Skip to main content
cancel
Showing results for 
Search instead for 
Did you mean: 

Microsoft is giving away 50,000 FREE Microsoft Certification exam vouchers. Get Fabric certified for FREE! Learn more

Reply
ptmuldoon
Resolver I
Resolver I

Get Average of Last X Values

I'm working in Excel with PowerQuery and PowerPivot, and trying to figure out the correct formula/Measure that will return to the average of the Last X Values.

 

I've created a measure called 'Differential', and now I'm trying to get a rolling average of the last 7 values.  The values are in date order, but do not exist for every day.  Example of the existing pivot table being generated below.  Can I create a measure of the rolling 7 values from the 'differential' column/measure?

 

ptmuldoon_0-1744740029377.png

 

2 REPLIES 2
SundarRaj
Resolver III
Resolver III

Hi @ptmuldoon , is this what you are looking for? I'll attach the images of the Source, Output and M code. Thanks. Let me if I understood your query correctly.

SundarRaj_0-1744749101615.png

SundarRaj_1-1744749118326.png

SundarRaj_2-1744749174946.png

Here's the code:
let
Source = Excel.CurrentWorkbook(){[Name="Table3"]}[Content],
#"Changed Type" = Table.TransformColumnTypes(Source,{{"Row Labels", type any}, {"Differentials", type number}}),
Indexing = Table.AddIndexColumn(#"Changed Type","Index",0,1),
Numbers = Table.TransformColumns(Indexing,{"Index", each {_ - 6.._}}),
Negative = Table.TransformColumns(Numbers,{"Index", each List.Select(_, each _ >= 0)}),
Records = Table.TransformColumns(Negative,{"Index", each List.Transform(_, each #"Changed Type"{_})}),
Average = Table.TransformColumns(Records, {"Index",each if Table.RowCount(Table.FromRecords(_)) = 7 then List.Average(Table.FromRecords(_)[Differentials]) else null}),
Cols = Table.RenameColumns(Average,{{"Index", "Rolling Average"}})
in
Cols

(I have hardcoded the Rolling Average value that is 7, but that can added as a new step for it).

lbendlin
Super User
Super User

In PowerQuery you would use List.Select and List.Average .  In a measure you would use AVERAGEX and WINDOW. 

 

Please provide sample data that covers your issue or question completely, in a usable format (not as a screenshot).
Do not include sensitive information. Do not include anything that is unrelated to the issue or question.
Please show the expected outcome based on the sample data you provided.

Need help uploading data? https://community.fabric.microsoft.com/t5/Community-Blog/How-to-provide-sample-data-in-the-Power-BI-...
Want faster answers? https://community.fabric.microsoft.com/t5/Desktop/How-to-Get-Your-Question-Answered-Quickly/m-p/1447...

Helpful resources

Announcements
March PBI video - carousel

Power BI Monthly Update - March 2025

Check out the March 2025 Power BI update to learn about new features.

March2025 Carousel

Fabric Community Update - March 2025

Find out what's new and trending in the Fabric community.

