535 search results for "boxplot"

Does money buy happiness after all? Machine Learning with One Rule

April 22, 2017
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Does money buy happiness after all? Machine Learning with One Rule

This week, I am exploring Holger K. von Jouanne-Diedrich’s OneR package for machine learning. I am running an example analysis on world happiness data and compare the results with other machine learning models (decision trees, random forest, gradient...

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Data science for Doctors: Inferential Statistics Exercises(Part-5)

April 16, 2017
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Data science for Doctors: Inferential Statistics Exercises(Part-5)

Data science enhances people’s decision making. Doctors and researchers are making critical decisions every day. Therefore, it is absolutely necessary for those people to have some basic knowledge of data science. This series aims to help people that are around medical field to enhance their data science skills. We will work with a health related Related exercise sets:

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Impact of omitted variables on estimating causal effects – simulations

April 14, 2017
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Impact of omitted variables on estimating causal effects – simulations

The story so far Last week I looked at a few related methods of investigating causality with observational data, where the treatment is expected to be received by observational units (people or firms)… in a way that is structurally related to ...

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Mapping waxwings annual migration without Twitter

April 7, 2017
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Mapping waxwings annual migration without Twitter

Recently a reader left a comment on this blog mentioning his cool blog post in which he mapped the spread of a migratory bird using Twitter. His data source was the Waxwings UK account which reports sightings of Bohemian waxwings in the UK. I decided t...

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Data Visualization – Part 3

April 7, 2017
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Data Visualization – Part 3

What Type of Data Visualization Do You Choose (if any)? Determining whether or not you need a visualization is step one. While it seems silly, this is probably something everyone (including myself) should be doing more often. A lot of times, it seems like a great way to showcase the amount of work you have

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Perform pairwise Wilcoxon test, classify groups by significance and plot results

March 25, 2017
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Perform pairwise Wilcoxon test, classify groups by significance and plot results

This post is the result of work performed in collaboration with my colleague Eleonora Paparelli (who actually did most of the work!). We wanted to compare several distributions using Wilcoxon test and summarize results (i.e. indicate the comparisons showing significant differences). R base includes pairwise.wilcox.test to perform Wilcoxon rank sum test between all pairs of

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Plotly for R workshop at Plotcon 2017

March 15, 2017
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Carson Sievert, the lead developer of the Plotly package for R will be hosting a workshop at https://plotcon.plot.ly/. Here’s an outline of the material he will be covering during the workshop. More details here. The workshop will be based on Carson’s Plotly for R book. Broad Topic Details A tale of 2 interfaces Converting ggplot2

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Employee Retention with R Based Data Science Accelerator

March 9, 2017
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Employee Retention with R Based Data Science Accelerator

by Le Zhang (Data Scientist, Microsoft) and Graham Williams (Director of Data Science, Microsoft) Employee retention has been and will continue to be one of the biggest challenges of a company. While classical tactics such as promotion, competitive perks, etc. are practiced as ways to retain employees, it is now a hot trend to rely on machine learning technology...

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Can we predict stock prices with Prophet?

March 5, 2017
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Can we predict stock prices with Prophet?

- Facebook recently released a API package allowing access to its forecasting model called prophet. According to the underling post: It's not your traditional ARIMA-style time series model. It's closer in spirit to a Bayesian-...

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A glance at R-bloggers Twitter feed

February 27, 2017
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A glance at R-bloggers Twitter feed

It’s the second time I write a post about the blog aggregator R-bloggers, probably because I’m all about R blogs now that I have one. My husband says my posts are so meta. My first post was about R blogs names, in this one I shall focus on the last...

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