﻿ data_admin – Page 100 – Data Science Austria

## Poisson Distribution Intuition (and derivation)

3. The shortcomings of the Binomial Distribution a) A binomial random variable is “BI-nary” — 0 or 1. In the above example, we have 17 ppl/wk who clapped. This means 17/7 = 2.4 people clapped per day, and 17/(7*24) = 0.1 people clapping per hour. If we model the success probability by hour (0.1 people/hr) using the … Read more Poisson Distribution Intuition (and derivation)

## Using AI to Determine Whether Figurative or Abstract Art is More Popular Today

While homo sapiens were capable of abstract thought almost 100,000 years ago, it took much longer for the human mind to invent abstract painting. It wasn’t until the beginning of the 20th century that artists such as Wassily Kandinsky, Kazimir Malevich, and Hilma af Klint created abstract works with no identifiable references to the physical … Read more Using AI to Determine Whether Figurative or Abstract Art is More Popular Today

## How to Install a Totally Free Windows 10 Operating System on Your Mac for Fun and Profit

You can run a totally different operating system for free right on your Mac. It could be up and running in about five minutes. Want a machine that’s running Windows 10? Done. Even the most devoted Mac fan might want or need to use Windows (or another operating system) at some point. You might want … Read more How to Install a Totally Free Windows 10 Operating System on Your Mac for Fun and Profit

## The Sleeping Beauty problem: a data scientist’s perspective

One of the first and particularly memorable lessons that I learned in courses on experimental physics was this: never, ever, draw a graph representing measurements without error bars. Error bars indicate the extend to which the value of a particular measurement is uncertain. There is a deeper truth to this practical rule. It implies that … Read more The Sleeping Beauty problem: a data scientist’s perspective

## Misleading With Data & Statistics.

Pitfalls In Processing Data As soon as data generation and acquisition is accomplished, data is processed. Data transforming, cleansing, slicing and dicing can produce many misleading results . In the following you find the three most frequent ones: Cherry Picking / Discarding Unfavourable DataIt is quite common in research that you get a big dataset and … Read more Misleading With Data & Statistics.

## Data Science-ish

When honest intelligence becomes the ugly duckling of science. A critical flaw in data science practices is beginning to surface: Decision-makers force data to justify their presumptions. So now that we’ve identified this problem, the solution is as simple as a change of perspective, right? False. Even if those in that position of power were to … Read more Data Science-ish

## Here is Your Data

It’s a common situation: you want to code and debug in R *and* leverage RMarkdown for a presentation or document. The challenge: file paths. Executing code in the console and from within a saved RMarkdown document typically requires distinct file paths to locate data files. While you’re writing your code and debugging, you’ve probably got your source … Read more Here is Your Data

## Speech Emotion Recognition with Convolution Neural Network

Recognizing Human Emotion from Audio Recording Image Credit: B-rina Recognizing human emotion has always been a fascinating task for data scientists. Lately, I am working on an experimental Speech Emotion Recognition (SER) project to explore its potential. I selected the most starred SER repository from GitHub to be the backbone of my project. Before we walk … Read more Speech Emotion Recognition with Convolution Neural Network

## Running cross_validate from cvms in parallel

(This article was first published on R, and kindly contributed to R-bloggers) The cvms package is useful for cross-validating a list of linear and logistic regression model formulas in R. To speed up the process, I’ve added the option to cross-validate the models in parallel. In this post, I will walk you through a simple … Read more Running cross_validate from cvms in parallel

## Snorkel — A Weak Supervision System

Today’s powerful models like DNN’s, produce state-of-the-art results on many tasks and they are easier to spin up than ever before (using state-of-the-art pre-trained models like ULMFiT and BERT). So, instead of spending the bulk of our time carefully engineering features for our models, we can now feed in raw data — images, text etc. to these … Read more Snorkel — A Weak Supervision System

