Tag Archives: series

Series with symbolic powers

 Series with symbolic powers

Is there any way to perform series analysis with functions containing symbolic powers of their argument?

For example, suppose I have a function

f[x_] := f0 + f1 x^n + f2 x^(n+1) + O[x]^(n+2);

And I have this kind of equation:

x^2 f''[x] - f[x] + g[x] x^k == 0

where

g[x_] := g0 + g1 x + g2 x^2 + O[x]^3

I want to extract series coefficients of the equation above in order to set them to zero separately and establish relations between coefficients g0, g1, g2, f0, f1, f2.

Is this possible if the powers $ k$ and $ n$ are symbolic integer powers and all that I know is that $ k \ge 0, n \ge 0$ and they are integer? I tried to do this directly, but function

Series

does not work because of nonnumeric power, whereas function

Coefficient

returns incorrect result where, for instance, coefficient in front of $ x^n$ contains terms with numeric powers of $ x$ like $ x^2$ .

Thank you in advance.

1 Answer

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Brandon Victor Dixon Promoted To Series Regular On ‘Power’!

Brandon Victor Dixon Brandon Victor Dixon Promoted To Series Regular On ‘Power’!

After being a recurring character on Power, Brandon Victor Dixon has been promoted to a series regular for Season 5.

Dixon plays Terry Silver, the attorney for the St. Patricks, played by Omari Hardwick and Naturi Naughton.

This comes after another recurring player, Larenz Tate, was also promoted for Season 5.

From Executive Producer Curtis “50 Cent” Jackson and show creator Courtney Kemp, Power is a drama straddling the glamorous lifestyles of Manhattan’s rich and infamous and the dark underworld of the international drug trade.

The cast is led by Omari Hardwick as drug kingpin and nightclub impresario James “Ghost” St. Patrick, Joseph Sikora, as his brother in arms in the drug business, Tommy Egan; Naturi Naughton plays Ghost’ fierce, loyal wife Tasha St. Patrick and Lela Loren as his first love, Assistant U.S. Attorney, Angela Valdes.

Season Four picked up on the heels of James “Ghost” St. Patrick’s highly publicized arrest by his ex-girlfriend, Assistant U.S. Attorney Angela Valdes, for the murder of FBI Agent Greg Knox—a crime he did not commit. Ghost can’t outrun his past choices and mounting enemies this season, which threaten his freedom and his family’s safety at every turn. His fight for redemption brings him face-to-face with the Feds, the media, new allies, and old foes. But the biggest obstacle for Ghost remains himself and his internal struggle between the man he wants to be and the one he really is.

Power season 5 premieres in 2018.

Dixon, who has a notable Broadway resume, is coming off of portraying Aaron Burr in Hamilton. 

H/T: Deadline/ Shadow & Act

Idris Elba To Create And Star In 1980s-Set Comedy Series

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DAX Reanimator Series: Top Performers using SUMMARIZE

PBI Reanimator thumb DAX Reanimator Series: Top Performers using SUMMARIZE

Welcome back P3 nation, today I’d like to demonstrate some exciting ways to show Top Performing “things” using DAX. Most of what we’ll discuss has been covered before in previous posts written here at PowerPivotPro. Rob has extensively covered the topic of Top Performing “things” in not one, not two, but THREE previous posts! So today I want to start us off by reviewing these awesome techniques, and taking a look at how to some of those practices can be used in a Power BI report. wlEmoticon smile 2 DAX Reanimator Series: Top Performers using SUMMARIZE

Previous Top Performing Posts:

DAX Can Return More Than Just Numbers Or Dates…

Top Performing Thing thumb 10 DAX Reanimator Series: Top Performers using SUMMARIZEThe beautiful thing about Top Performing DAX Measures is that it’s portable & dynamic! Basically any way we slice and dice our data, [Top Sales Day] will change with it, JUST like any other DAX Measure (E.g. [Total Orders] or [Total Profits]). In my opinion, showing top performers is a powerful (and useful!) DAX Measure. I’m not sure about you, but when I was first learning DAX years back, I never considered using a “Math Engine” to return text outputs. Rob’s post really helped open my eyes to the world of possibilities that DAX is capable of.

