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!

tags: ///////////////

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.

tags: ////////

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.

tags: ////

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.

tags: ////

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

tags: /////

How to Put Equations into Evernote 2014/09/11

Problem Solution Tutorial 1. find Grapher among your applications 2. write the equation 3. copy the equation as TIFF 4. paste the equation into Evernote other ways to insert equations into evernote Problem Some time ago I was looking for an easy way to put some math writing within my Evernote notes trough my Mac device. Even if there is no official solution to the problem and the feature request is still pending within Evernote dedicated forum, I finally came out with a very simple way to solve your problem out.

tags: //

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.

tags: ////

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.

tags: ////