## How A.I Will Enhance Content Marketing in the Future

Advances in A.I software and how they could improve the content marketing industry Image Source: UnSplash.com Artificial intelligence is starting to shape critical industries across the world on a considerable scale; this is evident in the marketing, gaming, healthcare, tech, and finance industries. The profits gained from utilizing A.I technology can be monumental, this can … Read more How A.I Will Enhance Content Marketing in the Future

## hompson Sampling For Multi-Armed Bandit Problems (Part 1)

Using Bayesian Updating For Online Decision Making “Multi-armed bandit” is perhaps the coolest term in data science, excluding financial applications to “naked European call options” or “short iron butterflies”. They are also among the most commonly encountered practical applications. The term has a helpful motivating story: a “one armed bandit” refers to a slot machine — pull the … Read more hompson Sampling For Multi-Armed Bandit Problems (Part 1)

## A Perceptron of the Artist as a Young Man

In which a neural network and I enjoy a book together via “Only five people in the world have read and understood Ulysses. I am not one of them.” My high school English teacher said this to my class many years ago. He was good at one-liners. (Another was, “You only have to explain 17% of a … Read more A Perceptron of the Artist as a Young Man

## Auria Kathi Powered by Microsoft Azure Machine Learning Pipelines

On January first this year, Fabin Rasheed and I have launched Auria Kathi, the AI Poet Artist living in the cloud. Auria writes a poem, draw an image according to the poem, then color it with a random mood. All these creative actions are carried out without any human intervention. Auria Kathi is an anagram … Read more Auria Kathi Powered by Microsoft Azure Machine Learning Pipelines

## Behind the Models: Beta, Dirichlet, and GEM Distributions

Building Blocks For Non-Parametric Bayesian Models In a future post I want to cover non-parametric Bayesian models — these models are infinite-dimensional and allow for expansive online learning. But first I want to cover some of the building blocks: Beta, Dirichlet, and GEM distributions. These distributions have several helpful properties that provide for a wide variety of machine … Read more Behind the Models: Beta, Dirichlet, and GEM Distributions

## Getting an environment’s name in R: the envnames package

Looking for an object in nested environments The following picture shows an environment space that highlights the connections between package and system environments (child -> parent relationships) and in particular the use of user-defined environments (outer_env and nested_env), which are part of the global environment and may be regarded as nested environments (within the global … Read more Getting an environment’s name in R: the envnames package

## 5 Questions to Ask Before Building a Readmissions Model

1. What Intervention? Before you jump to exact details, think about the big picture for a moment. Brainstorm how you’re going to use these predictions. Does your organization have interventions in place for patients that are deemed “high-risk” for readmissions? Will the patients be assigned a dedicated nurse while they are in the hospital? Will … Read more 5 Questions to Ask Before Building a Readmissions Model

## Making a Command Line HTML Rendering Script for “The Art of the Command Line” (in R)

The Feedly category I have setup for git-stalking has indicated a fairly massive interest in Joshua Levy’s The Art of the Command Line. What is “The Art of the Command Line”? To quote the author(s): Fluency on the command line is a skill often neglected or considered arcane, but it improves your flexibility and productivity … Read more Making a Command Line HTML Rendering Script for “The Art of the Command Line” (in R)

## Full EARL London 2019 agenda available

Once again, we are delighted to announce a stellar line up of speakers for this year’s EARL Conference; from Retail and Insurance to Media, Manufacturing and Pharmaceutical, the range of industries now using R stats in their workflow continues to grow. If you are interested to hear why companies such as BBC News, BMW Group, Arla … Read more Full EARL London 2019 agenda available

## Interested in AI Policy? Start writing

Photo by Glenn Carstens-Peters on Unsplash Recently, OpenAI’s Amanda Askell, Miles Brundage, and Jack Clark joined Rob Wiblin on the 80,000 hours podcast to discuss a wide range of topics related to AI philosophy. policy, and publication norms. During the conversation, they also discussed where to start if you’re trying to understand AI and AI … Read more Interested in AI Policy? Start writing

