Tag: row

Feed: Featured Blog Posts - Data Science Central. Author: Jonathan Symonds. TLDR: Neural Networks are powerful but complex and opaque tools. Using Topological Data Analysis, we can describe the functioning and learning of a convolutional neural network in a compact and understandable way. The implications of the finding are profound and can accelerate the development of a wide range of applications from self-driving everything to GDPR.Introduction Neural networks have demonstrated a great deal of success in the study of various kinds of data, including images, text, time series, and many others.  One issue that restricts their applicability, however, is the ... Read More

Feed: R-bloggers. Author: sindri. Datasets often arrive to us in a form that is different from what we need for our modelling or visualisations functions who in turn don’t necessary require the same format. Reshaping data.frames is a step that all analysts need but many struggle with. Practicing this meta-skill will in the long-run result in more time to focus on the actual analysis. The solutions to this set will rely on data.table, mostly melt() and dcast() which are originally from the reshape2 package. However, you can also get practice out if it using your favourite base-R, tidyverse or any ... Read More

Feed: Planet MySQL; Author: MyDBOPS; In this blog, we will see the very basic thing “I” of “ACID” and an important property of Transaction ie., “ISOLATION” The isolation defines the way in which the MySQL server (InnoDB) separates each transaction from other concurrent running transaction in the server and also ensures that the transactions are processed in a reliable way. If transactions are not isolated then one transaction could modify the data that another transaction is reading hence creating data inconsistency. Isolation levels determine how isolated the transactions are from each other. MySQL supports all four the isolation levels that SQL-Standard defines.The ... Read More

Feed: R-bloggers. Author: Bob Muenchen. Introduction BlueSky Statistics’ desktop version is a free and open source graphical user interface for the R software that focuses on beginners looking to point-and-click their way through analyses.  A commercial version is also available which includes technical support and a version for Windows Terminal Servers such as Remote Desktop, or Citrix. Mac, Linux, or tablet users could run it via a terminal server. This post is one of a series of reviews which aim to help non-programmers choose the Graphical User Interface (GUI) that is best for them. Additionally, these reviews include a cursory description of the ... Read More

Feed: Planet MySQL; Author: Andrew Grimo; There are numerous ways to filter your replication stream in MySQL.  So many, that the documentation team has created guided “walk-through” pages for considering the various complex DB Filtering and subsequent Table Filtering paths folks have used for the “global” filtering options.  But now there are “channel specific” options that can be implemented at startup with enhanced channel specific filtering configurations or dynamically using the new CHANGE  REPLICATION FILTER statements now available in MySQL 8.0. Many MySQL use-cases out there involve replication.  Many of those replication setup involve the use of replication filtering patterns too.  They ... Read More

Feed: Planet PostgreSQL. Businesses and services deliver value based on data. Availability, consistent state, and durability are top priorities for keeping customers and end-users satisfied. Lost or inaccessible data could possibly equate to lost customers. Database backups should be at the forefront of daily operations and tasks. We should be prepared for the event that our data becomes corrupted or lost. I'm a firm believer in an old saying I’ve heard: "It's better to have it and not need it than to need it and not have it." That applies to database backups as well. Let's face it, without them, ... Read More

Feed: AWS Government, Education, & Nonprofits Blog. Author: publicsector. Northern Virginia Community College (NOVA), in collaboration with Amazon Web Services (AWS) Educate program, today announced a Cloud Computing specialization as part of its Information Systems Technology (IST) Associate of Applied Science degree starting in Fall 2018. The program will be one of the first cloud computing degrees in the nation offered by a community college.The two-year IST Cloud Computing degree program is built to address the high concentration of tech employers in the Northern Virginia region and the demand for employees with cloud computing skills. “Cloud and distributed computing” has ... Read More

Feed: Neo4j Graph Database Platform. Author: Jocelyn Hoppa. By Stephan Reiling, Senior Scientist, Novartis | June 20, 2018  Editor’s Note: This presentation was given by Stephan Reiling at GraphConnect San Francisco in October 2016.Presentation SummaryIn this talk, Senior Scientist Stephan Reiling describes some of the ways that a major pharmaceutical company conducts the search for medical compounds, and the significant role that graph database technology plays in that effort.The underlying problem is how to construct a system of scalable biological knowledge. This means not just connecting vast amounts of heterogeneous data, but enabling researchers to construct a query for a ... Read More

Feed: Planet MySQL; Author: MySQL Performance Blog; David Ducos | June 19, 2018 |  Posted In: InnoDB, Insight for DBAs, MySQL, open source databases, Percona Server for MySQL PREVIOUS POST Since MySQL 5.7.5, we have been able to resize dynamically the InnoDB Buffer Pool. This new feature also introduced a new variable — innodb_buffer_pool_chunk_size — which defines the chunk size by which the buffer pool is enlarged or reduced. This variable is not dynamic and if it is incorrectly configured, could lead to undesired situations. Let’s see first how innodb_buffer_pool_size , innodb_buffer_pool_instances  and innodb_buffer_pool_chunk_size interact: The buffer pool can hold several instances and each ... Read More

Feed: R-bloggers. Author: xi'an. A quick riddler resolution during a committee meeting (!) of a short riddle: 36 houses stand in a row and collapse at times t=1,2,..,36. In addition, once a house collapses, the neighbours if still standing collapse at the next time unit. What are the shortest and longest lifespans of this row? Since a house with index i would collapse on its own by time i, the longest lifespan is 36, which can be achieved with the extra rule when the collapsing times are perfectly ordered. For the shortest lifespan, I ran a short R code implementing ... Read More