Replicating Excel averageifs in PowerBI - excel-formula

I'm having difficulty replicating the following Excel calculation in power BI
=IFERROR(AVERAGEIFS(Data!$I:$I,Data!$A:$A,Tables!$C$2,Data!$B:$B,Tables!$E$2,Data!$E:$E,Tables!$B5), "N/A")
I am trying to calculate an average on 3 values, area, period and metric. In power bi using the quick measure it returns either the count of the metric title or the average of the metric, with an additional row for the values that are marked as n/a.
Count of Raw_Score average per metric_ref =
AVERAGEX(
KEEPFILTERS(VALUES('Data'[metric_ref])),
CALCULATE(COUNTA('Data'[Raw_Score]))
)
files / images here

maybe I understood the question wrong, so feel free to correct me, but you are simply trying to calculate an average for different groups, is that so?
First, when working with PowerBI do yourself a favor and forget how Excel works, your life ll be much easier.
Now for the solution.
The trouble is, that your score metric is not a correct data type for average calculation. In Edit Queries, change data type to number (prior step of replacing "N/A" to "" might be required)
(optional step) I would recommend fixing data type of all relevant columns.
With data in correct format, you simply create visualization and slice it with grouping label. Something like this:
Notice the small arrow near the Value-theme_ref field (in your case you should probably substitute it with Raw_Score columns). You simply change the calculation from Sum to Average, which should do the trick.
Once again, I apologize if I misunderstood the question. Feel free to specify.

Related

PowerBI DAX: logic to use aggregated table as parameter in functions or another workaround to calculate dataset KPI filtered by any field?

In PowerBI, I need to create a Performance Indicator (KPI) measure which evaluates dataset values in a scale from 0 to 1, with target (1) being the MAX value in a 20 years history. It's a national airport trip records open database. The formula is basically [value]/[max value].
My dataset has a lot of fields and I wish I could filter it by any of these fields, with a line chart showing the 0-1 indicator for each month based on the filters.
This is my workaround test solution:
Table 1 - Original dataset: if I filter something here, below tables also update (there are more fields to the left, including YEAR and MONTH
Table 2 - Reference to original dataset, aggregating YEAR-MONTH by the sum of "take-offs" (decolagens)
Table 3 - Reference to above (sum) table, aggregating MONTH by the max of "take-offs" (decolagens)
Table 4 - 'Sum table' merged to 'Max table' by MONTH as new table: then do [Value]/[Max] and we've got the indicator
So if i filter the original dataset by any fields, all other tables update accordingly and the indicators always stays between 0-1, works like a charm.
TL;DR
The problem is: I need to create a dashboard of this on Power Bi. So I need this calculation to be in a measure or another workaround.
My possible solution: by pure DAX code in the measure field, to produce Tables 2 and 3 so I'll divide the month sum values by their month max value (which will both be produced according to PowerBi dashboard slicers) and get the indicator dinamically produced.
I'm stuck at: I don't understand how can I reference a sum/max aggregate table in dax code. Something like = SUM (dataset[take-offs]) / MAX (SUM (dataset[take-offs])). Of course these functions do not work like that, but I hope I made my point clear: how can I produce this four table effect with a single measure?
Other solutions are welcome.
Link to the original dataset: https://www.anac.gov.br/assuntos/dados-e-estatisticas/dados-estatisticos/arquivos/DadosEstatsticos.csv
It's an open dataset, so I guess there's no problem sharing it. Please help! :)
EDIT: please download the dataset and try to solve this. Personally I think it's a quality statistics doubt that will eventually help others. The calculation works, it only needs a Power Bi Measure port.
Add the ALL formula:
Measure = SUMX(ALL('Table'),[Valor])/SUM('Table'[Max])
Example

