Understanding Naïve Bayes Classifier Using R

January 22, 2018
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The Best Algorithms are the Simplest The field of data science has progressed from simple linear regression models to complex ensembling techniques but the most preferred models are still the simplest and most interpretable. Among them are regression, logistic, trees and naive bayes techniques. Naive Bayes algorithm, in particular is a logic based technique which … Continue reading Understanding...

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Exploring handwritten digit classification: a tidy analysis of the MNIST dataset

January 22, 2018
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Exploring handwritten digit classification: a tidy analysis of the MNIST dataset

In a recent post, I offered a definition of the distinction between data science and machine learning: that data science is focused on extracting insights, while machine learning is...

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Automating Basic EDA

January 22, 2018
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Automating Basic EDA

In any model development exercise, a considerable amount of time is spent in understanding the underlying data, visualizing relationships and validating preliminary hypothesis (broadly categorized as Exploratory data Analysis)....

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Rblpapi 0.3.8: Strictly maintenance

January 22, 2018
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Another Rblpapi release, now at version 0.3.8, arrived on CRAN yesterday. Rblpapi provides a direct interface between R and the Bloomberg Terminal via the C++ API provided by...

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Major update to BatchGetSymbols

January 22, 2018
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Making it even easier to download and organize stock prices from Yahoo Finance - ...

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Fatal Journeys: Visualizing the Horror

January 22, 2018
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In war, truth is the first casualty (Aeschylus) I am not a pessimistic person. On the contrary, I always try to look at the bright side of life. I...

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Predicting Conflict Duration with (gg)plots using Keras

January 21, 2018
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Predicting Conflict Duration with (gg)plots using Keras

An Unlikely Pairing Last week, Marc Cohen from Google Cloud was on campus to give a hands-on workshop on image classification using TensorFlow. Consequently, I spent most of my time...

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Wrapping Access to Web-Services in R-functions.

January 21, 2018
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Wrapping Access to Web-Services in R-functions.

One of the great features of R is the possibility to quickly access web-services. While some companies have the habit and policy to document their APIs, there is still...

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#15: Tidyverse and data.table, sitting side by side … (Part 1)

January 21, 2018
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#15: Tidyverse and data.table, sitting side by side … (Part 1)

Welcome to the fifteenth post in the rarely rational R rambling series, or R4 for short. There are two posts I have been meaning to get out for a...

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Advisory on Multiple Assignment dplyr::mutate() on Databases

January 21, 2018
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Advisory on Multiple Assignment dplyr::mutate() on Databases

I currently advise R dplyr users to take care when using multiple assignment dplyr::mutate() commands on databases. (image: Kingroyos, Creative Commons Attribution-Share Alike 3.0 Unported License) In this note...

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ggplot2 Time Series Heatmaps: revisited in the tidyverse

January 21, 2018
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ggplot2 Time Series Heatmaps: revisited in the tidyverse

I revisited my previous post on creating beautiful time series calendar heatmaps in ggplot, moving the code into the tidyverse. To obtain following example:Simply use the following code: I...

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R Weekly Bulletin Vol – XIV

January 20, 2018
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R Weekly Bulletin Vol – XIV

This week’s R bulletin covers some interesting ways to list functions, to list files and illustrates the use of double colon operator. Hope you like this R weekly bulletin....

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Who wants to work at Google?

January 20, 2018
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Who wants to work at Google?

In this tutorial, we will explore the open roles at Google, and try to see what common attributes Google is looking for, in future employees. This dataset is a...

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Rcpp 0.12.15: Numerous tweaks and enhancements

January 20, 2018
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The fifteenth release in the 0.12.* series of Rcpp landed on CRAN today after just a few days of gestation in incoming/. This release follows the 0.12.0 release from July...

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Winter solstice challenge #3: the winner is Bianca Kramer!

January 20, 2018
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Winter solstice challenge #3: the winner is Bianca Kramer!

Part of the winning submission in the category 'best tool'. A bit later than intended, but I am pleased to announce the winner of the Winter solstice challenge: Bianca Kramer! Of...

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Version 2.2.2 Released

January 19, 2018
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Version 2.2.2 Released

ggtern version 2.2.2 has just been submitted to CRAN, and it includes a number of new features. This time around, I have adapted the hexbin geometry (and stat), and...

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Data Driven DIY

January 19, 2018
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Data Driven DIY

Statisfix - Which fixing should I buy? I have a bathroom cabinet to put up. It needs to go onto a tiled plasterboard (drywall) wall. Because of...

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The Friday #rstats PuzzleR : 2018-01-19

January 19, 2018
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The Friday #rstats PuzzleR : 2018-01-19

Peter Meissner (@marvin_dpr) released crossword.r🔗 to CRAN today. It’s a spiffy package that makes it dead simple to generate crossword puzzles. He also made a super spiffy javascript library...

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Curb your imposterism, start meta-learning

January 19, 2018
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Recently, there has been a lot of attention for the imposter syndrome. Even seasoned programmers admit they suffer from feelings of anxiety and low self-esteem. Some share their personal...

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501 days of Summer (school)

January 19, 2018
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501 days of Summer (school)

As I anticipated earlier, we're now ready to open registration for our Summer School in Florence (I was waiting for UCL to set up the registration system and thought it...

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General Linear Models The Basics

January 18, 2018
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General Linear Models The Basics

General Linear Models: The Basics General linear models are one of the most widely used statistical tool in the biological sciences. This may be because they are so flexible and they can...

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Mapping a list of functions to a list of datasets with a list of columns as arguments

This week I had the opportunity to teach R at my workplace, again. This course was the “advanced R” course, and unlike the one I taught at the end...

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Sketchnotes from TWiML&AI #92: Learning State Representations with Yael Niv

January 18, 2018
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Sketchnotes from TWiML&AI #92: Learning State Representations with Yael Niv

These are my sketchnotes for Sam Charrington’s podcast This Week in Machine Learning and AI about Learning State Representations with Yael Niv: https://twimlai.com/twiml-talk-92-learning-state-representations-yael-niv/ Sketchnotes from TWiMLAI talk...

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SatRday in South Africa

January 18, 2018
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SatRday in South Africa

What is SatRday? SatRday in Cape Town Be in it to win it Jumping Rivers is proud to be sponsoring the upcoming SatRday conference in Cape Town, South Africa on 17th March...

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Registration and talk proposals now open for useR!2018

January 18, 2018
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Registration is now open for useR! 2018, the official R user conference to be held in Brisbane, Australia July 10-13. If you haven't been to a useR! conference before,...

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Check your prior posterior overlap (PPO) – MCMC wrangling in R made easy with `MCMCvis`

January 18, 2018
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Check your prior posterior overlap (PPO) – MCMC wrangling in R made easy with `MCMCvis`

When fitting a Bayesian model using MCMC (often via JAGS/BUGS/Stan), a number of checks are typically performed to make sure your model is worth interpreting without further manipulation (remember:...

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Bitcoin (World Map) Bubbles

January 18, 2018
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Bitcoin (World Map) Bubbles

We’re doing some interesting studies (cybersecurity-wise, not finance-wise) on digital currency networks at work-work and — while I’m loathe to create a geo-map from IPv4 geolocation data — we:...

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Getting started with spatial data in R – EdinbR talk

January 18, 2018
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Slides from January 2018 EdinbR session on spatial data in R.

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R-Akademie back in town – eoda R training returns to Hamburg in April

January 18, 2018
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R-Akademie back in town – eoda R training returns to Hamburg in April

After last year’s successful premiere, the eoda R-Akademie on the Road will be back in Hamburg this year for four inspiring days of professional R training for data scientists,...

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