

{“W”;”i”;”l”;”l”;”i”;”a”;”m”;” “;”S”;”h”;”a”;”k”;”e”;”s”;”p”;”e”;”a”;”r”;”e”}

This array is fed into the CODE function, which outputs an array of numeric ascii codes, one for each letter.

Separately, ROW and INDIRECT are used to create another numeric array:

ROW(INDIRECT("63:90")

This is the clever bit. The numbers 63 to 90 correspond to the ascii codes for all capital letters between A-Z.  This array goes into the MATCH function as the lookup array, and the original array of ascii codes is provided as the lookup value.

Worked Example:   Get cell content at given row and column in Excel

MATCH then returns either a number (based on a position) or the #N/A error. Numbers represent capital letters, so the ISNUMBER function is used together with the IF function to filter results. Only characters whose ascii code is between 63 and 90 will make into the final array, which is then reassembled with the TEXTJOIN function to create the final abbreviation or acronym.

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