Johnny Chan
@jAtlas7
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Data Analytics Consultant | Github: Atlas7 | Author https://t.co/13wbIzWQDD | Macro-photographer - https://t.co/PRYabxIx1E
London
Joined May 2014
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: https://t.co/QpE4lXTdWo
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Check out this interesting read at Data School
dataschool.com
Column oriented databases have become dominant over row oriented databases in data warehousing.
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(Pandas) How to get topmost n records within each group - a very simple one liner solution
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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.
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Super bookmark of the day: flattening a Pandas dataframe (with json structures in some columns) -
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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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"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."
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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
blog.mlreview.com
Simplifying a complex algorithm
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