Sunday, September 26, 2010

DAVERAGE

Averages the values in a column of a list or database that match conditions you specify.
Syntax
DAVERAGE(database,field,criteria)
Database    is the range of cells that makes up the list or database. A database is a list of related data in which rows of related information are records, and columns of data are fields. The first row of the list contains labels for each column.
Field    indicates which column is used in the function. Field can be given as text with the column label enclosed between double quotation marks, such as "Age" or "Yield," or as a number that represents the position of the column within the list: 1 for the first column, 2 for the second column, and so on.
Criteria    is the range of cells that contains the conditions you specify. You can use any range for the criteria argument, as long as it includes at least one column label and at least one cell below the column label for specifying a condition for the column.

Example
The example may be easier to understand if you copy it to a blank worksheet.


A
B
C
D
E
1
Tree
Height
Age
Yield
Profit
2
Apple
>10



3
Pear




4
Tree
Height
Age
Yield
Profit
5
Apple
18
20
14
105.00
6
Pear
12
12
10
96.00
7
Cherry
13
14
9
105.00




















Formula
Description (Result)
=DCOUNT(A4:E10,"Age",A1:F2)
This function looks at the records of apple trees between a height of 10 and 16 and counts how many of the Age fields in those records contain numbers. (1)
=DCOUNTA(A4:E10,"Profit",A1:F2)
This function looks at the records of apple trees between a height of 10 and 16 and counts how many of the Profit fields in those records are not blank. (1)
=DMAX(A4:E10,"Profit",A1:A3)
The maximum profit of apple and pear trees. (105)
=DMIN(A4:E10,"Profit",A1:B2)
The minimum profit of apple trees over 10 in height. (75)
=DSUM(A4:E10,"Profit",A1:A2)
The total profit from apple trees. (225)
=DSUM(A4:E10,"Profit",A1:F2)
The total profit from apple trees with a height between 10 and 16. (75)
=DPRODUCT(A4:E10,"Yield",A1:B2)
The product of the yields from apple trees with a height greater than 10. (140)
=DAVERAGE(A4:E10,"Yield",A1:B2)
The average yield of apple trees over 10 feet in height. (12)
=DAVERAGE(A4:E10,3,A4:E10)
The average age of all trees in the database. (13)
=DSTDEV(A4:E10,"Yield",A1:A3)
The estimated standard deviation in the yield of apple and pear trees if the data in the database is only a sample of the total orchard population. (2.97)
=DSTDEVP(A4:E10,"Yield",A1:A3)
The true standard deviation in the yield of apple and pear trees if the data in the database is the entire population. (2.65)
=DVAR(A4:E10,"Yield",A1:A3)
The estimated variance in the yield of apple and pear trees if the data in the database is only a sample of the total orchard population. (8.8)
=DVARP(A4:E10,"Yield",A1:A3)
The true variance in the yield of apple and pear trees if the data in the database is the entire orchard population. ( 7.04)
=DGET(A4:E10,"Yield",A1:A3)
Returns the #NUM! error value because more than one record meets the criteria.

Tips
  • You can use any range for the criteria argument, as long as it includes at least one column label and at least one cell below the column label for specifying the condition.
For example, if the range G1:G2 contains the column label Income in G1 and the amount 10,000 in G2, you could define the range as MatchIncome and use that name as the criteria argument in the database functions.
  • Although the criteria range can be located anywhere on the worksheet, do not place the criteria range below the list. If you add more information to the list by using the Form command on the Data menu, the new information is added to the first row below the list. If the row below the list is not blank, Microsoft Excel cannot add the new information.
  • Make sure the criteria range does not overlap the list.
  • To perform an operation on an entire column in a database, enter a blank line below the column labels in the criteria range.

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