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R Install (Debian Jessie)


R release contained in the official Debian release will become outdated as time passes. The “stable” directory on CRAN contains so-called ‘backports’ of the current R binaries for the “stable” distribution of Debian.

1) Add this source to /etc/apt/sources.list:

deb http://cran.es.r-project.org/bin/linux/debian jessie-cran3/

2) Add keys for this font and update repository packages list

# apt-key adv --keyserver keys.gnupg.net --recv-key 381BA480
# apt-get update

3) Install R packages:

# apt-get install r-base r-base-dev

4) Run R:

# R

root@travelling:/home/ubeda# R

R version 3.2.0 (2015-04-16) -- "Full of Ingredients"
Copyright (C) 2015 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu (64-bit)

R es un software libre y viene sin GARANTIA ALGUNA.
Usted puede redistribuirlo bajo ciertas circunstancias.
Escriba 'license()' o 'licence()' para detalles de distribucion.

R es un proyecto colaborativo con muchos contribuyentes.
Escriba 'contributors()' para obtener más información y
'citation()' para saber cómo citar R o paquetes de R en publicaciones.

Escriba 'demo()' para demostraciones, 'help()' para el sistema on-line de ayuda,
o 'help.start()' para abrir el sistema de ayuda HTML con su navegador.
Escriba 'q()' para salir de R.

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Categories: BigData, R Tags:

Domingo, 7 de junio de 2015 Sin comentarios

Installing Cassandra 2.1 on Raspberry Pi


1. Download Oracle JDK8 for ARM on your RaspberryPi and get the resulting file to your ‘home’ folder on Raspbian:
http://www.oracle.com/technetwork/java/javase/downloads/jdk8-arm-downloads-2187472.html

2. UnTAR the file jdk-8u6-linux-arm-vfp-hflt.tar.gz:

# tar xvzf jdk-8u6-linux-arm-vfp-hflt.tar.gz -C /opt

3. Set default java and javac to the new installed JDK8.

# update-alternatives --install /usr/bin/java java /opt/jdk1.8.0_06/bin/java 1
# update-alternatives --install /usr/bin/javac javac /opt/jdk1.8.0_06/bin/javac 1
# update-alternatives --set java /opt/jdk1.8.0_06/bin/java
# update-alternatives --config javac
# update-alternatives --config java
# update-alternatives --display java

4. Now,  check that version 1.8 is really installed

# java -version

This order should return something similar to:

java version "1.8.0_06"
Java(TM) SE Runtime Environment (build 1.8.0_06-b23)
Java HotSpot(TM) Client VM (build 25.6-b23, mixed mode)

5. Export JAVA_HOME path variable:

# export JAVA_HOME="/opt/jdk1.8.0_06"
# export PATH=$PATH:$JAVA_HOME/bin

6. Now, it is time to download Apache Cassandra:
# wget http://mirror.reverse.net/pub/apache/cassandra/2.1.2/apache-cassandra-2.1.2-bin.tar.gz

7. UnTAR and move the main directory to /opt:

# tar -xvsf apache-cassandra-2.1.2-bin.tar.gz
# mv apache-cassandra-2.1.2 /opt/cassandra

8. Download and replace snappy-java:

# cd /opt/cassandra/lib
# mv snappy-java-1.0.5.2.jar snappy-java-1.0.5.2.jarX
# wget https://oss.sonatype.org/content/repositories/snapshots/org/xerial/snappy/snappy-java/1.1.1.7-SNAPSHOT/snappy-java-1.1.1.7-SNAPSHOT.jar

And now, launch Cassandra…
/opt/cassandra/bin/cassandra -f

You will know if cassandra is running succesfully if you are able to see the line:

 Listening for thrift clients...


Categories: BigData, Cassandra, Linux, Raspberry Pi Tags:

Miércoles, 31 de diciembre de 2014 Sin comentarios

IEEE Internet of Things Journal


The IEEE IoT Journal (IoT-J) is being launched in 2014. The initial papers have been posted in IEEE Xplore. The IEEE IoT-J publishes papers on the latest advances, as well as review articles, on the various aspects of IoT from open call and special issues. Topics will include IoT system architecture, IoT enabling technologies, IoT communication and networking protocols, IoT services and applications, and the social implications of IoT. Examples are IoT demands, impacts, and implications on sensors technologies, big data management, and future internet design for various IoT use cases, such as smart cities, smart environments, smart homes, etc. The fields of interest include:
IoT architectures such as things-centric, data-centric, service-centric architecture, CPS and SCADA platforms, future Internet design for IoT, cloud-based IoT, and system security and manageability.
IoT enabling technologies such as sensors, radio frequency identification, low power and energy harvesting, sensor networks, machine-type communication, resource-constrained networks, real-time systems, IoT data analytics, in situ processing, and embedded software.
IoT services, applications, standards, and test-beds such as streaming data management and mining platforms, service middleware, open service platform, semantic service management, security and privacy-preserving protocols, design examples of smart services and applications, and IoT application support.

Enlace: http://iot-journal.weebly.com/


Miércoles, 24 de septiembre de 2014 Sin comentarios

“Internet of Things and Cloud Computing” Journal



Internet of Things and Cloud Computing (IOTCC) provides a forum for sharing timely and up-to-date publication of scientific research and review articles. The journal publishes original full-length research papers in all areas related to the theory and application of the Internet of Things and Cloud Computing.It aims to bring together researchers and practitioners in all security aspects of cloud-centric and outsourced computing,as well as on software and hardware enabling technologies for the Internet of Things, including those related to device miniaturization, energizing, integration, etc.
 
Enlace: http://www.sciencepublishinggroup.com/j/iotcc


Miércoles, 24 de septiembre de 2014 Sin comentarios

¿Qué es Big Data?


[…] Debido al gran avance que existe día con día en las tecnologías de información, las organizaciones se han tenido que enfrentar a nuevos desafíos que les permitan analizar, descubrir y entender más allá de lo que sus herramientas tradicionales reportan sobre su información, al mismo tiempo que durante los últimos años el gran crecimiento de las aplicaciones disponibles en internet (geo-referenciamiento, redes sociales, etc.) han sido parte importante en las decisiones de negocio de las empresas. […]

Así comienza IBM justificando la aparición de un fenómeno en alza en su artículo “¿Qué es Big Data?”. En él se habla de los tipos de datos que comprenden el Big Data, hasta los componentes que forman una plataforma destinada a ello.

Leélo en: http://www.ibm.com/developerworks/ssa/local/im/que-es-big-data/


Categories: BigData Tags:

Miércoles, 24 de septiembre de 2014 Sin comentarios