Today’s post will be using the SUMMARIZE method to return my Top Performing “Thing”. Rob’s second post originally used FIRSTNONBLANK() to return the same result. However, Gerhard Brueckl provided a great follow up in the post comments showcasing a FASTER way to do this using SUMMARIZE. The beauty in using SUMMARIZE is that it turns the filter-context (slower…) into row-context (faster!), then uses TOPN to return only the first row with the most [DAX Measure]. Using the image above as the example, let’s take a look at the [Top Sales Day] measure that uses the SUMMARIZE function.

Top Sales Day =
IF (
    NOT ( ISBLANK ( [Total Orders] ) ),
    MAXX (
        TOPN (
            1,
            SUMMARIZE ( ‘Calendar’, Calendar[Date], “Order Count”, [Total Orders] ),
[Order Count]
        ),
‘Calendar'[Date]
    )
)

Top Performing Day Amount thumb DAX Reanimator Series: Top Performers using SUMMARIZEAs you can see there’s multiple layers to this DAX Measure, but I can assure you they all have a purpose! Let’s start from the inner most query and move our way out. 1)The SUMMARIZE function returns a virtual summary table of Sales Days and [Total Orders]. 2)We then use TOPN to return the row (Sales Day) with the highest order count from the SUMMARIZE virtual table. However TOPN returns a table, and DAX measures can’t display a table…they require a single (scalar) value output. 3)X Functions to the rescue! Since we need a single value output we can use the MAXX to convert our table INTO a single (scalar) value, which for us is the Sales Day.  To be fair I’m arbitrarily using the MAX(X) function, but I could have just as easily used ANY of the X Functions (E.g. MINX, SUMX, etc…). The only purpose of this step is to convert a table to a single (scalar) value output. Simple right? wlEmoticon winkingsmile DAX Reanimator Series: Top Performers using SUMMARIZE

Why Stop Here? Let’s Return The Top Value Too!

Not only can you use DAX to return a Top Performing “thing”, we can also return the Top Value! Rob’s most recent post on top performers shows an easy way to return the value associated with the top performing thing. Let’s say we had a scenario where we ALSO wanted to know what the Top Sales Day Amount was. We could use a variation of the above DAX Measure, this is true. However what if I also wanted to know the DOLLAR AMOUNT associated with that sales day? Well friends, we can have our cake and eat it too in this scenario. We ask, and DAX can deliver!

Top Sales Day Amount =

MAXX
(‘Calendar’, [Total Sales])

Compared to our Top Purchasing Customer Measure, this one is much simpler! The measure looks at our calendar table, and then returns the value [Total Sales] for the row (which is day on the calendar table). With our amount measure on hand, we can create an easy DAX measure that uses CONCATENATE to bring together both of these values. Throw in a little formatting love to make our values display correctly, and we have ourselves a magical formula! I’d highly recommend giving Rob’s third article a read for more information on this one.

Top Sales Amount & Day =

FORMAT
( [Top Sales Day Amount], “$ 0,0” ) & ” / “
& FORMAT ( [Top Sales Day], “mmm dd, yyyy” )

All of these DAX Measures are available in the embedded Power BI Report or in the report download link below. For anyone wanting to know how I made my DAX measures as pretty as they are, checkout a post I wrote on an awesome tool called DAX Formatter. That’s it for today’s post, I hope you enjoyed today’s post as much as I enjoyed making it! As long as you were able to add another tool (or two) to your belt, then my job is done. As always I look forward to reading your comments, until next time!

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Upcoming Webinar Series: All About Dynamics 365 for Finance and Operations

Finance and Operations 300x225 Upcoming Webinar Series: All About Dynamics 365 for Finance and Operations

As the Dynamics 365 platform continues to evolve and change, we want to help keep you up on the latest and greatest info—so we’ve put together a webinar series featuring some of our resident Finance and Operations experts. Register for one or all of the series, and learn everything from the basic nuts and bolts of Dynamics 365 for Finance and Operations to upgrading your current system, exploring deployment options, learning what’s new since the July 2017 Update, and more.

_____________________________________________________________________________________________________________________________________________________________

Webinar 1: What is Dynamics 365 for Finance & Operations?

October 24, 2017, 9:00 am CT

The Microsoft Dynamics suite of products has evolved to better serve the business demands of an increasingly complex and competitive landscape. As the traditional ERP workload, Dynamics AX has undergone digital transformation and brought under the Dynamics 365 umbrella.

