Tagg: Power BI

The Data Frame The fundamental data structure used by the majority of R functions and packages is the data frame. In a data frame, sets of related values constitute rows, while an individual column vector in a data frame contains comparable measures that can be summed, averaged, or subjected to any number of numerical manipulations. […]

When I first evaluated Power BI a few years ago, the thing that impressed me most was that, unlike Sharepoint Power View, a developer could create new visualizations and integrate them into PBI. Some time later, Microsoft greatly expanded the ability of Power BI to include sophisticated graphs by adding to Power BI the ability […]

For me, one of the most valuable features of Power BI is the ease with which I can mashup data from a variety of different data sources. This, of course, requires importing data into Power BI’s internal xVelocity engine. For many others, however, it is critical to create Power BI reports and dashboards that reflect […]

Its name is Power Query Formula Language. But if you call it that, no one will know what you are talking about. The original informal language name M seems to have stuck, and even the Microsoft documentation refers to M. Every time you create a query in Power Query, whether in Excel or Power BI, […]

Several authors have described how to use the M function Diagnostics.Trace to monitor the performance of queries built with Power Query. In this installment, we will look at how to use the same function to record row-level error information in the trace log. Regardless of how we intend to use Diagnostics.Trace, nothing at all can […]