Data Posts

Thoughts on validating model accuracy  -  2 Jul, 2021 (data)

The MIBE principles

Supervised and Unsupervised ML interplay  - 18 May, 2021 (data)

Better Accuracy in Supervised & Dimensionality reduction

Statistical Significance test using Permutation  - 17 Mar, 2021 (data, montecarlo)

Statistical Significance test using Permutation

Evolution of metrics for the social media era  - 18 Feb, 2021 (data)

Evolution of metrics for the social media era

Diff Patterns for Root Cause Analysis  - 18 Feb, 2021 (data)

Diff Patterns function python function in the T library

Precision, Recall and the Fbeta-measure  -  6 Aug, 2020 (data)

Precision, Recall and the Fbeta-measure

Mental Models  - 16 Jul, 2020 (mental models)

Mental Models

OKRs - Objectives and Key Results  -  6 Jul, 2020 (data)

objectives and key results

Lump sum versus dollar-cost average investing  - 11 Jun, 2020 (data)

Lump sum versus dollar-cost average investing

Trading Backtesting function  - 10 Jun, 2020 (data)

Trading Backtesting python function in the T library

T is for Table  -  8 Jun, 2020 (data)

Python table manipulation library

The Car Model of Self-Actualization  -  4 Aug, 2018 (life)

The Car Model of Self-Actualization

Cohorts Machine  - 11 Jun, 2018 (data)

Cohorts Machine

A Model of Human Development  - 19 May, 2018 (life)

A Model of Human Development

Statistical Significance  - 16 May, 2018 (data)

Statistical Significance

Social Network Analysis  - 19 Apr, 2018 (data)

Social Network Analysis

Principles  - 22 Oct, 2017 (life)

Principles

Regular Business Reporting  - 21 Oct, 2017 (data)

Regular Business Reporting

Fame, Fortune and Machiavelli  - 13 Mar, 2017 (life)

Fame, Fortune and Machiavelli

Posts by Tag  - 12 Mar, 2017 ()

User Retention and the Aha! moment  - 13 Apr, 2016 (data)

User Retention and the Aha! moment

Setting Goals, Planning and Executing  -  7 Mar, 2016 (data)

Setting Goals, Planning and Executing

User Lifecycle Analytics Framework  -  2 Mar, 2016 (data)

User Lifecycle Analytics Framework

Testing an Hypothesis  -  1 Mar, 2016 (data)

Testing an Hypothesis

Impact Evaluation  - 15 Feb, 2016 (data)

Impact Evaluation

Government should do AB testing  - 19 Jan, 2016 (data, idea)

Government should do AB testing

Data Granularity  - 19 Jan, 2016 (data, idea)

Data Granularity

Food Recipes  -  5 Jan, 2016 ()

Duplication (a.k.a. overcounting) in Segmented data  - 15 Nov, 2015 (data)

Duplication (a.k.a. overcounting) in Segmented data

Data Science in a Business  - 15 Nov, 2015 (data)

Data Science in a Business

Data in a Business  -  1 Nov, 2015 (data)

The data analyst role inside a business.

Data Dashboard in Practice  - 25 Oct, 2015 (data)

Guidelines and tips for building Data Dashboards

Users Flow Diagrams  - 19 Jul, 2015 (data, visualization)

Users Flow Diagrams

Facts Anchors  - 19 Jul, 2015 (data)

Facts Anchors

Clickstream Analysis  - 19 Jul, 2015 (data, clistream)

Clickstream Analysis

A/B test with Clickstream data  - 16 Jul, 2015 (data, ab-testing)

A/B test with Clickstream data

Trended Funnel  - 15 Jul, 2015 ()

Time in PC  - 15 Jul, 2015 (data, project)

DYI Time in PC tracker

Data Quality Control  - 15 Jul, 2015 (data)

Data Quality Control

Behavioral Science Nudges  - 15 Jul, 2015 (life)

Behavioral Science Nudges

The Average of Averages is a No No  - 15 Jul, 2015 (data, statistics)

The Average of Averages is a No No

Excel Macros  - 19 May, 2015 (project, data)

Excel Macros

Data Tracking and Collection  - 14 Oct, 2014 (data)

A description of the collection of methods used to track and collect data for analysis

