Tag: statistics

Feed: Featured Blog Posts - Data Science Central. Author: Bohdan Pavlyshenko. In this post, we consider different approaches for time series modeling. The forecasting approaches using linear models, ARIMA alpgorithm, XGBoost machine learning algorithm are described. Results of different model combinations are shown. For probabilistic modeling the approaches using copulas and Bayesian inference are considered. INTRODUCTION Time series analysis, especially forecasting, is an important problem of modern predictive analytics. The goal of this study is to consider different aproaches for time series modeling.  For our analysis, we used stores sales historical data from a particular competition “Rossmann Store Sales”. These ... Read More

Feed: Featured Blog Posts - Data Science Central. Author: Vincent Granville. Guest blog post by Rubens Zimbres, PhD. This article brings images from my work modeling with Mathematica, my experience as a Business Analyst and also my doctorate lessons. For me, the borders between a properly executed Business Intelligence and Data Science (with substantive knowledge in Management) are fuzzy. See the picture below: What is a Data Scientist ? In my understanding, someone can be a data scientist according to his domain expertise: Business management, physics, computer science, etc. DATA SCIENCE AND BUSINESS INTELLIGENCE PHASES 1) UNDERSTAND PROCESSES First of all, ... Read More

Feed: Planet MySQL. Author: Rick Pizzi. Sometimes MySQL surprises you in ways you would have never imagined.Would you think that the order in which the indexes appear in a table matters?It does. Mind you, not the order of the columns - the order of the indexes.MySQL optimizer can, in specific circumstances, take different paths, sometimes with nefarious effects. Please consider the following table: CREATE TABLE `mypartitionedtable ` (  `HASH_ID` char(64) NOT NULL,  `RAW_DATA` mediumblob NOT NULL,  `EXPIRE_DATE` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,  KEY `EXPIRE_DATE_IX` (`EXPIRE_DATE`),  KEY `HASH_ID_IX` (`HASH_ID`)) ENGINE=TokuDB DEFAULT CHARSET=latin1 ROW_FORMAT=TOKUDB_UNCOMPRESSED/*!50100 PARTITION BY RANGE (UNIX_TIMESTAMP(EXPIRE_DATE))(PARTITION p2005 VALUES LESS THAN (1487847600) ENGINE = TokuDB, PARTITION p2006 ... Read More

Feed: Planet big data. Author: Meg Blanchette. An Interview with Travis Oliphant  |  February 21st, 2017 In late 2016 I spoke with with Travis Oliphant, co-founder of Continuum Analytics. We covered many topics, including building a community and balancing enterprise with open source. I’ve broken our conversation up into a series of posts, which will be published over the next several weeks. In this first part of our interview, we discuss breaking down silos, the importance of effectively communicating about cutting-edge technology, and where Anaconda is going next. What are you most excited about right now? I’m looking for a ... Read More

Feed: Planet big data. Author: Thomas Maydon. “Lies, damned lies and statistics” is the frequently quoted adage attributed to former British Prime Minister Benjamin Disraeli. The manipulation of data to fit a narrative is a very common occurrence from politics, economics to business and beyond. In this blog post, we'll touch on the more common logical fallacies that can be encountered and should be avoided in data analysis ... Read More

Feed: Planet big data. Author: David Smith. When we last looked at job trends from indeed.com, job listings for "R statistics" were on the rise but were still around half the volume of listings for "SAS statistics". Three-and-a-half years later, R has overtaken SAS in job listings for "statistics". I added Python to the search this time; job listings for "Python statistics" have risen at a similar rate to those for R, but with a somewhat higher volume for R. Since data science is popular job role these days, let's do the same search for "data scientist": For "data scientist" jobs, R and Python ... Read More

Feed: Big Data Feed. Author: itsing. Does this sound disturbing?  You try to reach a particular website only to find the site is down. But it’s not that simple. You try another site – also not reachable. And another and another… You look to social media for in-the-moment reports about what’s happening and while you are reading about a huge swath of the country under cyber attack, that social media site goes out, too.This was what many people in North America experienced on 21 October 2016 when a widespread DDoS (distributed denial of service) attack took place in several waves, ... Read More

Feed: MariaDB Knowledge Base Article Feed. Author: . A session consists of a client connection, any number of related backend connections, a router module session and possibly filter module sessions. Each session is created on a service and a service can have multiple sessions. Resource Operations Get a session Get a single session. :id must be a valid session ID. GET /sessions/:id Response Status: 200 OK { "id": 1, "state": "Session ready for routing", "user": "jdoe", "address": "192.168.0.200", "service": "/services/my-service", "connected": "Wed Aug 31 03:03:12 2016", "idle": 260 } Supported Request Parameter Get all sessions Get all sessions. GET /sessions ... Read More

Feed: MariaDB Knowledge Base Article Feed. Author: . A server resource represents a backend database server. Resource Operations Get a server Get a single server. The :name in the URI must be a valid server name with all whitespace replaced with hyphens. The server names are case-insensitive. GET /servers/:name Response Status: 200 OK { "name": "db-serv-1", "address": "192.168.121.58", "port": 3306, "protocol": "MySQLBackend", "status": [ "master", "running" ], "parameters": { "report_weight": 10, "app_weight": 2 } } Note: The parameters field contains all custom parameters for servers, including the server weighting parameters. Supported Request Parameter Get all servers GET /servers Response Status: ... Read More

Feed: MariaDB Knowledge Base Article Feed. Author: . The MaxScale resource represents a MaxScale instance and it is the core on top of which the modules build upon. Resource Operations Get global information Retrieve global information about a MaxScale instance. This includes various file locations, configuration options and version information. GET /maxscale Response Status: 200 OK { "config": "/etc/maxscale.cnf", "cachedir": "/var/cache/maxscale/", "datadir": "/var/lib/maxscale/" "libdir": "/usr/lib64/maxscale/", "piddir": "/var/run/maxscale/", "execdir": "/usr/bin/", "languagedir": "/var/lib/maxscale/", "user": "maxscale", "threads": 4, "version": "2.1.0", "commit": "12e7f17eb361e353f7ac413b8b4274badb41b559" "started": "Wed, 31 Aug 2016 23:29:26 +0300" } Supported Request Parameter Get thread information Get detailed information and statistics about the ... Read More