COUNTIF by days of week

[Raza]

I have three columns of data as shown below, but for the entire year:

A B C
08/01/06 Tue 2999.78
08/02/06 Wed 3283.59
08/03/06 Thu 1516.91
08/04/06 Fri 2108.34
08/05/06 Sat 2035.85
08/06/06 Sun 3972.03
08/07/06 Mon 2949.30

I need a formula that can calculate the average daily revenue by the day of
week, so for year I would know the average daily revenue by Tuesdays or
Thursdays, etc.

Thanks!

 

[Dave F]

Use SUMPRODUCT. More info here:
http://www.xldynamic.com/source/xld.SUMPRODUCT.html

Dave

 

[Marcelo]

Hi Raza,

=sunif(B2:b366,"Tue",C2:c366)/countif(b2:b366,"Tue")

hth
--
regards from Brazil
Thanks in advance for your feedback.
Marcelo



"Raza" escreveu:

 

[Raza]

The only problem is that 'Tue' is not actually Tue. The formula for B2 is
=A2, and the formatting is set up so that it shows Tue. When I pasted the
formula, it did not find any 'Tue' becuase really its a date. Any help?

 

[Marcelo]

ok,

use an auxiliar column (D for eg) with =weekday(a2) copy it down excel will
return 1 for Sun, 2 for Mon .... 7 for Sat

than use

=sumif(d2:d366,2,c2:c366)/countif(d2:d366,2)

hth
--
regards from Brazil
Thanks in advance for your feedback.
Marcelo



"Raza" escreveu:

 

[Marcelo]

just to clarify this formula will average Mon figures,

--
regards from Brazil
Thanks in advance for your feedback.
Marcelo



"Marcelo" escreveu:

 

[RagDyer]

Try this *array* formula:

=AVERAGE(IF(TEXT(B1:B365,"ddd")="tue",C1:C365))

--
Array formulas must be entered with CSE, <Ctrl> <Shift > <Enter>, instead of
the regular <Enter>, which will *automatically* enclose the formula in curly
brackets, which *cannot* be done manually. Also, you must use CSE when
revising the formula.

 

[Dave Peterson]

A variation of RagDyer's formula:

=AVERAGE(IF(weekday(B1:B365)=2,C1:C365))

Still an array formula.