PowerBI Percent Average Different Than Excel Average

I'm moving from an old Excel based reporting system to PowerBI and I'm finding some discrepancies.
When I take the same listed percentages in PowerBI and calculate the average in excel, it's different (See Below):
I have no idea what's going on here... I thought maybe it was a rounding issue, but it's just not making sense to me.
When I export the PowerBI data from the table and then average it in excel it's a different number.
That shouldn't happen, right?
Am I going crazy here?
When I calculate it manually I get 99.828% which should round to 99.83% as Excel shows.
It seems to me that the PowerBI average is simply incorrect.
Edit:
After applying RADO's answer, here are my results (I dropped the Round and it seems to work - I think maybe it's an issue with my data - not his methodology):
There is a critical difference between how Excel and DAX calculate averages.
Excel takes average of the rounded numbers in each row.
DAX (Power BI) calculates averages independently in each cell. Meaning that cell "total" is calculated not as average of rounded scores, but as average of non-rounded underlying values of the entire data set, which is then rounded. This is how DAX operates conceptually - each calculation is always done independently of other calculations in the table.
The way to fix it:
In Power BI, rewrite you DAX formula to use AVERAGEX instead of AVERAGE. For example:
Correctly Averaged Scores =
AVERAGEX(
VALUES(TableName[Submitter]),
ROUND(CALCULATE(AVERAGE(TableName[OrbScore])),2)
)
Here, we first create a list of distinct "Submitters". Then we iterate over the list, and for each submitter calculate its average and round it to 2 digits. Finally, we calculate the average of the rounded averages, essentially replicating the behaviour of Excel.

Displaying multiple items in Excel graph and few calculation issues

I've done some Googling for each of my issues but haven't found exactly the results as I wanted. Things I need to be done doesn’t probably include any macros/VBA skills, just basic knowledge of Excel.
Now to my spreadsheet. I'm a Dota 2 player and I like statistics. I like it that much that I'd like to keep track of my achievements and results. Only problem is that the game tracker sucks and to get great information in web you have to pay for it, so I decided it's time for me to create my own spreadsheet to track my skills.
I don't know which place is the best to share my spreadsheet but I uploaded it to Estonian uploading host, link is here. I will also provide with pictures so you don't have to download anything.
This is what it looks like in general:
Problem number 1: The left table, or column has 1000 rows. In web design it's possible to make elements fixed depending on the scroll, I'd like to use similar feature here. If the table gets scrolled down, the right table (area with games, bonus and graph) will get scrolled down with it.
Problem number 2: Average MMR. I'd like to show average MMR after each entry depending on the first entries. Right now there's avg MMR for J4:J8. The calculation for J8 looks like this: =AVERAGE(C4:C8). For J7 it looks like this: =AVERAGE(C4:C7). I'd like to do this for all my 1000 rows, but I don't want to type it out. If I try to drag down from the corner, it will continue with C5:C8, C6:C9 etc (so it changes the starting point)
Problem number 3: Under longestGame there's currently Date and Hero. This should show the Date and Hero of which the longest game occurred. I tried to do this with LOOKUP function but it required table to be in ascending order, which I don't want. For current, 44,22, there should be Storm Spirit and 14.06.2015.
Problem number 4: Graph. I'd like to display three series on graph - MMR, average MMR and game length (time). The problem is, that MMR and average MMR will be in the numbers on 3000-7000 but the game length will only be probably in timeframe 20:00-120:00. Maybe it's possible to add two sets of values to the Y axis or maybe set Time series maximum 200:00 and minimum 0:00 and create graph according to this. I'm really stupid making graphs and I haven't figured out a clever way yet.
Problem number 5: Graph again. Right now I have to set the series for the graph. I've currently set it to C4:C54 (so 50 rows). I'd like it to move around a bit and by that I mean that if there happens to be C55-th game then the graph would start from C5:C55 and move along (so it'll count 50 last games).
I'm in a benevolent mood so rather than downvoting your question, because it is not really suitable for this forum I'm going to give you some hints and guidance. The numbers below correspond to the problems in your question.
Excel permits more than one window to be used on the same workbook -
so one window can show the data and one the summary.
Find out about absolute and relative cell addressing - its a valuable bit of knowledge for anyone serious about Excel and it will be of use in solving your problem.
Find out about the MATCH function. You can use this to find out which row of your table contains the longest game, shortest game, max MMR, min MMR by matching an element from the summary on the right (cols M onward) against the appropriate column table on the left. The find out about the INDEX function - this can be used to pull the values in the columns for Hero and Date which correspond to a specific row (such as the row containing the longest game, shortest game, etc). Search INDEX MATCH and find out why using these two functions in combination is often preferred to using the VLOOKUP function
Persevere - there are graph options available to do what you want and the only way to really learn is to go through the pain of trying them out, failing and working at it until you succeed.
Set up an area of worksheet to hold the 50*3 table of data for your graphs. Find out about the COUNT function and think how it might be of use in determining which rows of the data table map to the 50 rows of graph data. Then think about how to populate the graph data table using one of the functions mentioned above. Incidentally, C4:C54 is actually 51 rows, not 50.

