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Category: Python

Running Compiled Code In Azure ML

Published 2016-07-04 by Kevin Feasel

Max Kaznady shows how to use R or Python scripts to call compiled code within Azure ML:

In this post, we focus on sourcing R and Python’s external dependencies, such as R libraries and Python modules, which are not already installed on Azure ML and require code compilation. Commonly the compiled code comes from a variety of other languages such as C, C++ and Fortran. One could also use this approach to wrap their compiled code with R or Python wrappers and run it on Azure ML.

To illustrate the process, we will build two MurmurHash modules from C++ for R and Python using the following two implementations on GitHub, and link them to Azure ML from a zipped folder

Link via David Smith.  I knew it was possible to call compiled C code from Python and R, but didn’t expect to be able to do it within Azure ML, so that’s good to know.

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K-Means Clustering With Python

Published 2016-07-04 by Kevin Feasel

David Crook discusses k-means clustering and how to implement it using Python:

K-Means takes in an unlabeled data set and a whole real number, k.  K is the number of centroids, or clusters you wish to find.  If you do not know how many clusters there should be, it is possible to do some pre-processing to find that more automatically, however that is out of the scope of this article.  Once you have a data set and defined the size of k, K-Means begins its iterative process.  It starts by selecting centroids by moving them to the average of the data associated with them.  It then reshuffles all of the data into new groups based on the proximity to each centroid.

This is a big and detailed post, and worth reading in its totality.

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Buck Woody On R & Python

Published 2015-11-10 by Kevin Feasel

Buck Woody’s back to blogging, and his focus is data science.  Over the past month, he’s looked at R and Python.

First, on installing R:

In future notebook entries we’ll explore working with R, but for now, we need to install it. That really isn’t that difficult, but it does bring up something we need to deal with first. While the R environment is truly amazing, it has some limitations. It’s most glaring issue is that the data you want to work with is loaded into memory as a frame, which of course limits the amount of data you can process for a given task. It’s also not terribly suited for parallelism – many things are handled as in-line tasks. And if you use a package in your script, you have to ensure others load that script, and at the right version.

Enter Revolution Analytics – a company that changed R to include more features and capabilities to correct these issues, along with a few others. They have a great name in the industry, bright people, and great products – so Microsoft bought them. That means the “RRE” engine they created is going to start popping up in all sorts of places, like SQL Server 2016, Azure Machine Learning, and many others. But the “stand-alone” RRE products are still available, and at the current version. So that’s what we’ll install.

Also on installing and getting started with Python:

Python has some distinct differences that make it attractive for working in data analytics. It scales well, is fairly easy to learn and use, has an extensible framework, has support for almost every platform around, and you can use it to write extensive programs that work with almost any other system and platform.

R and Python are the two biggest languages in this slice of the field, and you’ll gain a lot from learning at least one of these languages.

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