Articles by Manos Parzakonis

Basic A/B Testing plots and stats with R

January 12, 2014 | Manos Parzakonis

Have you used Google Analytics Content Experiments? I’ve been using it lately and the most useful thing is that all data are integrated into the API to do what you want to do except for the standard reports. So, you can get them into your favorite data analysis tool ...
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Google Analytics + R = FUN!

May 5, 2013 | Manos Parzakonis

The scope of this post it to show how simple it is to get data out of the Google Analytics and create your own reports (that you hope that they can be semi-automated at least) and you favourite statistical graphs (those that GA is currently missing). As you already know ...
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Download your Facebook photos using R

September 15, 2012 | Manos Parzakonis

So tonight I wanted to download all my Facebook pictures. For some reason the zip file was corrupted each of the 3 times I downloaded, so I remembered that some time ago I was playing around with an R project named Facebook Data-Mining. The project is conveniently located at github and ...
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A tiny RCurl headache ;)

July 4, 2012 | Manos Parzakonis

As more and more data go online (plus we love Google Drive) we are forced to connect to our data over the net. We mostly do this via RCurl (but we could do this using RGoogleDocs as well).In that case all that is required to get the data into ... [Read more...]

Book shoppin’…

November 24, 2011 | Manos Parzakonis

I honestly have no book on R programming. In fact I have not a single book on programming at all (my coding proves that ;x). I am pretty sure that I am gonna order (just did!) that book. You can get a look of Matloff’s text here (= pdf for ...
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Data is everywhere!

November 19, 2011 | Manos Parzakonis

I was writing earlier today that I am getting really fed to using the same datasets over and over again. Of course using the same data over time with different methods (eg look this) serves really well on a comparison scope but still we can use other data in a ...
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Bookshelf remodelling

August 18, 2010 | Manos Parzakonis

I found time and read Gelman and Hill’s “Data Analysis Using Regression and Multilevel / Hierarchical Models“…Now, please do yourself a favour and get it (of course the paperback version ). Even for experienced or intermediate (myself) this will be a treat for your eyes and neurons. PS : (Confession) I ... [Read more...]

Read a new book…

July 31, 2010 | Manos Parzakonis

From the book website : IPSUR stands for Introduction to Probability and Statistics Using R, ISBN: 978-0-557-24979-4, which is a textbook written for an undergraduate course in probability and statistics. The approximate prerequisites are two or three semesters of calculus and some linear algebra in a few places. ... [Read more...]

A robust Hotelling test…

July 12, 2010 | Manos Parzakonis

Recently I was in need of testing a mean vector. I wrote a few lines of code in R and had it done perfectly. Hotelling test is one of the least interesting test to me. never really figured out why… At that time I had some time to search more ... [Read more...]

What I need to know…

June 19, 2010 | Manos Parzakonis

is maps and geographical data representation in R. In case you’re curious too this is a good study material from R-Bloggers : maps ; geographical ; spatial Ok. This could be a tweet rather than a post… [Read more...]

lme4 stands 4 Linear mixed-effects…

February 19, 2010 | Manos Parzakonis

There is a certain hype about mixed (and random) effects among statistician and analysts. You can show some love to Douglas Bates and Martin Maechler for maintaing the lme4 package for our cupid, R I copy the entity of the information of the projects page. Doxygen documentation of the underlying ... [Read more...]

[Event] R / Finance 2010: Applied Finance with R

February 5, 2010 | Manos Parzakonis

One of the greatest event on R is under way… R / Finance 2010: Applied Finance with R April 16 & 17, Chicago, IL, US The second annual R / Finance conference for applied finance using R, the premier free software system for statistical computation and graphics, will be held this spring in Chicago, IL, USA ... [Read more...]

Start your engines; it’s a Linux era!

December 29, 2009 | Manos Parzakonis

Well, I’m writing this from my new system. After years on hiatus I migrated to Linux, once again. Setting up a full system on Linux for a Greek user had been one of the greatest challenges. First,of all setting up writing, reading & printing in Greek was the biggest ...
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R> if (done=TRUE) tweet me!

December 11, 2009 | Manos Parzakonis

Let’s say that you’re fitting a cumbersome model so time is not to waste over a PC staring at the screen half anxious-half bored… Then, you can always leave and go on with meetings and all your daily routine and have R notify you the results! How? We ... [Read more...]

Probability of hypercubes…

November 28, 2009 | Manos Parzakonis

…in R of course! There is a handy function to do those calculations. Normally (ahh!) you might resolve to a symbolic calculation package (Maple,Mathematica etc.)  but that is not the situation any more. The calculations are done with the mnormt package. Relevant functions exist in other packages as well (... [Read more...]
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