Brief introduction to the R language and its use in large data applications. Tools and techniques for data ingestion and analytics are touched on. Packages and support for publishing research and visualizations are described.
The presentation is a brief case study of R Programming Language. In this, we discussed the scope of R, Uses of R, Advantages and Disadvantages of the R programming Language.
R programming language: conceptual overviewMaxim Litvak
This is an advanced overview of the programming language R showing the concepts and paradigms used there.
Target audience: R programmers who want to see the big picture and software engineers who have a broad experience in other technologies and want to grasp how R is designed.
A relatively short Introduction to R as presented at the Belgian Software Craftmanship meetup group.
The goal of this presentation is to give you an introduction to:
• The style of the language
• It's ecosystem
• How common things like data manipulation and visualization work
• How to use it for machine learning
• Webdevelopment and report generation in R
• Integrating R in your system
License:
Introduction To R by Samuel Bosch
To the extent possible under law, the person who associated CC0 with Introduction To R has waived all copyright and related or neighboring rights
to Introduction To R.
http://creativecommons.org/publicdomain/zero/1.0/
The presentation is a brief case study of R Programming Language. In this, we discussed the scope of R, Uses of R, Advantages and Disadvantages of the R programming Language.
R programming language: conceptual overviewMaxim Litvak
This is an advanced overview of the programming language R showing the concepts and paradigms used there.
Target audience: R programmers who want to see the big picture and software engineers who have a broad experience in other technologies and want to grasp how R is designed.
A relatively short Introduction to R as presented at the Belgian Software Craftmanship meetup group.
The goal of this presentation is to give you an introduction to:
• The style of the language
• It's ecosystem
• How common things like data manipulation and visualization work
• How to use it for machine learning
• Webdevelopment and report generation in R
• Integrating R in your system
License:
Introduction To R by Samuel Bosch
To the extent possible under law, the person who associated CC0 with Introduction To R has waived all copyright and related or neighboring rights
to Introduction To R.
http://creativecommons.org/publicdomain/zero/1.0/
this presentation is an introduction to R programming language.we will talk about usage, history, data structure and feathers of R programming language.
Attached here is a presentation that I made covering some bits and pieces of what I got to discover about Data Science and Machine Learning using R Programming Language.
This short text will get you up to speed in no time on creating visualizations using R's ggplot2 package. It was developed as part of a training to those who had no prior experience in R and had limited knowledge on general programming concepts. It's a must have initial guide for those exploring the field of Data Science
R is a programming language and environment commonly used in statistical computing, data analytics and scientific research.
It is one of the most popular languages used by statisticians, data analysts, researchers and marketers to retrieve, clean, analyze, visualize and present data.
Due to its expressive syntax and easy-to-use interface, it has grown in popularity in recent years.
Given what a beautiful and mature functional programming language R is, there is a surprising, though understandable, lack of visibility of functional programming techniques in R. This is a talk given to the Mumbai R meetup group in October/November, 2014, meant to introduce the audience to Functional Programming in R.
This hands-on R course will guide users through a variety of programming functions in the open-source statistical software program, R. Topics covered include indexing, loops, conditional branching, S3 classes, and debugging. Full workshop materials available from http://projects.iq.harvard.edu/rtc/r-prog
Introduction to InfluxDB, an Open Source Distributed Time Series Database by ...Hakka Labs
In this presentation, Paul introduces InfluxDB, a distributed time series database that he open sourced based on the backend infrastructure at Errplane. He talks about why you'd want a database specifically for time series and he covers the API and some of the key features of InfluxDB, including:
• Stores metrics (like Graphite) and events (like page views, exceptions, deploys)
• No external dependencies (self contained binary)
• Fast. Handles many thousands of writes per second on a single node
• HTTP API for reading and writing data
• SQL-like query language
• Distributed to scale out to many machines
• Built in aggregate and statistics functions
• Built in downsampling
this presentation is an introduction to R programming language.we will talk about usage, history, data structure and feathers of R programming language.
Attached here is a presentation that I made covering some bits and pieces of what I got to discover about Data Science and Machine Learning using R Programming Language.
This short text will get you up to speed in no time on creating visualizations using R's ggplot2 package. It was developed as part of a training to those who had no prior experience in R and had limited knowledge on general programming concepts. It's a must have initial guide for those exploring the field of Data Science
R is a programming language and environment commonly used in statistical computing, data analytics and scientific research.
It is one of the most popular languages used by statisticians, data analysts, researchers and marketers to retrieve, clean, analyze, visualize and present data.
Due to its expressive syntax and easy-to-use interface, it has grown in popularity in recent years.
Given what a beautiful and mature functional programming language R is, there is a surprising, though understandable, lack of visibility of functional programming techniques in R. This is a talk given to the Mumbai R meetup group in October/November, 2014, meant to introduce the audience to Functional Programming in R.