Join us as we explore the evolution of Dynamics AX, an overview of Dynamics 365 as a whole, and the Finance and Operations workload within Dynamics 365. We’ll cover how this product can meet the needs of an end-to-end ERP solution.

Register Now

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Is Dynamics 365 for Finance and Operations Right for Me?

October 26, 2017, 9:00 am CT

In this webinar, we will explore the capabilities of the Finance & Operations workload of Dynamics 365. It will give you a greater understanding of the functionality included in the product and whether it can answer the needs of your organization for an ERP solution.

Learn the capabilities of the product, get a demonstration of workspace functionality, and understand key use cases. Stay for a question and answer period at the end.

Register Now

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Partnering with PowerObjects for an End-to-End Dynamics 365 Solution for Sales, Operations, and More

October 31, 2017, 9:00 am CT

Join PowerObjects to discuss how Dynamics 365 for Finance & Operations can integrate seamlessly with other Dynamics 365 offerings, such as the CRM workloads of sales, marketing, and customer service. Topics include:

We’ll provide an overview of PowerObjects’ value offering, our integrated areas of focus, and how we can provide end-to-end Dynamics 365 solutions, including CRM.

Register Now

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What’s New to Dynamics 365 for Finance and Operations

November 2, 2017, 9:00 am CT

This webinar will specifically explore the newest features that were unveiled in the latest release of Dynamics 365 for Finance and Operations. We will spend our time introducing you to the new and exciting features released in the July 2017 Update and how you can get the most of them.

Register Now

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Upgrading from Dynamics AX or Other Legacy Systems to Dynamics 365 for Finance and Operations

November 7, 2017, 9:00 am CT

What will it take for your organization to upgrade to the latest and greatest in the Dynamics product line? If you are current on a version of Microsoft Dynamics AX or another legacy system and are exploring an upgrade to Dynamics 365 for Finance and Operations, this webinar is for you.

Register Now

_____________________________________________________________________________________________________________________________________________________________

Dynamics 365 for Finance and Operations: Cloud, On-premises, and Hybrid Deployment Options

November 9, 2017, 9:00 am CT

One of the most important considerations when implementing a Dynamics 365 solution is how it will be deployed. In this last webinar in our series on Dynamics 365 for Finance and Operations, we’ll lay out the available deployment options for your solution, along with the pros and cons of each type of deployment.

Register Now

_____________________________________________________________________________________________________________________________________________________________

As always, please feel free to reach out to us with any questions.

Happy Dynamics 365’ing!

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PowerObjects- Bringing Focus to Dynamics CRM

Jordan Peele Is Developing A Television Drama Series On Nazi Hunters

Jordan Peele Jordan Peele Is Developing A Television Drama Series On Nazi Hunters

Jordan Peele has his first project set under his TV development deal with Sonar Entertainment.

David Weil will write the script and be an executive producer with Peele.

While a network is not attached to the series yet, insiders tell The Hollywood Reporter that it is drawing interest from several.

The Hunt’s description: “It follows a diverse band of Nazi Hunters in 1970s America as they set out on a quest for revenge and justice — tracking and killing hundreds of Nazis who, with the unconscionable help of the U.S. government, escaped justice and embedded themselves in American society.”

The Get Out mastermind is also teaming up with Spike Lee on a Black Klansman film and is producing the upcoming TBS comedy, The Last O.G. starring Tracy Morgan and Tiffany Haddish.

Source: Shadow & Act

Jessica Williams To Star In New Comedy For Showtime!

‘Tidal X: Brooklyn’ Concert Announced- Announcements Made If Jay Z And Beyonce Are Performing

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How-To Video Series: Integrate Popular SaaS Applications with TIBCO Cloud Integration

rsz bigstock 146338313 How To Video Series: Integrate Popular SaaS Applications with TIBCO Cloud Integration

Integrating your SaaS apps is the key to any successful cloud project. The use of cloud applications is only expected to rise, as Gartner predicts it will grow by 20% to $ 46 billion in 2017. So finding an easy, quick, and cost-effective way to integrate your SaaS apps with each other and with the other systems in your organization is crucial.

