[ COVER OF THE WEEK ]
Trust the data Source
[ LOCAL EVENTS & SESSIONS]
- Oct 11, 2018 #WEB Webinar – How to use Power Query and M to Create a Calendar Table
- Oct 10, 2018 #WEB Web Development vs Data Science
- Oct 09, 2018 #WEB Develop a Successful Cloud Computing Tech Startup Business! Berlin – Entrepreneur Workshop – Bootcamp – Virtual Class – Seminar – Training – Lecture – Webinar – Conference
[ AnalyticsWeek BYTES]
[ NEWS BYTES]
[ FEATURED COURSE]
[ FEATURED READ]
Storytelling with Data teaches you the fundamentals of data visualization and how to communicate effectively with data. You’ll discover the power of storytelling and the way to make data a pivotal point in your story. Th… more
[ TIPS & TRICKS OF THE WEEK]
Save yourself from zombie apocalypse from unscalable models
One living and breathing zombie in today’s analytical models is the pulsating absence of error bars. Not every model is scalable or holds ground with increasing data. Error bars that is tagged to almost every models should be duly calibrated. As business models rake in more data the error bars keep it sensible and in check. If error bars are not accounted for, we will make our models susceptible to failure leading us to halloween that we never wants to see.
[ DATA SCIENCE Q&A]
Q:Explain what a local optimum is and why it is important in a specific context,
such as K-means clustering. What are specific ways of determining if you have a local optimum problem? What can be done to avoid local optima?
A: * A solution that is optimal in within a neighboring set of candidate solutions
* In contrast with global optimum: the optimal solution among all others
* K-means clustering context:
Its proven that the objective cost function will always decrease until a local optimum is reached.
Results will depend on the initial random cluster assignment
* Determining if you have a local optimum problem:
Tendency of premature convergence
Different initialization induces different optima
* Avoid local optima in a K-means context: repeat K-means and take the solution that has the lowest cost
[ VIDEO OF THE WEEK]
Subscribe to Youtube
[ QUOTE OF THE WEEK]
You can use all the quantitative data you can get, but you still have to distrust it and use your own intelligence and judgment. Alvin Tof
[ PODCAST OF THE WEEK]
[ FACT OF THE WEEK]
YouTube users upload 48 hours of new video every minute of the day.