Data Analysis Skill Set  -  7 Oct, 2014 (data)

Skill Set of an Data Analyst

Data Analysis Mindset  - 30 Jul, 2014 (data)

Getting into the Data Analysis Mindset

Segment, segment, segment  - 15 Jul, 2014 (data)

Segment, segment, segment

Guitar Tools in Excel  - 15 Jul, 2014 (music, project)

Guitar Tools in Excel

Statistical Tools in Excel  -  3 Jul, 2014 (data, project)

Statistical Tools in Excel

Storytelling and Presenting  - 26 Jun, 2014 (data, presenting)

Structured Presenting and Storytelling

Arguments, tools and patterns of reasoning  - 25 Jun, 2014 (data, arguments)

Arguments, tools and patterns of reasoning

Relative to (instead of) Absolute  - 24 Jun, 2014 (data)

Relative to (instead of) Absolute

Data Analysis Process  - 24 Jun, 2014 (data, arguments)

The Data Analysis (Structured) Process

Music Recording Cookbook  -  3 Jun, 2014 (music, guitar)

Music Recording Cookbook

Data Analysis Techniques  -  8 Apr, 2014 (statistics, data)

Data Analysis Techniques And Tools

Web Analytics Dictionary  -  2 Mar, 2014 (web analytics, python, data, project)

Web Analytics Dictionary

Goals Implementation Plan  - 17 Feb, 2014 (learning, life)

day to day practical implementation of goals

Game of Life  -  9 Feb, 2014 (learning, life)

If you see life as a game, then maybe you can use strategic thinking to optimize it.

Understanding People  - 10 Jan, 2014 (learning, life)

Understanding People

Music Production  -  1 Dec, 2013 (learning, music, guitar)

Music Production

Favorite Talks  - 26 Jul, 2013 (learning, life)

Talks, presentations that i found very interesting

Product and Application Design  - 25 Jul, 2013 (product, application, startup, project)

How to Create a new software product

Data Visualization and Presentation techniques  - 20 Jun, 2013 (statistics, data)

Techniques for telling Stories with Data.

Programming  - 10 Apr, 2013 (programming, project)

Programming Best Practices

Data Analysis Introduction  - 25 Mar, 2013 (statistics, data)

Data Analysis Introduction

Work, Productivity and Tools  - 15 Mar, 2013 (productivity, life)

General rules for work, being productive and tools

Health, Food & Exercise  - 11 Mar, 2013 (health, life)

Health, Food & Exercise Guidelines

Meta Learning  -  7 Mar, 2013 (learning, life)

learning how to learn

Javascript Bookmark Scripts  -  5 Dec, 2012 (javascript, project)

Create and share little javascript scripts that augment/improve the pages you look at.

Data Processing Techniques  -  9 Nov, 2012 (data, statistics)

Reference of techniques that help in data processing, filtering, splitting, etc

Confluence automation  -  2 Apr, 2012 (ruby, automation, project)

Script to automate updating content of a confluence wiki, both page content and page attachments

How to get into the Semantic Web  - 11 Jan, 2012 (data, semanticweb)

Practical examples on tagging up a site with RDFa tags, then extract and use the semantic web data

Data, Data, Data!  - 18 Dec, 2011 (data, semanticweb, idea)

A view on a data driven future and the need for the semantic web

Table.query  - 14 Oct, 2011 (data, ruby, SQL, project)

A small ruby class inspired by R’s sqldf

Monitoring Productivity II - the Others  - 30 Sep, 2011 (data, productivity, statistics, R, project)

In previous Monitoring Productivity Experiment I looked into the hours I spent in computer, now I look into the hours others spend in computer, which is far ...

Dashboards Toolkit  - 24 May, 2011 (data, visualization, ruby, dashboard, javascript, project)

An important part of being data driven is to have a daily feedback on data, here’s a couple of automated dashboards i’ve built recently

Who Chats the Most?  - 28 Apr, 2011 (data, visualization, statistics, ruby, project)

From my Skype chat history, a visualization of the counts of chats by (anonymised) user

Machine Learning Ex5.2 - Regularized Logistic Regression  - 20 Mar, 2011 (machinelearning, R, statistics, project, data)

Improves the Logistic Regression implementation done in Ex4 by adding a regularization parameter that reduces the problem of over-fitting. Using Newton’s Met...

