R: Utilizing multiple CPUs

R is a great piece of software to perform statistical analyses. Computing power can however be a limitation. R by default uses only a single CPU. In almost every machine, multiple CPUs are present, so why not utilize them? In this blog post I’ll give a minimal example and some code snippets to help make more complex examples work.

Utilizing multiple CPUs

Luckily using multiple CPUs in R is relatively simple. There is a deprecated (more...)

Oracle Mobile Cloud Service (MCS): An introduction to API security: Basic Authentication and OAuth2

As an integration/backend developer, when starting a project using Mobile Cloud Service, it is important to have some understanding of what this MBaaS (Mobile Backend as a Service) has to offer in terms of security features. This is important in order to be able to configure and test MCS. In this blog I will give examples on how to configure and use the basic authentication and OAuth2 features which are provided to secure APIs. You (more...)

Machine learning: Getting started with random forests in R

According to Gartner, machine learning is on top of the hype cycle at the peak of inflated expectations. There is a lot of misunderstanding about what machine learning actually is and what it can be done with it.

Machine learning is not as abstract as one might think. If you want to get value out of known data and do predictions for unknown data, the most important challenge is asking the right questions and (more...)

Oracle SOA Suite: Find that composite instance!

When executing BPM or BPEL processes, they are usually executed in the context of a specific entity. Sometimes you want to find instances involved with a specific entity. There are different ways to make this easy. You can for example use composite instance titles or sensors and set them to a unique identifier for your entity. If they have not been used, you can check the audit trail. However, manually checking the audit trail, especially (more...)