Installing R gWidgets2Qt package

I encountered some problems to install this package in R, because it is only available on github.

Here I report some main steps usefull to this aim.

On Ubuntu using Synaptic, or apt-get, install:
1. cmake command
2. libqt4_dev (for the actual version of gWidget2Qt the version 4 of Qt is needed)

In R console give the following commands:

install.packages(c('qtbase', 'qtutils'))
install.packages('devtools')
library(devtools)
install_github('gWidgets2Qt','jverzani')

To use the Qt libraries through the gWidgets2 GUI package you need to include in your R project:

require(gWidgets2)
options(guiToolkit="Qt")

After that all the gWidgets components you will declare will be visualized using Qt libraries, hoping that the gWidgets2Qt library is in a final version.

N.B. All gWidgets components have the guiToolkit parameter, giving the possibility to use another toolkit (f.i. RGtk2) for some component in the code, but this is not recommended.

Learn LateX and take it apart – Article useful commands for newbies

LateX is a great typesetting system and everytime i use it, i learn something new.
This time i’ve used the TexMaker editor, i’ll never change it! 😛

Some useful commands to use in an article are:

In the header…

%declare the article document package, with a4paper and 11pt arguments
\documentclass[a4paper,11pt]{article}

%The font econding package with T1 as argument
\usepackage[T1]{fontenc}

%the input encoding package with utf8 enables you to write accented letters as è à
\usepackage[utf8]{inputenc}

%I don’t know wtf this package do! -.-‘
\usepackage{lmodern}

%Babel package with italian argument enables to use italian language, but as reported in the
%link: “A doc­u­ment may se­lect a sin­gle lan­guage to be sup­ported, or it may se­lect sev­eral, in which case the doc­u­ment may switch from one lan­guage to an­other in a va­ri­ety of ways.”
\usepackage[italian]{babel}

%Pxfons, are Palatino fonts, i like them very much! Here some fonts combination ideas, in italian…
\usepackage{pxfonts}

%Enables three types of interline spacing
\usepackage{setspace}

%Enables includegraphics command for images
\usepackage{graphicx}

%Enables a list of companion fonts… read documentation… -.-‘
\usepackage{textcomp}

%hyperref makes your index, and other references as URLS or notes, linkable!
\usepackage{hyperref}%utile per inserire l’indice clickabile
%useful to set some options for hyperref package
%here enables coloured links with colour blue
%if doesn’t set, a box around all links will be visible!
\hypersetup{colorlinks=true, linkcolor=blue}

%Enables \ref{lbl} and \vref{lbl} cmds. In the second case, it links on page where the lbl is, useful for floating images
\usepackage[italian]{varioref}

%Enables small fonts in caption command, hang argument indent text under the label.
\usepackage[font=small, hang]{caption}

%You can set a date, if empty, no date will be printed with \maketitle command
\date{}

In the document…

%useful for a coverpage or every page without page-numbering
\thispagestyle{empty}

%restarts numbering, in this case with arabic numbers, there are many other numbering types
\cleardoublepage
\pagenumbering{arabic}

%To create a section
\section{name}

%to create a subsection, try to guess…
\subsection{name}

%to create a subsubsection… ^^
\subsubsection{name}

%cite the number of bibitem you want
\cite{biblabel}

%Enters the “bib refs” in the index.
%If you dont’ enter it, index will not have it
\addcontentsline{toc}{section}{bib refs}

%A bibliography template, someone says that it’s not good, i liked it! 🙂
\begin{thebibliography}{widest entry}

\bibitem[#]{biblabel} auth (year) – title – source

\end{thebibliography}

Linux App Finder

If you are searching for a Linux application, but you don’t know if it exists or if you are searching for a Linux alternative for a Windows application, Linux App Finder is what you need 🙂

Here the Alternatives pages! 🙂

Mirage – Image viewer (with crop!!!)

If you need a light and easy image viewer under unix… With crop funtion too… don’t hesitate, use Mirage!

The flaw is the buttons scarsity in the bar and the minimal window for cropping!

Oh ACDSee… how much i loved you! (The only one good Windows Software)

Gimp & empty geometric shape creation

It is widely believed that Gimp isn’t good to create geometric shapes.

That’s not true!

Gimp is a really good image editor and creator, and is easy to use.

You can exercise yourself on Gimp site! It’s plenty of tutorials!

Let’s start…

How to know your library version

In a debian-derived linux distribution, under shell you can type

dpkg -l | grep nomelib

Apple Remote Controller (un)l(ock)imitation

a good mac app to unlock the apple remote controller limitation is remote buddy…

Site Block Extensions

Because i’m addicted to facebook and other sites, but i need to work/study, i’ve installed two extensions in my web browsers that lock me to visit these sites…

Chrome extension:
Nanny please scold me when i lost my precious time!

Firefox extension:

Reversing a C++ string

We always search for a method to reverse a string of std:string class in C++…

So, i’ve found the method on cplusplus forum, it’s really very simple:

string str=”something”;
str= string ( str.rbegin(), str.rend() );

My broken iPhone 3G personalization

Today i was thinking about my old 3G, lying in a drawer because broken, and i came to the conclusion that i could use it as music player and other useful daily utilities, but when i revived it, it was slow and not so useful…

So i decided to search about something that helps me to improve my phone speed, so founding Whited00r. An italian project developed to install an “iOS6 like” system on old unsupported devices.

The site offers a guide for installation…