You have a distance sensor HC-SR04 and a series of distance observations, assuming the target does not move you want to establish the best or most correct measure. The particular sensor used is a HC-SR04, of which an analysis of the accuracy and performances is presented here: in the analysis, as I do not have any specific …
Geo-visualizations are a powerful tool to understand the world. Thanks to Michael Cooper I came across this article. The visualization had been created by JimWillFixIt69, on a reddit.com forum and is very popular, mentioned and linked from many other sites. Here it is: It shows, for each European Country, which is the second biggest Nationality …
Update: The content of this article is no longer applicable for this tablet model. Termux and Jupyter Notebook still work, however Termux does no longer support (for a long time) Android 6.0 and older. The result is that crucial libraries like Matplotlib fail to install. It is still usable but only for basic tasks. …
I have played a bit with shiny. The RStudio folks provides the possibility of deploying R “Shiny” applications on their server. The final result which will look a lot like this: https://<YourAccount>.shinyapps.io/<YourApp>. There are several plans for this type of deployment, including one that allows you to deploy up to 5 applications for free. You …
Ok, this is not Data Science. This is just for fun. I have to admit, I tend to mix up things. Here I am mixing up the German class I am taking with one of the visualizations that I prefer, the wordcloud. Not because it conveys a message about data, in this case is just …
I have a new idol. When I discovered this web site, thanks to the referral in the “Getting and Cleaning Data” MOOC on Coursera, little did I know about the gapminder.org web site, about Professor Hans Rosling from Sweden and his work as a Statistician and Global Health expert. But what really is gapminder.org? In …
When producing a plot using Python and matplotlib for publishing purposes, or to submit it as part of a report or for any professional use, some questions come to mind that not usually explained in one easy to retrieve place. True, everything is in the matplotlib documentation or can be easily found on stackoverflow. But …
The Data Visualization MOCC started on Coursera on July 20 2015. This course is part of the Data Mining Specialization of the University of Illinois Urbana-Champaign. The course is taught by Prof. John C. Hart and it is not centred on programming, although this is not discouraged. Several resources and references are presented throughout the …
Dante Alighieri and the wordcloud from his “Divine Comedy” What if you want to scrape a web page in a language other than English and generate the wordcloud from the page as I explained in my previous post. There is something missing, as you will find out. The STOPWORDS used in that example will not …
This article has the objective of scraping a web site with the purpose of generating a wordcloud out of its text. The wordcould visualization of text is something that is becoming more and more popular, and you find it more and more also in common TV shows, where some presenters have had the idea to …