2016

Over 50 practical recipes for data analysis with R in one book 2016/05/11

Ah, writing a blog post! This is a pleasure I was forgetting, and you can guess it looking at last post date of publication: it was around january... you may be wondering: what have you done along this long time? Well, quite a lot indeed: changed my job ( I am now working @ Intesa Sanpaolo Banking Group on Basel III statistical models) became dad for the third time (and if you are guessing, it’s a boy!

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2015

How to add a live chat to your Shiny app 2015/05/11

As I am currently working on a Fraud Analytics Web Application based on Shiny (currently on beta version, more later on this blog) I found myself asking: wouldn’t be great to add live chat support to my Web Application visitors? It would indeed! [caption id=“attachment_490” align=“aligncenter” width=“200”] an ancient example of chatting - Camera degli Sposi, Andrea Mantegna 1465 -1474[/caption] But how to do it? Unfortunately, looking on Google didn’t give any useful result.

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How to list file and folders within a folder ( basic file app) 2015/04/01

I know, we are not talking about analytics and no, this is not going to set me as a great data scientist… By the way: have you ever wondered how to list all files and folders within a root folder just hitting a button? I have been looking for something like that quite a lot of times, for instance when asked to write down an index of all the working papers pertaining to a specific audit ( yes, **I am an auditor, **sorry about that): really time-consuming and not really value-adding activity.

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2014

How to use Github with Rstudio : step-by-step tutorial 2014/12/28

Pushing to my Github repository directly from the Rstudio project, avoiding that annoying “copy & paste” job. Since it is one of Best Practices for Scientific Computing, I have been struggling for a while with this problem. Now that I managed to solve the problem, I think you may find useful the detailed tutorial that follows. I am not going to explain you the reason why you should use Github with your Rstudio project, but if you are asking this to yourself, you may find useful a Stack Overflow discussion on the topic.

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download data to excel from web 2014/10/28

This simple tutorial will show you how to download data into an excel spreadsheet, creating a web query. Download data into excel select ”data” tab select ”from web”  input the desidered web URL click ”go” button **select **data you want to download click ”import” button Refresh downloaded data select ”data” tab select “connections” select your connection click “refresh” button

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How to Put Equations into Evernote 2014/09/11

Problem If you have to put some math writing into your Evernote notes, and you have a Mac device, there is a very simple way to solve your problem out. Solution This way is called Grapher, a built-in application for visualising math stuffs. Tutorial Here below a simple tutorial: 1. find Grapher among your applications. You can either search for it within Spotlight or using the launchpad. 2. write the equation you would like to put into your Evernote note.

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Code snippet: subsetting data frame in R by vector 2014/09/02

Problem: you haveto subset a data frame using as criteria the exact match of a vector content. for instance: you have a dataset with some attributes, and you have a vector with some values of one of the attributes. You want to make a filter based on the values in the vector. Example: sales records, each record is a deal. The vector is a list of selected customers you are interested in.

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Saturation with Parallel Computation in R 2014/07/28

I have just saturated all my PC: full is the 4gb RAM and so is the CPU (I7 4770 @3.4 GHZ) Parallel Computation in R which is my secret? the doParallel package for R on mac The package lets you make some very useful parallel computation, giving you the possibility to use all the potentiality of your CPU. As a matter of fact, the standard R option is to use just on of the cores you have got on your PC.

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