"); $(".slidesjs-pagination" ).prependTo(".pagination_sec"); $(".slidesjs-pagination" ).append("
"); $(".slidesjs-play.slidesjs-navigation").appendTo(".playpause_sec"); $(".slidesjs-stop.slidesjs-navigation").appendTo(".playpause_sec"); $(".slidesjs-pagination" ).append(""); $(".slidesjs-pagination" ).append(""); } catch(e){ } /* End: This code is added by iTalent as part of iTrack COMPL-455 */ $(".slidesjs-previous.slidesjs-navigation").attr('tabindex', '0'); $(".slidesjs-next.slidesjs-navigation").attr('tabindex', '0'); /* start: This code is added by iTalent as part of iTrack 1859082 */ $('.slidesjs-play.slidesjs-navigation').attr('id','playtitle'); $('.slidesjs-stop.slidesjs-navigation').attr('id','stoptitle'); $('.slidesjs-play.slidesjs-navigation').attr('role','tab'); $('.slidesjs-stop.slidesjs-navigation').attr('role','tab'); $('.slidesjs-play.slidesjs-navigation').attr('aria-describedby','tip1'); $('.slidesjs-stop.slidesjs-navigation').attr('aria-describedby','tip2'); /* End: This code is added by iTalent as part of iTrack 1859082 */ }); $(document).ready(function() { if($("#slides .item").length < 2 ) { /* Fixing Single Slide click issue (commented following code)*/ // $(".item").css("left","0px"); $(".item.slidesjs-slide").attr('style', 'left:0px !important'); $(".slidesjs-stop.slidesjs-navigation").trigger('click'); $(".slidesjs-previous").css("display", "none"); $(".slidesjs-next").css("display", "none"); } var items_length = $(".item.slidesjs-slide").length; $(".slidesjs-pagination-item > button").attr("aria-setsize",items_length); $(".slidesjs-next, .slidesjs-pagination-item button").attr("tabindex","-1"); $(".slidesjs-pagination-item button").attr("role", "tab"); $(".slidesjs-previous").attr("tabindex","-1"); $(".slidesjs-next").attr("aria-hidden","true"); $(".slidesjs-previous").attr("aria-hidden","true"); $(".slidesjs-next").attr("aria-label","Next"); $(".slidesjs-previous").attr("aria-label","Previous"); //$(".slidesjs-stop.slidesjs-navigation").attr("role","button"); //$(".slidesjs-play.slidesjs-navigation").attr("role","button"); $(".slidesjs-pagination").attr("role","tablist").attr("aria-busy","true"); $("li.slidesjs-pagination-item").attr("role","list"); $(".item.slidesjs-slide").attr("tabindex","-1"); $(".item.slidesjs-slide").attr("aria-label","item"); /*$(".slidesjs-stop.slidesjs-navigation").on('click', function() { var itemNumber = parseInt($('.slidesjs-pagination-item > a.active').attr('data-slidesjs-item')); $($('.item.slidesjs-slide')[itemNumber]).find('.c-call-to-action').attr('tabindex', '0'); });*/ $(".slidesjs-stop.slidesjs-navigation, .slidesjs-pagination-item > button").on('click keydown', function() { $.each($('.item.slidesjs-slide'),function(i,el){ $(el).find('.c-call-to-action').attr('tabindex', '-1'); }); var itemNumber = parseInt($('.slidesjs-pagination-item > button.active').attr('data-slidesjs-item')); $($('.item.slidesjs-slide')[itemNumber]).find('.c-call-to-action').attr('tabindex', '0'); }); $(".slidesjs-play.slidesjs-navigation").on('click', function() { $.each($('.item.slidesjs-slide'),function(i,el){ $(el).find('.c-call-to-action').attr('tabindex', '-1'); }); }); $(".slidesjs-pagination-item button").keyup(function(e){ var keyCode = e.keyCode || e.which; if (keyCode == 9) { e.preventDefault(); $(".slidesjs-stop.slidesjs-navigation").trigger('click').blur(); $("button.active").focus(); } }); $(".slidesjs-play").on("click",function (event) { if (event.handleObj.type === "click") { $(".slidesjs-stop").focus(); } else if(event.handleObj.type === "keydown"){ if (event.which === 13 && $(event.target).hasClass("slidesjs-play")) { $(".slidesjs-stop").focus(); } } }); $(".slidesjs-stop").on("click",function (event) { if (event.handleObj.type === "click") { $(".slidesjs-play").focus(); } else if(event.handleObj.type === "keydown"){ if (event.which === 13 && $(event.target).hasClass("slidesjs-stop")) { $(".slidesjs-play").focus(); } } }); $(".slidesjs-pagination-item").keydown(function(e){ switch (e.which){ case 37: //left arrow key $(".slidesjs-previous.slidesjs-navigation").trigger('click'); e.preventDefault(); break; case 39: //right arrow key $(".slidesjs-next.slidesjs-navigation").trigger('click'); e.preventDefault(); break; default: return; } $(".slidesjs-pagination-item button.active").focus(); }); }); // Start This code is added by iTalent as part of iTrack 1859082 $(document).ready(function(){ $("#tip1").attr("aria-hidden","true").addClass("hidden"); $("#tip2").attr("aria-hidden","true").addClass("hidden"); $(".slidesjs-stop.slidesjs-navigation, .slidesjs-play.slidesjs-navigation").attr('title', ''); $("a#playtitle").focus(function(){ $("#tip1").attr("aria-hidden","false").removeClass("hidden"); }); $("a#playtitle").mouseover(function(){ $("#tip1").attr("aria-hidden","false").removeClass("hidden"); }); $("a#playtitle").blur(function(){ $("#tip1").attr("aria-hidden","true").addClass("hidden"); }); $("a#playtitle").mouseleave(function(){ $("#tip1").attr("aria-hidden","true").addClass("hidden"); }); $("a#play").keydown(function(ev){ if (ev.which ==27) { $("#tip1").attr("aria-hidden","true").addClass("hidden"); ev.preventDefault(); return false; } }); $("a#stoptitle").focus(function(){ $("#tip2").attr("aria-hidden","false").removeClass("hidden"); }); $("a#stoptitle").mouseover(function(){ $("#tip2").attr("aria-hidden","false").removeClass("hidden"); }); $("a#stoptitle").blur(function(){ $("#tip2").attr("aria-hidden","true").addClass("hidden"); }); $("a#stoptitle").mouseleave(function(){ $("#tip2").attr("aria-hidden","true").addClass("hidden"); }); $("a#stoptitle").keydown(function(ev){ if (ev.which ==27) { $("#tip2").attr("aria-hidden","true").addClass("hidden"); ev.preventDefault(); return false; } }); }); // End This code is added by iTalent as part of iTrack 1859082