@jAtlas7

Data Analytics Consultant | Github: Atlas7 | Author https://xitter.cf/t.co/13wbIzWQDD | Macro-photographer - https://xitter.cf/t.co/PRYabxIx1E

 London
linkedin.com/in/johnnycnchan/
Joined May 2014
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Developed and deployed my first Big Data Visualization Web Application prototype with #HoloViews #GeoViews #Bokeh #Datashader #Dask #Conda #Docker #PyViz #Python #Heroku - visualizing 136k+ geo data points at different zoom/pan views. Github repo: github.com/Atlas7/bokeh-app-…
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Check out this interesting read at Data School dataschool.com/data-modeling…

Row vs Column Oriented Databases

Column oriented databases have become dominant over row oriented databases in data warehousing.

dataschool.com
(Pandas) How to get topmost n records within each group - a very simple one liner solution stackoverflow.com/questions/…
#Funky Vapourer #caterpillar just strolling down a #Haringey side street on Saturday. #moth cs
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Johnny Chan retweeted
Johnny Chan@jAtlas76 Apr 2018
Recently noticed 300+ GB disk storage was being consumed by Redis Local AppData - having read a few articles, have now deleted them all - recovered tons of storage. patrickdesjardins.com/blog/r…

Patrick Desjardins Blog - Redis' Service Eating Windows Hard drive Space

I noticed my hard drive losing space faster than usually. I decided to run a tool named "WinDirStat" which is free and allow to get a portrait of your hard driv…

patrickdesjardins.com
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Super bookmark of the day: flattening a Pandas dataframe (with json structures in some columns) - stackoverflow.com/questions/…
Thank you @lemon_disco and @jAtlas7 for spotting, taking and sharing photos of these two dragonflies @TCVLavenderPond yesterday. What stunning pics! A Black-tailed Skimmer and Emperor. #SouthwarkNature
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Wildlife photography at Horniman Museum Garden: Spider @HornimanMuseum
Wildlife photography at Horniman Museum Garden: Bumble Bee @HornimanMuseum
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Great Python / Jupyter tip: blog.godatadriven.com/write-…
theguardian.com/world/2019/j…

How Britain can help you get away with stealing millions: a five-step guide

The long read: Dirty money needs laundering if it’s to be of any use – and the UK is the best place in the world to do it

theguardian.com
The Crisis of Credit Visualized - HD youtube.com/watch?v=bx_LWm6_…

The Crisis of Credit Visualized - HD

The Short and Simple Story of the Credit Crisis -- The Full Version...

youtube.com
towardsdatascience.com/one-h…
A map of #DataScience, xkcd-style! bit.ly/quaesita_datasci
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"Of the cast of characters mentioned in this story, the only ones that every business needs are decision-makers and analysts. The others you’ll only be able to use when you know exactly what you need them for." hbr.org/2018/12/what-great-d…
Explainable AI won’t deliver. Here’s why. by @quaesita medium.com/p/explainable-ai-…
Simple guide to confusion matrix terminology dataschool.io/simple-guide-t…

Simple guide to confusion matrix terminology

A confusion matrix is a table that is often used to describe the performance of a classification model (or "classifier") on a set of test data for which the true values are known. The confusion...

dataschool.io
Netflix Recommendations: Beyond the 5 stars (Part 2) medium.com/netflix-techblog/…
mlwave.com/kaggle-ensembling…
snopes.com/fact-check/wolf-p…
Decision Tree example illustrates how Gradient Boosting work in each iteration: (1) make predictions, (2) compute residuals, (3) update predictions with residuals (that reduce residuals and make predictions more accurate in next iteration) by @groverpr4 medium.com/mlreview/gradient…

Gradient Boosting from scratch

Simplifying a complex algorithm

blog.mlreview.com
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