In this how-to video series, we’ll show you step-by-step how to use TIBCO Cloud Integration to integrate some of today’s most popular marketing and sales SaaS tools. Included in the series are detailed demos of how to connect platforms like Salesforce and Marketo, how to easily create, manage, and deploy APIs within one tool, and how TIBCO Cloud Integration works with hybrid and multi-cloud environments alike. And each video is only about 7 minutes!

Using pre-built connectors, we’ll check out how you can quickly integrate Salesforce and Marketo to move data in and out for more complete contacts, accounts, opportunities, and leads. With the Web Integrator tool and its intuitive visual modelling, we’ll show you how to easily build, model, test, share, and deploy all of your APIs. Fun fact: TIBCO is the only vendor that enables you to do all this with your APIs on one platform, allowing you to set up integrations to any service you choose (whether it’s in the cloud, on-premise, across multiple clouds, or built on a legacy system).

TIBCO Cloud Integration is an intuitive cloud integration solution that makes connecting to SaaS applications simple and efficient. You can learn more and start your free trial, or watch our quick on-demand demo.

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DAX Reanimator Series: Moving Averages Controlled by Slicer (Part 1)

upload 3 300x150 DAX Reanimator Series: Moving Averages Controlled by Slicer (Part 1)

In 2013, Rob showed how touse a disconnected table and slicer to show moving averages with a variable time period. That post built on an earlier post, which steps through the process of creating moving averages.

What-If-Parameters, teased at MDIS in June 2017, have just been released to Power BI. This is a great new way to get disconnected tables into Power BI. But, it should also help more people than ever discover the joy of disconnected tables. With the latest update of Power BI, you can now CLICK A BUTTON to create new what-if-parameters. As a result, the button creates a series of numbers in a disconnected table and a harvester measure to get the selected value. As an added bonus, you can even add the slicer to the page at the same time.

So, could we use the what-if-parameters to get the same results? Let’s try it. To begin with, we’ll need a Sales and Calendar table and a DAX measure for Units Sold.

Step 1: Create a new What-if-ParameterMA Length parameter 1 DAX Reanimator Series: Moving Averages Controlled by Slicer (Part 1)

From the Modeling tab, click the New Parameter button to bring up the  window. This window creates a table and a DAX harvester measure. You can also add a slicer to the page. Values for Minimum, Maximum, and Increment are required. As a great touch, there’s an optional AlternateResult. This default value is in effect if no slicers are active, or if the user clicks more than one slicer.

     = SELECTEDVALUE (Table[ColumnName, [AlternateResult] )

In a recent post, Matt Allington points out that this function is the same as:

     =IF(HASONEVALUE(Table[Column]), VALUES(Table[Column]), )

Step 2: View your new disconnected table and slicer
MA Length parameter 2 1 DAX Reanimator Series: Moving Averages Controlled by Slicer (Part 1)

The new table now displays in the fields area. Before, we had to make these tables in Power Query, or with the Enter Data button in Power BI. But no more! Now, the What-if button creates a table for us using DAX. No query or pasting required. By the way, this new tool is  only available in Power BI. Neither the What-If-Parameter nor the DAX functions behind it are yet available in Excel.

The What-If-Parameter button created this tableMA Length parameter table e1504038063750 DAX Reanimator Series: Moving Averages Controlled by Slicer (Part 1)

Note the new GENERATESERIES() function!  This is how the table looks in Data view. There’s a table formula at the top and the results on the rows of the table.

     [MA Length] = GENERATESERIES(-12, 12, 1).

This formula plugs in the values from the window: start of -12, end of 12, and move up by 1. Increment can be any positive number like 2, 5, or .05.

     GENERATESERIES ( StartValue, EndValue, [IncrementValue] )

The formulas below are from Rob’s original post. I made a couple of changes. Firstly,I replaced the original harvester measure.

     [Variable Moving Sum] =
     VAR CurrentDate =
          IF (
               [MA Length Value] > 0,
               FIRSTDATE ( ‘Calendar'[Date] ),
               LASTDATE ( ‘Calendar'[Date] )
          )
     RETURN
     CALCULATE([Units Sold],
          DATESINPERIOD(Calendar[Date],
          CurrentDate,
          [MA Length Value],Month
          )          
     )
     [Variable Moving Average] =
     [Variable Moving Sum] /
          CALCULATE( DISTINCTCOUNT(Calendar[Year Month]),
               DATESINPERIOD(Calendar[Date],
               LASTDATE(Calendar[Date]),
               [MA Length Value], Month
          )
     )

Secondly, I set the first argument for DATESINPERIOD based on whether the range is forward or back. The original post advised this step to fix the time range for forward averaging.

