Converting mothly data to daily data

Posted on 2011-03-14
Last Modified: 2012-05-11
This is a slightly different question to the one answered by Teylyn a little while ago.

In column A are daily dates in format yyyymmdd.  In column L are monthly dates in format Jan-90.  In columns N-R are numbers (1 or 0) relating to each monthly date.  I want to create a column of numbers (in say, columns C-G) for each day that match the respective number in columns N-R for the given month.  So for example, all of the daily numbers in column C for the month of January 1990 in column A would be the same as the number for Jan-90 in column N.  

I have attached a spreadsheet as an example. Sample.xlsx
Question by:pwflexner
  • 4
LVL 50

Expert Comment

by:Ingeborg Hawighorst
ID: 35133436

In C8, copy across and down:


Adjust the bold parts to reflect the extent of your month lookup table.

cheers, teylyn
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Accepted Solution

Ingeborg Hawighorst earned 125 total points
ID: 35133469
Or with Vlookup



Expert Comment

ID: 35133491
In B8 write this formula - "=DATE(LEFT(A8,4),MID(A8,5,2),1)"

In C8 write this - "=VLOOKUP($B8,$L$8:$R$14,3,FALSE)"

Copy paste the two formulas (all the way down in B column).

When you copy it to D8, change the 3 to 4 ... and so on.

LVL 50

Expert Comment

by:Ingeborg Hawighorst
ID: 35133551
Or, even shorter


The Column(C1) bit will return 3 in column C. When copied across, the reference will change to D1, E1, etc. returning 4, 5, etc. This will work if your datasets are in the same order in columns C to G and columns N to R.

If you use the formulas with Match() as per above, the order does not matter.

cheers, teylyn
LVL 50

Expert Comment

by:Ingeborg Hawighorst
ID: 35133850

thanks for the grade. Just as an FYI: Questions like these are normally rated with 500 points rather than 125. You will attract more experts if you assign more points to a question.

cheers, teylyn

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