Data Engineering

Scaling out Tableau Extracts — Building a distributed Tableau Hyper Cluster

Tableau Hyper Database (“Extract”) is a great engine; it’s one of the reasons people are obsessed with Tableau analytics. However, being a single node database server, it has its limits (performance…

Data Science

A comprehensive guide to text pre-processing with python

This is Part 1 of a pair of tutorials on text pre-processing in python. In this first part, I’ll lay out the theoretical foundations. In the second part, I’ll demonstrate the steps described below…

Data Science

Create a map of Budapest districts colored by income using folium in Python

Ever wondered how to draw a map of less common geographical areas? And color them based on some data? This pair of tutorials shows how to build this from scratch! First, you need to construct the…

Data Visualization

Draw a map of the districts of Budapest using the Overpass API of OpenStreetMap and Python

Ever wondered how to draw a map of less common geographical areas? Perhaps even colour them based on some data? This is the first in a series of two tutorials that show you how to build this from…

Data Visualization

Here’s how we upgraded our marketing analytics - Starschema Blog - Medium

I hate interrupting my analysis workflow by tabbing between different applications and interfaces. It’s irritating, decreases your productivity and just makes things harder to understand. Therefore…

Data Visualization

ITSM Analytics - Starschema Blog - Medium

Information Technology has become the backbone of almost every business in the last few decades, driving productivity and efficiency in every business function. Today, IT organizations have more…

Data Science

JIT fast! Supercharge tensor processing in Python with JIT compilation

At Starschema, we’re constantly looking for ways to speed up some of the computationally intensive tasks we’re dealing with. Since a good amount of our work involves image processing, this means…

Data Visualization

Employee turnover dashboard for your HR department.

“The ratio of the number of employees that leave a company through attrition, dismissal, or resignation during a period to the number of employees on payroll during the same period.” —…

Data Visualization

Tableau Version Control is here to make your life easier

If you are a Tableau server admin or interact with your Tableau admin, then the chances of you desperately crying out for their help over some accidental action is a quiet common possibility…

Data Visualization

Elevation, Voronoi and other spatial specialties in Tableau

People are generally lazy, but the laziness can be overridden through aesthetically pleasing content. We want visualizations that effortlessly communicates the core idea. The new Tableau Mapbox…

Data Science

Digging deeper into ensemble learning - Starschema Blog - Medium

Have you ever wondered how combining weak predictors can yield a strong predictor? Ensemble Learning is the answer! This is the second of a pair of articles in which I will explore ensemble learning…

Data Science

Combine your machine learning models for better out-of-sample accuracy

Have you ever wondered how combining weak predictors can yield a strong predictor? Ensemble Learning is the answer! This is the first of a pair of articles in which I will explore ensemble learning…

Data Science

Growing Neural Gas for Good: quantifying hard retinal exudates in diabetic retinopathy using GNGs

Diabetic retinopathy is a major cause of blindness in the developed world. Read how an uncommon neural network algorithm can be used to quantify the extent of disease.

Data Science

Quantifying hard retinal exudates using Growing Neural Gas algorithms

Diabetic retinopathy is a major cause of blindness in the developed world. Read how an uncommon neural network algorithm can be used to quantify the extent of disease.

Data Science

Self-Organising Feature Maps for fun and profit - Starschema Blog - Medium

This is Part 2 of a three-part series on competitive neural networks. You can find Part 1, an introduction to competitive neural networks, here. Part 3, which looks at a different competitive…

Data Science

Funderstanding competitive neural networks - Starschema Blog - Medium

Funderstanding is a little term I came up with a few years ago for fun ways of understanding complex concepts. The typical university way of teaching something is by laying the theoretical…

Data Visualization

YOUR DASHBOARD IS WATCHING YOU — YOU ARE BEING TRACKED

Data analysts work on improving your dashboard, and developing new features day and night, over the weekend, with eating or drinking being a low priority. Tableau end users then enjoy the fruit of…

Data Visualization

Your Tableau Dashboard is Watching You — You Are Being Tracked

Data analysts work on improving your dashboard, and developing new features day and night, over the weekend, with eating or drinking being a low priority. Tableau end users then enjoy the fruit of…

Data Visualization

EXTENSIONS IN TABLEAU AND “EXTENSIONS” ACROSS THE OCEAN

Nowadays, we are big on extensions. Starschema opened its new office across the Pond in D.C. Settling into our office in a usual American highrise building, many people wanted to know what our…

Data Visualization

Tableau Conference 2018 Guide - Starschema Blog - Medium

We have invited the best and brightest of our “data musicians” to create the festival of data at the birthplace of jazz. Sounds like music to your ears? Tableau Conference 2018 has a mission. To…

Blogs