Calculating Percent of Total in Power Pivot Model

I have created a power pivot table as shown in the picture. I want to calculate quarter over quarter sales change. For which I have to divide for example corporate family "Acer" 's sales in 2012Q4 by sum of all the corporate family. I am using calculated measure to do this, but I am not sure what formula I can use.
My need is to create two columns, one for 2012Q4 percent of total and one for 2013Q1 percent of total. Then I will create another measure to find the difference. So the formula for 2012Q4 should be like this 1624442 / (1624442+22449+1200+16123) . Any idea which function can help me do it?
It sounds like you are measuring the change in the percent of total for each corporate family from quarter to quarter. You will need to create 3 calculated measures. I'm not sure what your model looks like so I can't give you the exact formula, but here is the idea.
CurrentQtr%ofTotal:= Divide(Sum('Sales'[Units]),Calculate(Sum('Sales'[Units]), All['Product'[Corporate Family])))
PrevQtr%ofTotal:= DIVIDE(CALCULATE(Sum('Sales'[Units]), DATEADD(DimDate[DateKey], -1, QUARTER)),
CALCULATE(Sum('Sales'[Units]), DATEADD(DimDate[DateKey], -1, QUARTER), All('Product'[Corporate Family]))))
Change%ofTotal:= DIVIDE(([CurrentQtr%ofTotal]-[PrevQtr%ofTotal]),[PrevQtr%ofTotal])
I used the divide function because it handles divide by zero errors. You use the ALL function to remove the filter on the Corporate Family column from the filter context. The Change%ofTotal is just to find the differenc. I'm calculating % change but you may just want to subtract.
Here's the link to a good blog post on time intelligence. And here's one on calculating percent of total.
For percentages please follow the tutorial on the Tech on the Net.
Adding another column where you calculate a difference between two pivot columns will not work - this column is "unpivotable", as it relies on a column defintion. You would need to copy and paste pivot as values to another worksheet and do the extra calculation there.

find average of calculated field in cognos 10.1

I have a calculated field a/b which makes sense at week level, where a is last of period metric and b is sum of the period metric. I need to find avg(a/b) for the weeks that fall under a month and not end_of_month(a)/sum(b) for the month. I made my a/b metric with regular aggregate as calculated and then monthly average metric with regular aggregate as average, but it doesn't work. The report is a crosstab report. How can I solve this?
Edit: a is end on hand inventory, b is sales, a/b is weeks of supply. Both a and b spread along product/location/time dimensions. For a, I've set its regular aggregate for time as last.
Your form of expression gives me error, so, I tried average((total([a] for [week]))/(total([b] for [week]))) which is error-free but doesn't give correct result. I used total[a] because it still has to sum along other dimensions except time. Any ideas?
I was also trying an alternative way- get the individual weeks of supply and then derive a new metric as (first week wos + ...+fifth week wos)/5. But I get a warning when I try to put a case statement as "Relational query objects are being used in conjunction with Dimensionally-modeled relational objects", and the metric give garbage value. How can I apply case involving relational item in query items of measure dimension?
You have to be more clearer on what you are trying to achieve.
Also, the header says framework manager, while you are talking about report.
My best guess is you need to use the for expression in your aggregate the values:
avg((max([a] for [week]))/(sum([b] for [week])))
You might need to use other (more sophisticated) summary function
for more details about the FOR and AT look here:
Using the AT and FOR Options with Relational Summary Functions

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