Averange from the last 12 months

[#1]

I've got table looking like this:

ReadingDate,=avg(Cost)

,£189.56

11/04/2011,£10.00

28/05/2011,£326.00

02/06/2011,£12.00

28/06/2011,£53.00

10/09/2011,£956.00

11/10/2011,£63.00

01/01/2012,£36.00

11/04/2012,£150.00

12/05/2012,£100.00

and i am able to make averange of single date, but how to make averange of the year, but not from january to december, but from ex. from may last year to may this year, so from the last 12 months?

[#2]

Can you post an example qvw?

[ramoncova06]

https://community.qlik.com/docs/DOC-4247

check the info in this link

[#4]

You can use for example a calculate dimension like =Month(YourDateField) and then apply to that chart dimension some expressions, but certainly it isn't the most appropriate solution.

First of all, you have to use a/some calendar lookup table/s to solve this type of issues.

[buzzy996]

try this,

=num(avg({$<Year = {$(=only(Year))}, Month = {"<=$(=max(Month))"}>} LineSalesAmount), '$#,##0;($#,##0)')

[#6]

I'll describe it a bit more accurately. I've got date in format not compatible with Qlik (year & week number), but i already solved this and i wrote function which checks if date is in my chosen range or not. If it is, it writes sum of costs from that week, if not - it puts 'NaN' or 0 (none of that worked so far). So i've got table made of '-' (none value), 'NaN' (value not-interesting me at the moment) and actual numeric value. I'm very new to Qlik and i stuck at the moment of making avg of that column. And if you could tell me where i should write script to get one avg from the whole column, i'd be very glad.

Also thank you for trying to help me

[buzzy996]

is't possible to share ur .qvw app?

[#8]

Sorry, i can't do that, but i made screenshot explaining the situation

[miikkaqlick · Accepted solution]

Hi!

First of all, Qlikview does have function MakeWeekDate. You have Year and Week, that's all you need.

Put these to your script:

MakeWeekDate(Year, Week, 0) as Date, //This gives you proper day. Monday for weekday.

If( IsNull(LineValue), 0, LineValue) as LineValue //This replaces NULL-values from data

Then

=Avg( {$<Date = {"<=$(=Max(Date))>=$(=AddMonths(Date,-6)) "} >} LineValue)

This should do the trick.

Br,

Miikka

Climber Finland

[buzzy996]

okie,try tis way..

=If(urfield='NaN','NaN',avg({$<Year = {$(=only(Year))}, Month = {"<=$(=max(Month))"}>} urfield)

note:hope u have month &year fields in ur table.