## What is Wavelet and How We Use It for Data Science

source: https://ak6.picdn.net/shutterstock/videos/28682146/thumb/1.jpg Hello, this is my second post for the signal processing topic. For now, I’m interested in learning more about signal processing to understand a certain paper. And to be honest for me, this wavelet thing is harder to understand than Fourier Transform. After I felt quite understanding about this topic, I realize something. … Read more What is Wavelet and How We Use It for Data Science

## Norms, Penalties, and Multitask learning

Introduction A regularizer is commonly used in machine learning to constrain a model’s capacity to cerain bounds either based on a statistical norm or on prior hypotheses. This adds preference for one solution over another in the model’s hypothesis space, or the set of functions that the learning algorithm is allowed to select as being … Read more Norms, Penalties, and Multitask learning

## RODBC helper function

The number of times I have to connect to SQL and I forget part of the RODBC command to connect to an internal data table. As part of a project I am working on I have been connecting to lots of different sources and became tired of typing lots of lines and repeating the same … Read more RODBC helper function

## Analyzing Anime data in R

If you are a fan of Anime then you are going to love this analysis I did in R. This data comes from the MyAnimeList website and was sourced as part of the Tidy Tuesday initiative by the R for Data Science community. You can download a tidy version of this data from here. They … Read more Analyzing Anime data in R

## What is a Data Engineer?

Now this isn’t an article about the battle of Data Engineers vs Data Scientists, there’s no beef here. Instead this article comes off the back of the sea of articles I’ve seen recently talking about this exact point: that 80% of a Data Scientists work is data preparation and cleansing. So I’m going to talk … Read more What is a Data Engineer?

## How I Found My First Job in Data Analytics

Tips, tricks, mindset and more! Author’s Note: This post was originally posted on the 2nd of July 2018 and has been reposed here after I shut down the domain. For as long as I can remember, I have always been anxious about whether I would be able to find a job. While many people might not … Read more How I Found My First Job in Data Analytics

## My RStudio Configuration

Whenever I need to install RStudio on a new machine, I have to think a bit about the configuration options I’ve tweaked. Invariably, I miss a checkbox that leaves me with slightly different RStudio behavior on each system. This post includes screenshots of my RStudio configuration and custom keyboard shortcuts for RStudio 1.3, MacOS, so … Read more My RStudio Configuration

## Data Analysis: predicting the housing market using Python

Home sales in the second half of 2018 and the first half of 2019 by bedroom size What do the sold homes tell us? I use Python to calculate the numbers of bedrooms and sold price so as to observe any relationship between the number and price. I came up with three numbers for the sold … Read more Data Analysis: predicting the housing market using Python

## Role of Machine Learning in redefining Retail Banking

Banking industry is going through a transformational journey with the comprehensive usage of Advanced Analytics algorithms in day to day business of core banking. Customer acquisition through various channels, existing customer engagement, predicting defaulters on credit card or loan applications etc are few of the areas where analytics is doing a tremendous job. I will … Read more Role of Machine Learning in redefining Retail Banking

## End-to-end learning, the (almost) every purpose ML method

Can E2E be used to solve every Machine Learning problems? Photo by Su San Lee on Unsplash One of the most important skills for those who work with Machine Learning is to know which method is the right choice for a given problem. Some choices are trivial (e.g. supervised or unsupervised, regression or classification), because they … Read more End-to-end learning, the (almost) every purpose ML method

## Why you should Double-DIP for Natural Image Decomposition

“Double-DIP”: Unsupervised Image Decomposition via Coupled Deep-Image-Priors The key aspect of Double-DIP is inherent in the fact that the distribution of small patches within each decomposed layer is “simpler” (more uniform) than in the original mixed image. Let’s simplify it with an example; Let’s Observe the illustrative example in Figure 3a. Two different textures, X … Read more Why you should Double-DIP for Natural Image Decomposition

