Voronoi Tesselation and Delaunay Trianglulation both perform spatial calculations on a set of irregular points. Voronoi Cells (sometimes referred to as Thiessen Polygons in the GIS world) make up a Voronoi Tesselation, which is the partitioning of a plane into polygons based on a set of points, so that for each point there is a corresponding polygon where the area in the polygon is closer to the corresponding point than any other point. Delaunay Triangulation is when a set of irregular points are divided into triangles, so that no point in the set is inside the circumcircle of any triangle created from the points.
Both of these processes have a bunch of really neat spatial analysis applications. In this article, we will talk about their implementation in Alteryx.
Have you ever tried to explore those mysterious tools with an R in the lower right-hand corner and been too confused to continue? Or have you not even installed the Predictive, Time Series, and Predictive Grouping tools? Well, here’s your chance to clear through your fog of confusion and utilize these powerful tools.
We recently released a Microsoft Kitthat included a text analytics tool. I wanted to compare the Microsoft sentiment analysis capability to a couple open source algorithms available. Here's how they stack up.
Does this sound familiar? You just watched a fantastic demonstration for advanced users on regression modeling. You think (who wouldn’t?!) “These tools look amazing…imagine what I can do!” So you jump into Alteryx and start plugging in your data! “BUT WAIT! What are all these error messages?!” Don't give up! Read this instead!
Want a way to interactively explore the relationships between products based on their attributes? Trying to understand the results of a market basket analysis? Alteryx provides the solution by combining predictive tools with the Network Analysis Tool.
You’ve blended your data. Cleansed it. Trained your model. Made more models. Tweaked them. Compared them. You’ve picked THE BEST model. It’s perfect. Now what? You need to get the rest of your organization using your model in a live production environment.
Last Friday was a very busy day for several of us at Alteryx in the wake of the announcement that Microsoft and Revolution Analytics had agreed to have Microsoft acquire Revolution Analytics. In this post I won't go into the Alteryx angle of this story, other than to say we think this is a net positive. Instead, I wanted to provide a few words of appreciation for what Revolution Analytics has done for both R based technology and for their non-technology contributions to the R community since its creation (as REvolution Computing) in 2007.