创建每周过滤器的 6 个月滚动平均值 [英] Create 6 months rolling average on week filter
问题描述
我正在尝试创建一个报告,该报告应提供每周数据,但还应提供一列,用于滚动 6 个月至上个月和去年同期.
I am trying to create a report, which should give weekly data but also a column for rolling 6 months till the last month and the same period last year.
我可以使用以下公式计算滚动平均值:
I am able to calculate the rolling average using the formula below:
6 months rolling =
VAR period_end =
CALCULATE(
MAX('Dimensions'[Month Start Date]),
FILTER(
ALL('Dimensions'[Year Week]),
'Dimensions'[Year Week]=SELECTEDVALUE('Dimensions'[Year Week])
)
)
VAR period_till =
FIRSTDATE(
DATESINPERIOD(
'Dimensions'[Month Start Date],
period_end,
-1,
MONTH
)
)
VAR period_start =
FIRSTDATE(
DATESINPERIOD(
'Dimensions'[Month Start Date],
period_till,
-6,
MONTH
)
)
RETURN
CALCULATE(
SUM(Total_Sales),
DATESBETWEEN(
[Month Start Date],
period_start,
period_till
)
)
数据很好,但只要我在 [Year Week] 上放置切片器,它就会开始给出每周数据,而不是滚动平均值.
The data comes up fine but as soon as i put a slicer on the [Year Week], it starts giving the weekly data, rather than Rolling average.
我认为我需要使用 ALL 过滤器,但我的努力还没有得到回报.感谢您对此的任何帮助.
I think i need to use ALL filter but my efforts haven't paid off on it too yet. Appreciate any help on this.
报告结构是这样的:
类别
Current_Week_Data
Current_Week_Data
上年同周数据
差异百分比
滚动 6 个月(今年 - 前 6 年 6 个月/前一年 6 个月)
rolling 6 months (this year - previous 6 year 6 months /previous year 6 months)
推荐答案
我认为这可以解决问题.如果我们在 12 月(如现在),它将对今年 6 月至 11 月以及去年的 'Data'[X] 求和,然后计算分数变化.在计算方面,它不会受到 [Year Week] 上的切片器的影响
I think this will do the trick. If we are in Dec (as now) it will sum 'Data'[X] for June-Nov this year as well as last year, and then calculate the fractional change. It will not be affected, calculation wise, by a slicer on [Year Week]
Rolling n month average =
var n = 7 //number of months looking back
var currentDate = MAX('Calendar'[Date]) // max date in current context
var startDate = EOMONTH(EDATE(currentDate; -n);0) // end date of the 7th month back
var currentDateLY = currentDate-364 // Monday -> Monday, use 365 if date match is more important. Using 365 also removes strange values in the beginning/end of months.
var startDateLY = EOMONTH(EDATE(currentDateLY; -n); 0)
var theDataTY = // the data This Year
CALCULATE(
SUM('Data'[X]);
ALL('Calendar'[Year Week]);
FILTER(
ALL('Calendar'[Date]);
'Calendar'[Date] > ( startDate ) && 'Calendar'[Date] <DATE(YEAR(currentDate);MONTH(currentDate);1) // the 6 month interval
)
)
var theDataLY = // the data Last Year
CALCULATE(
SUM('Data'[X]);
ALL('Calendar'[Year Week]);
FILTER(
ALL('Calendar'[Date]);
'Calendar'[Date] > ( startDateLY ) && 'Calendar'[Date] <DATE(YEAR(currentDateLY);MONTH(currentDateLY);1) // the 6 month period last year
)
)
return
DIVIDE( // calculate the fractional change
theDataTY - theDataLY;
theDataLY;
0 // returns 0 if fraction is not defined.
)
我的设置中有两个表:日历"和数据".'Calendar'[Date] 和 'Data'[Date] 之间存在 1:* 关系.另外,我毫不怀疑在 DAX 中有更好的方法来做到这一点,这正是我应该做的.
I have two tables in my setup: 'Calendar' and 'Data'. There's a 1:* relationship between 'Calendar'[Date] and 'Data'[Date]. Also, I have no doubt that there is a better way of doing this in DAX, this is just how I would have done it.
希望这会有所帮助.
干杯,
奥斯卡
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