Here’s the syntax for DATESINPERIOD():

     DATESINPERIOD(,,,)

How do we get the right number of months going forward?

DATESINPERIOD casts ahead or back x months, starting with the start date parameter. Going back, there’s no problem because it starts with the last date of the current month, and therefore includes the full current month. Going forward, the measure should begin with the first date of the current month in order to include the full month. Instead, if the last date is used for forward averaging, the period will include one day from the current month. And this makes the count of months one more than it should be! For example, with three months forward, the measure would divide by four instead of three. So, the formula for [Variable Moving Sum] here corrects this issue. Since our variable switches between FIRSTDATE() and LASTDATE(),  this gives us the right count of months.

After creating these measures, we can put [Variable Moving Average] on the chart. Then, we can apply color to the sales and moving average lines. In addition, we also have new formatting options: markers and line style.

Step 3: Create & format your moving average chartVariable Moving Average Graph 1 DAX Reanimator Series: Moving Averages Controlled by Slicer (Part 1)

The AlternateValue of the harvester measure is -3. Thus, the moving average displays at three months back, even without a slicer selection. All great stuff!

Personally, I love these new What-if-parameters. And I especially love GENERATESERIES(). However, with fine tuning, we can go beyond what what’s possible out of the box. So stay tuned later this year for some cool stuff in Part 2!

Thanks to Reid Havens, for designing the moving averages dashboard. Download it below!

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Spike Lee Developing Comedic TV Series Inspired By ‘Young Black Mark Zuckerberg’ Tech Entrepreneur

 Spike Lee Developing Comedic TV Series Inspired By ‘Young Black Mark Zuckerberg’ Tech Entrepreneur
LEE: MATTEO PRANDONI/BFA/REX/SHUTTERSTOCK; SANDERS: JONESWORKS

Spike Lee is gearing up to shop around a new TV series with tech entrepreneur and multi-hyphenate rising star Chad Sanders, according to sources.

The series, titled “Archer,” is a dark comedy and sociological thriller capturing the life of a 20-something African-American coding genius and iconoclast living in Brooklyn who has developed a dating app that reads sexual chemistry. The central character is described as a “young, black Mark Zuckerberg-like protagonist,” and the story will travel between New York, Silicon Valley, and Berlin’s famously sexual environment.

The project is loosely based on the life of Sanders, a tech entrepreneur who formerly served as a partner and head of business development at Dev Bootcamp, an intensive coding school that was eventually sold to Kaplan for double-digit millions. Sanders spent the first four years of his career with Google. He recently founded the business development agency Archer Genius Management, which is the basis for the title of the series.

Sanders is the creator and star of the series, in addition to serving as executive producer, writer, and director. Lee is on board to direct the pilot episode and will executive produce through his 40 Acres and A Mule Filmworks production banner. Sanders and Lee, who both coincidentally graduated from Morehouse College, first met through a mutual family friend.

The series will be pitched to a wide variety of networks, and no particular platform is being eyed at this point.

For Lee, “Archer” marks the filmmaker’s latest television project, following his upcoming Netflix series “She’s Gotta Have It,” which launches this November.

Sanders is repped by WME and managed by Oronde Garrett at Headshell Management. Lee is repped by ICM.

Source: Variety

On This Day In Comedy… In 2002 ‘Undercover Brother’ Was Released

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Oprah Winfrey’s Network OWN Renews Hit Drama Series ‘Greenleaf’ For Season Three

Greenlief Oprah Winfrey’s Network OWN Renews Hit Drama Series ‘Greenleaf’ For Season Three

LOS ANGELES – OWN: Oprah Winfrey Network has renewed its acclaimed original drama series, “Greenleaf,” from Lionsgate, award-winning writer/producer Craig Wright (“Lost,” “Six Feet Under”) and executive producers Clement Virgo (“The Book of Negros”) and Oprah Winfrey (“Selma”) for a third season. Additionally, Rick Fox, who portrays journalist Darius Nash, has been upped to a series regular for the new season.  Previously announced, the second half of season two will return with a two-night premiere on Tuesday, August 15 and Wednesday, August 16 at 10 p.m. ET/PT and will regularly air Wednesday nights at 10 p.m. ET/PT.