## K-Means Clustering with scikit-learn

Fundamentals of K-Means Clustering As we will see, the k-means algorithm is extremely easy to implement and is also computationally very efficient compared to other clustering algorithms, which might explain its popularity. The k-means algorithm belongs to the category of prototype-based clustering. Prototype-based clustering means that each cluster is represented by a prototype, which can … Read more K-Means Clustering with scikit-learn

## What is machine learning and deep learning?

A series of the Fundamentals of Machine Learning and Deep Learning The best introduction ever that you can get about machine learning and deep learning. (extracted from here) During this series, will be provided links where you can find more information about the subjects exposed. Feel free to explore during or after the reading. I was searching … Read more What is machine learning and deep learning?

## How to start a new package with testing in R

# Navigate where you want your folder to be locatedsetwd(“C:/Users/chief/Documents/Github”)# Assumes usethis is installedusethis::create_package(“foo”)# Say yes or no to next (annoying) popup window, it doesn’t matter.# Add a test environmentsetwd(“foo”)usethis::use_testthat()# Add first test function to at least get something in that folder.# Go to foo\tests\testthat# and add this file.context(“foo”)library(foo)test_that(“I’m testing something”, {  # do something … Read more How to start a new package with testing in R

## More Bayes and multiple comparisons

In my lastpostI had a little fun comparing perspectives among Bayesian, frequentist andprogrammer methodologies. I took a nice post from AnindyaMozumdarfrom the R Bloggers feed and investigated theworld’s fastest man. I’ve found that in writing these posts two things alwayshappen. I learn a lot, and I have follow-on questions or thoughts. This time is noexception, … Read more More Bayes and multiple comparisons

## An Introduction to Virtual Adversarial Training

Virtual Adversarial Training is an effective regularization technique which has given good results in supervised learning, semi-supervised learning, and unsupervised clustering. This is a re-post of the original post: https://divamgupta.com/unsupervised-learning/semi-supervised-learning/2019/05/31/introduction-to-virtual-adversarial-training.html Get the source code used in this post from here Virtual adversarial training has been used for: Improving supervised learning performance Semi-supervised learning Deep unsupervised … Read more An Introduction to Virtual Adversarial Training

## Making a DotA2 Bot Using ML

The bot roster Problem In December of 2018, the creators of AI Sports gave a presentation and introduced the DotA2 AI Competition to the school. DotA (Defense of the Ancients) is a game played by two teams, each consisting of five players who can choose from over one hundred different heroes. The goal of the game … Read more Making a DotA2 Bot Using ML

## 78th #TokyoR Meetup Roundup!

With the arrival of summer, another TokyoR UserMeetup! On May 25th, useRsfrom all over Tokyo (and some even from further afield – including KanNishida of Exploratory, all the way fromCalifornia!) flocked to Jimbocho, Tokyo for another jam-packed sessionof R hosted by Mitsui Sumitomo InsuranceGroup. Like my previous round up posts (for TokyoR#76 andTokyoR #77) I … Read more 78th #TokyoR Meetup Roundup!

## A Beginner’s Guide to Word Embedding with Gensim Word2Vec Model

1. Introduction of Word2vec Word2vec is one of the most popular technique to learn word embeddings using a two-layer neural network. Its input is a text corpus and its output is a set of vectors. Word embedding via word2vec can make natural language computer-readable, then further implementation of mathematical operations on words can be used to … Read more A Beginner’s Guide to Word Embedding with Gensim Word2Vec Model

## How to Become a Data Scientist

This question and its variations are the most searched topics on Google. As a practicing datascience professional, and manager to boot, dozens of people ask me this question every week. This post is my honest and detailed answer. Step 1 – Coding & ML skills You need to master programming in either R or Python. … Read more How to Become a Data Scientist

## Creating Azure Logic Apps from R using httr

Logic Apps is a serverless framework in Azure quite similar to IFTTT (if this, then that) and Zapier that allows you to connect different services and create workflows. You can define different types of triggers based on: time and events (e.g. http requests, messages received, …) to start workflows. Logic Apps can be created using a … Read more Creating Azure Logic Apps from R using httr

