Assign a number each letter on list compounding occurence @ each e

[Nat Maxwell]

hi all,
What should be the syntax if I have a list of first letters of my entries
(looking something like
A
A
B
C
C
C
C
E
J
P
P
P
S
S
T
V

and I wanted to programmatically assign a number to each entry on this list,
restaring the numbering at each letter (e.g., first A would appear as A1,
second as A2, first C as C1, fifth C as C5, etc.)? I know how to compile the
resulting letter with its corresponding numeral, I'm just not sure how/if to
use the MATCH function to count the compounding occurence of each letter on
the list.
Thank you in advance!

 

[Ron Rosenfeld]

hi all,
What should be the syntax if I have a list of first letters of my entries
(looking something like
A
A
B
C
C
C
C
E
J
P
P
P
S
S
T
V

and I wanted to programmatically assign a number to each entry on this list,
restaring the numbering at each letter (e.g., first A would appear as A1,
second as A2, first C as C1, fifth C as C5, etc.)? I know how to compile the
resulting letter with its corresponding numeral, I'm just not sure how/if to
use the MATCH function to count the compounding occurence of each letter on
the list.
Thank you in advance!

If your first entry is in cell A1, then:

B1: =COUNTIF($A$1:A1,A1)

and copy/drag down as far as required.

This should give you the count you are looking for
--ron

 

[Gary''s Student]

In B1 enter:
1
In B2 enter:
=IF(A2=A1,B1+1,1)
and copy down

 

[Teethless mama]

Assuming your data in Sheet1
Create a name range. Example: ALPHA

In Sheet2
In A1:
=IF(ISERR(SMALL(IF(ALPHA="A",ROW(INDIRECT("1:"&ROWS(ALPHA)))),ROWS($1:1))),"",INDEX(ALPHA,SMALL(IF(ALPHA="A",ROW(INDIRECT("1:"&ROWS(ALPHA)))),ROWS($1:1))))

Copy across, all you have to change a letter "A" on the second column to
"B" and so on...
then copy down

 

[Nat Maxwell]

Thank you all very much! Will try out all three methods.
Have a wonderful day!