“We can’t wait to see what another season of ‘Greenleaf’ will bring,” said Erik Logan, President, OWN: Oprah Winfrey Network.  “This series was instrumental in evolving OWN’s scripted programming and it continues to pull in viewers each week with its unique storytelling and characters.”

“We’re excited to extend our relationship with Oprah Winfrey and the OWN team for a third season of the hit series ‘Greenleaf,’” said Lionsgate Executive Vice President & Head of Worldwide Scripted Television Chris Selak.  “The combination of a brilliant creator, an incredibly talented cast and inspirational music have positioned ‘Greenleaf’ for a long run, and we can hardly wait to see where the third season takes us.”

Year to date, “Greenleaf” is the #5 original scripted series on ad-supported cable in W25-54 in Live+3.  It is Wednesday night’s #2 original scripted cable series for W25-54 and one of the Top 4 original scripted cable series for African-American women and total viewers.  The series is averaging over 2 million total viewers in Live+3.

Jay-Z And NAS Rap Like Biggie In ‘Biggie: The Life of Notorious B.I.G.’ Trailer

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DAX Reanimator Series – Part 3: Compare Product Performance After Launch

grinch oh the noise thumb DAX Reanimator Series – Part 3: Compare Product Performance After Launch

Reports Without Direction Can be “Noisy”Launch Quantity Dashboard thumb 2 DAX Reanimator Series – Part 3: Compare Product Performance After Launch

Welcome back readers, to another chapter in the DAX Reanimator Series! The post I’ll be re-envisioning today is one I’m very excited about. It’s an article that does some really cool magic using DAX, business logic, and a clever model design. It showcases a problem and solution that I think a LOT of companies experience. Frankly, if you sell a product or service, good chance you want to know how successful it is after launch.

Let’s Reinvent The Idea of “Time”

Sounds simple enough! We’d just write a DAX Measure to look at that product on a graph over time right? Well that’s where some complexities come in…because the launch of each product started at a different point in time. So placing sales data onto a graph with a date field would result in us comparing apples to oranges, since most product didn’t launch at the same time.

So the clever solution would be to create an artificial time perspective starting from the product launch date. With the launch date being the point-in-time for the release for a given product. Think of sales from product launch as a race, well now we’ve just put everyone on the same starting line. Still with me? Good, because we basically just became time ninjas!

Time Ninja thumb DAX Reanimator Series – Part 3: Compare Product Performance After Launch

What I Imagine A Time Ninja Would Look Like:

Cumulative Quantity Over Time thumb 1 DAX Reanimator Series – Part 3: Compare Product Performance After Launch

“I Made This!” ~ A Time Ninja – AKA Cumulative Sales by Launch Period:

Highlights From The Original Post

The original post was written by us back in 2014, and can be found here. It’s original intent was to showcase the power of (the now retired) Power View. For those unfamiliar, Power BI Desktop is basically the spiritual successor and evolved form of Power View. The article does a bang up job of explaining all the concepts to of this model, and then walks you through all the steps needed to create your very own version. All of those steps can be transferred into a Power BI Desktop workbook, one of the beauties of the Power BI Desktop!

The post also references the coined terms for success rate buckets, originally conceived by some clever folks over at Tableau. They grouped success rates into three categories: the Rocket Ship, the Hot Burner, and the Slow Burner. These categorizations were originally from Tableau’s Tale of 100, and it is an article I would say is worth reading for the intellectually curious. It provides some cool analysis and charting when looking at how fast successful tech companies grow.

Cumulative Sales Since Product Launch thumb DAX Reanimator Series – Part 3: Compare Product Performance After Launch

Example of the success buckets from the original post:

I want to also give one shout out to our colleagues over at SQLBI. They provided the Cumulative Total DAX formula we modified in the original post. It’s a link I’ve had bookmarked for YEARS, and has some wonderful DAX formulas and explanations. You can find more info about it either in the original post, or at the SQLBI link. Now with that said, here’s the Power BI embedded report! Enjoy, and until next time P3 Nation. wlEmoticon smile 6 DAX Reanimator Series – Part 3: Compare Product Performance After Launch

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