Machine Learning Ex5.1 - Regularized Linear Regression  - 18 Mar, 2011 (machinelearning, R, statistics, project, data)

Improves the Linear Regression implementation done in Ex3 by adding a regularization parameter that reduces the problem of over-fitting

Machine Learning Ex4 - Logistic Regression  - 16 Mar, 2011 (machinelearning, R, statistics, project, data)

Implementing Logistic Regression using Newton’s Method, on a classification problem

Machine Learning Ex3 - Multivariate Linear Regression  -  8 Mar, 2011 (machinelearning, R, statistics, project, data)

Implementation using the normal equations instead of the gradient descent algorithm

Machine Learning Ex2 - Linear Regression  - 24 Feb, 2011 (machinelearning, R, project)

Implementation using gradient descent

Weight Loss Predictor  -  5 Feb, 2011 (data, R, health, montecarlo, statistics, visualization)

Diet and Predicting when I am going to be healthy

On Tools. Featuring guitar pedals, cattle growing and math  - 12 Jan, 2011 (tools, life)

A story about focusing on the right things and the importance of tools

Homemade Auto-Updater  -  1 Dec, 2010 (automation, emacs, project)

Script to update an application to the last version. It automates the process of downloading and installing the app

Monitoring Productivity Experiment  - 20 Oct, 2010 (data, productivity, statistics, visualization, emacs, R)

Looking at time spent in computer and how much of it is actually productive

How to download videolectures.net videos with VLC  -  8 Aug, 2010 (automation, project)

videolectures.net has very good content, here’s a way to download its videos

Clojure and Selenium part ii - cov3  - 22 May, 2010 (automation, clojure, webcrawler, project)

A selenium 2 based web crawler library called cov3, in clojure

jQuery Twitter ‘mini’ plugin  - 10 Apr, 2010 (javascript, project)

A jQuery plugin for displaying a twitter feed into a web page

AB testing tools in the Future  - 16 Mar, 2010 (data, abtesting, idea)

A view on AB testing tools of the future

Automating todo tasks reports with org-mode  -  8 Mar, 2010 (automation, ruby, emacs, project)

Automating reports from my (emacs org-mode)TODO list

Probability simulation of basketball throws  - 27 Aug, 2009 (montecarlo, statistics, clojure, data)

A probability simulation from the book Resampling: The New Statistics, using Clojure and Incanter

Clojure test-is results in twitter  - 15 May, 2009 (automation, clojure, project)

Have your clojure test-is results posted on twitter automatically as they run

Clojure and Selenium  - 24 Apr, 2009 (automation, clojure, webcrawler, project)

I needed a crawler to go around a list of pages, invoke some javascript(tests) and collect the output

Lem-E-Tweakit and Logic programming  -  2 Feb, 2009 (project)

Prolog vs SQL

Why my keyboard has a QWERTY layout?  - 21 Jan, 2009 (abtesting, keyboard, idea, life)

Keyboard layout design and optimization ideas

Photo organizer  - 25 Nov, 2008 (automation, ruby, python, project)

Script to organize pictures into folders by the day they were taken

Stock Price Alert  - 31 Jul, 2008 (automation, ruby, project)

Waiting for a stock price to rise to a certain value to sell it? or waiting for the price to drop to a certain value to buy it? But don’t want to be checking...

Ebay Misspells Search  - 27 Jun, 2008 (automation, ruby, project)

a script that given an ebay search term, creates misspells alternatives and then executes an (ebay)search. because sometimes great bargains can be found from...

Funds ‘R’ US  - 12 Feb, 2008 (life)

Is it only me, or is a bit annoying that every year around Christmas, Birthday’s, etc, we all have to go and find some gift and more often than none ends up ...

Big Brother Google  - 18 Jan, 2008 (life)

Google, data nirvana and grandmother’s birthday

Visualizing Data, with Processing and JRuby  - 14 Jan, 2008 (data, project, visualization, statistics, ruby)

A data visualization experiment, including a mini data warehouse, to visualize amount of vegetarians around the word

Marketing Email machine  -  1 Dec, 2007 (project, ruby, jruby, clojure)

Marketing Email machine