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# Excel/Excel-2007 macro for conditional adding

Question
QUESTION: Dear Sir,
I want to auto-number col L named JB Terminal using the formula \$L(N)=\$L(N-1) + \$I(N-1) starting from N=5 (Row number)

Name of worksheet: MasterList It already has a macro for Worksheet change event.

Conditions: Check for Col K. \$K5 takes values as a result of concatenation of answers to two questions in the Msg box.
Q1: Enter Junction Box Type: JB_A1 / JB_A2 / JB_B1 / JB_B2
Q2: Enter Junction Box No: Any numerical value, like 2, 32, 741 etc (max 999)
So, \$K5 = 1JB_A1 or 32JB_A1 or 76JB_A2 or 872JB_B2 etc.

CONDITION 1:
If the value found in \$K5 is new (not found earlier in the col), then \$L5 = 1. for ex: If
K5 = 1JB_A1 then L5 =1
K45 = 2JB_A1 then L45 =1
K111 = 3JB_A1 then L111=1 (Note that 3JB_A1 <> 1JB_A1)
K137 = 1JB_A2 then L137=1 (Note that 1JB_A1 <> 1JB_A2)
K147 = 3JB_A2 then L147=1

If the value found in \$K6 is not new, \$K6= \$I5 + \$K5 for example, let us consider the above values again as below:
(Note that \$I5 will be either 2 or 3 or 4 selected by DD list, In all examples below I have considered \$I5 =2)

K5 = 1JB_A1 then L5 =1
K6 = 1JB_A1 then L6 =3
K7 = 1JB_A1 then L7 =5
K8 = 1JB_A1 then L8 =7
K9 = 1JB_A1 then L9 =9
K10 = 1JB_A1 then L10 =11
K11 = 1JB_A1 then L11 =13 etc

similarly,
K45 = 2JB_A1 then L45 =1
K46= 2JB_A1 then L46 =3
k47 = 2JB_A1 then L47 =5
k48= 2JB_A1 then L48 =7

and so forth.

CONDITION 2: for maximum value in \$L6
The idea is to restrict the added value in L in accordance to which type of Junction Box is used
For type JB_A1, maximum value of addition is 18
For type JB_A2, maximum value of addition is 30
For type JB_B1, maximum value of addition is 24
For type JB_B2, maximum value of addition is 40

Procedure: If the count value exceed 18, and if the type of Junction is 'xJB_A1' (regardless of any value of x (x=enter junction box number) then
SUB1: MSG Box Max Terminals for the selected type of Junction Box is exceeding it's Limits. Please select a different type of Junction Box or Please select a new number of junction box. On clicking OK, the active cellwill be the cell where the new type / number is selected. ie, cell K.
If the count value exceed 18, and if the type of Junction is NOT 'xJB_A1' then continue the addition till the count exceeds 30. Again,
If the count value exceed 30, and if the type of Junction is 'xJB_A2' (regardless of any value of x (x=enter junction box number) then Go to SUB1.
continue this till addition exceeds 40.

Best regards
Vilas Desai

ANSWER: To create a MACRO that does all this would probably require some compensation of some sort.  That's a tall order.

You can accomplish most of what you've depicted using FORMULAS.

To get your first condition, try this in L5, then copied down...we're not done.

=MAX(COUNTIF(\$K\$1:\$K5,\$K5)*2-1, 0)

Now, to limit that to 18, we add this:

=MIN(MAX(COUNTIF(\$K\$1:\$K5,\$K5)*2-1, 0),18)

Now, to make the 18 variable, we check the last two letters of K5.  This formula does that:

=MATCH(RIGHT(K5,2), {"A1","A2","B1","B2"}, 0)

To convert that into the limits, we add this to that formula:

=CHOOSE(MATCH(RIGHT(K5,2), {"A1","A2","B1","B2"}, 0), 18, 30, 24, 40)

Now we merge that back into original formula in place of the 18:

=MIN(MAX(COUNTIF(\$K\$1:\$K5,\$K5)*2-1, 0), CHOOSE(MATCH(RIGHT(K5,2), {"A1","A2","B1","B2"}, 0), 18, 30, 24, 40))

Lastly, I would recommend some Conditional Formatting in column L to simply detect these even numbers.  Since the formula only creates ODD numbers and the MAX values are even, a simple =ISEVEN() test to color any cell with an even number to draw attention to it.

---------- FOLLOW-UP ----------

QUESTION: Dear Jerry
Than you so much for your efforts. As you mentioned, the formula does almost everything that was need. I tested your formula, and works perfect but with these points missing.
1. It does not check Value of \$I5. I inserted \$I5 in place of '2' in the formula and observed it works good only if \$I5=2 not if \$I5= 3 or 4
2. On reaching the max  value, it does not prompt the user that the count (in Col L) exceeds max value and to  either enter a new  Junction Box type (Q1 as above) or enter a new junction box no.(Q2 as above)When the user chooses a new Junction box type or number, the col L value should start from 1 and increase withe formula \$L(n) = \$I(n-1) + \$L(n-1)

I greatly appreciate your help in coming so far, but he above corrections will be extremely useful.

Thanks and best regards
Vilas Desai

ANSWER: 1) The meaning and impact of I5 is not clear and was thus not included in the formula suggestion.   The meaning an impact of I5 is still not clear.

2) I addressed the "alert" issue in my original formula.  I suggested applying an ISEVEN Conditional Formatting on column L to highlight cells that have reached their maximum, and any further duplicates would also be highlighted, easy enough to spot when it occurs.

Picture:  http://screencast.com/t/kwOebhRt

---------- FOLLOW-UP ----------

QUESTION: Dear Sir,
Thanks again. \$I5 decides the number that is added to \$L5 to give \$L6. The possible options of \$I5 are 2/3/4 selectable by drop down list. Initially, the Value of L5 must be 1 because the value in K5 is not found any where else in col K.
In your formula, I tried replacing '*2' with '*\$I5" but the problem is if I5= 3 or 4  then  L5 does not start with 1 It will start with 2 or 3 . In your formula, you have considered \$L5 as a fixed value of 2 but it is any value between 2, 3 or 4.
Therefore, with I as 2/3/4, L can take even values also.
I understand your idea of finding duplicates which I think I can do.
Best regards
Vilas Desai

So if I5 is 4, L5 is still 1 due to the start of the list.
If the next instance of K5 doesn't occur until K10, then the value of L10 is I5+L5?
Then if it doesn't occur again until K50, the value in L50 would be I10+L10?

I'll see what I can do.   If the values going down column A can be even numbers before we get to the MAX, the CF formula trick I suggested won't work that simply.  I was suggesting looking for any EVEN number and coloring it.  I'll think about it.
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#### Jerry Beaucaire

##### Expertise

Excel Formulas, macros, automation. Microsoft Excel MVP - 2010. Code site with free code snippets and techniques: http://sites.madrocketscientist.com/jerrybeaucaires-excelassistant/files

##### Experience

Microsoft Excel MVP - 2010. I have my own extensive Excel help/code site: http://sites.madrocketscientist.com/jerrybeaucaires-excelassistant/files ===================== I have been offering free assistance as an Excel aid on many web sites for many years: (http://www.excelforum.com - JBeaucaire) ======== (http://www.askmehelpdesk.com/spreadsheets - JBeaucaire) ======= (http://www.mrexcel.com/forum - jbeaucaire)

Education/Credentials
Bachelor's Degree from Azusa Pacific University in Mathematics and Music Composition

Awards and Honors
Microsoft Excel MVP 2010