## Hands on Graph Neural Networks with PyTorch & PyTorch Geometric

In my last article, I introduced the concept of Graph Neural Network (GNN) and some recent advancements of it. Since this topic is getting seriously hyped up, I decided to make this tutorial on how to easily implement your Graph Neural Network in your project. You will learn how to construct your own GNN with … Read more Hands on Graph Neural Networks with PyTorch & PyTorch Geometric

## Reinventing Personalization For Customer Experience

Why? What? How? Atif M.BlockedUnblockFollowFollowing May 30 “Remember that a person’s name is, to that person, the sweetest and most important sound in any language.” — Dale Carnegie, How to Win Friends and Influence People When it comes to building good relationships with customers, learning their names is an essential step for businesses at any level. Consumers expect … Read more Reinventing Personalization For Customer Experience

## How to use ggplot2 in Python

Introduction Thanks to its strict implementation of the grammar of graphics, ggplot2 provides an extremely intuitive and consistent way of plotting your data. Not only does ggplot2’s approach to plotting ensure that each plot comprises certain basic elements but it also simplifies the readability of your code to a great extent. However, if you are … Read more How to use ggplot2 in Python

## Introduction to Latent Matrix Factorization Recommender Systems

Latent Factors are “Hidden Factors” unseen in the data set. Lets use their power. Image URL: https://www.3dmgame.com/games/darknet/tu/ Latent Matrix Factorization is an incredibly powerful method to use when creating a Recommender System. Ever since Latent Matrix Factorization was shown to outperform other recommendation methods in the Netflix Recommendation contest, its been a cornerstone in building … Read more Introduction to Latent Matrix Factorization Recommender Systems

## How to Teach Code

Part 2 — Lecturing teaches nothing, Make the complex simple Common Mistakes A teacher will commonly like to show students everything they need to ever know about a concept so they can kick off and be a pro. This could be an hour lecture. Computer scientists (after learning C) can handle that. Code newbies can’t. After the first … Read more How to Teach Code

## Which 2020 Candidate is the Best at Twitter?

A Data Analysis of the 2020 Democratic Candidate Twitter Accounts Photo by George Pagan III on Unsplash The contest for the 2020 Democratic party nomination will be fought in many arenas. Before the first debates in a month, before the campaign rallies in key states, and even before prime time TV interviews, the fight for the nomination … Read more Which 2020 Candidate is the Best at Twitter?

## An Easy Introduction to SQL for Data Scientists

SQL (Structured Query Language) is a standardised programming language designed for data storage and management. It allows one to create, parse, and manipulate data fast and easy. With the AI-hype of recent years, technology companies serving all kinds of industries have been forced to become more data driven. When a company that serves thousands of … Read more An Easy Introduction to SQL for Data Scientists

## A Step-by-Step Implementation of Gradient Descent and Backpropagation

One example of building a neural network from scratch The original intention behind this post was merely me brushing upon mathematics in neural network, as I like to be well versed in the inner workings of algorithms and get to the essence of things. I then think I might as well put together a story rather … Read more A Step-by-Step Implementation of Gradient Descent and Backpropagation

## Databricks: How to Save Files in CSV on Your Local Computer

3. Download the CSV file on your local computer In order to download the CSV file located in DBFS FileStore on your local computer, you will have to change the highlighted URL to the following: https://westeurope.azuredatabricks.net/files/df/Sample.csv/part-00000-tid-8365188928461432060–63d7293d-3b02–43ff-b461-edd732f9e06e-4704-c000.csv?o=3847738880082577 As you noticed, the CSV path in bold (df/Sample.csv/part-00000-tid-8365188928461432060–63d7293d-3b02–43ff-b461-edd732f9e06e-4704-c000.csv) is from step 2. The number (3847738880082577) is from the original … Read more Databricks: How to Save Files in CSV on Your Local Computer