Flink Twitter Analysis

Flink can be really useful for analysing streaming data.

   bigdata, flink, twitter, streaming

QR Decomposition on Quaternion Matrices

Building a quaternion QR decomposition library in C using Householdertransformations or Givensrotations. What are Quaternions? Quaternions are an extension of the complex numbers. They are a four-dimenstional associative normed division algebra over real numbers. Multiplication of quaternions is non commutative. $q_1 q_2 \neq q_2 q_1 \text{for} q_1 , q_2 \in \mathbb{H}$ First we define a quaternion element in C: quaternion_t *quaternion_new_set(double q1, double q2, double q3, double q4) { quaternion_t *q = malloc(sizeof(quaternion_t)); if (q !