This hands-on R course will guide users through a variety of programming functions in the open-source statistical software program, R. Topics covered include indexing, loops, conditional branching, S3 classes, and debugging. Full workshop materials available from http://projects.iq.harvard.edu/rtc/r-prog
Introduction to InfluxDB, an Open Source Distributed Time Series Database by ...Hakka Labs
In this presentation, Paul introduces InfluxDB, a distributed time series database that he open sourced based on the backend infrastructure at Errplane. He talks about why you'd want a database specifically for time series and he covers the API and some of the key features of InfluxDB, including:
• Stores metrics (like Graphite) and events (like page views, exceptions, deploys)
• No external dependencies (self contained binary)
• Fast. Handles many thousands of writes per second on a single node
• HTTP API for reading and writing data
• SQL-like query language
• Distributed to scale out to many machines
• Built in aggregate and statistics functions
• Built in downsampling
This presentation is an attempt do demystify the practice of building reliable data processing pipelines. We go through the necessary pieces needed to build a stable processing platform: data ingestion, processing engines, workflow management, schemas, and pipeline development processes. The presentation also includes component choice considerations and recommendations, as well as best practices and pitfalls to avoid, most learnt through expensive mistakes.
Sorry - How Bieber broke Google Cloud at SpotifyNeville Li
Talk at Scala Up North Jul 21 2017
We will talk about Spotify's story with Scala big data and our journey to migrate our entire data infrastructure to Google Cloud and how Justin Bieber contributed to breaking it. We'll talk about Scio, a Scala API for Apache Beam and Google Cloud Dataflow, and the technology behind it, including macros, algebird, chill and shapeless. There'll also be a live coding demo.
21 people attended the July 2014 program meeting hosted by BDPA Cincinnati chapter. The topic was 'Open Source Tools and Resources'. The guest speaker was Greg Greenlee (Blacks In Technology).
'Open source' refers to a computer program in which the source code is available to the general public for use or modification from its original design. Open source code is typically created as a collaborative effort in which programmers improve upon the code and share the changes within the community. Open source sprouted in the technological community as a response to proprietary software owned by corporations. Over 85% of enterprises are using open source software. Managers are quickly realizing the benefit that community-based development can have on their businesses. This month, we put on our geek hats and detective gloves to learn how we can monitor our computers’ environments using open source tools. This meetup covered some of the most popular ‘Free and Open Source Software’ (FOSS) tools used to monitor various aspects of your computer environment.
Reproducible Computational Research in RSamuel Bosch
A short presentation with pointers on getting started with reproducible computational research in R. Some of the topics include git, R package development, document generation with R markdown, saving plots, saving tables and using packrat.
Key lecture for the EURO-BASIN Training Workshop on Introduction to Statistical Modelling for Habitat Model Development, 26-28 Oct, AZTI-Tecnalia, Pasaia, Spain (www.euro-basin.eu)
Scio - Moving to Google Cloud, A Spotify StoryNeville Li
Talk at Philly ETE Apr 28 2017
We will talk about Spotify’s story of migrating our big data infrastructure to Google Cloud. Over the past year or so we moved away from maintaining our own 2500+ node Hadoop cluster to managed services in the cloud. We replaced two key components in our data processing stack, Hive and Scalding, with BigQuery and Scio and are able to iterate at a much faster speed. We will focus the technical aspect of Scio, a Scala API for Apache Beam and Google Cloud Dataflow and how it changed the way we process data.
How I learned to time travel, or, data pipelining and scheduling with AirflowLaura Lorenz
****UPDATE: Project is now open sourced at https://www.github.com/industrydive/fileflow****
From Pydata DC 2016
Description
Data warehousing and analytics projects can, like ours, start out small - and fragile. With an organically growing mess of scripts glued together and triggered by cron jobs hiding on different servers, we needed better plumbing. After perusing the data pipelining landscape, we landed on Airflow, an Apache incubating batch processing pipelining and scheduler tool from Airbnb.
Abstract
The power of any reporting tool breaks based on the data behind it, so when our data warehousing process got too big for its humble origins, we searched for something better. After testing out several options such as Drake, Pydoit, Luigi, AWS Data Pipeline, and Pinball, we landed on Airflow, an Apache incubating batch processing pipelining and scheduler tool originating from Airbnb, that provides the benefits of pipeline construction as directed acyclic graphs (DAGs), along with a scheduler that can handle alerting, retries, callbacks and more to make your pipeline robust. This talk will discuss the value of DAG based pipelines for data processing workflows, highlight useful features in all of the pipelining projects we tested, and dive into some of the specific challenges (like time travel) and successes (like time travel!) we’ve experienced using Airflow to productionize our data engineering tasks. By the end of this talk, you will learn
- pros and cons of several Python-based/Python-supporting data pipelining libraries
- the design paradigm behind Airflow, an Apache incubating data pipelining and scheduling service, and what it is good for
- some epic fails to avoid and some epic wins to emulate from our experience porting our data engineering tasks to a more robust system
- some quick-start tips for implementing Airflow at your organization.
IIUG 2016 Gathering Informix data into RKevin Smith
A basics walk-through on how to setup R to work with Informix JDBC, ODBC, and ReST/JSON. After taking the datasets examples and uploading them to Informix you can also look through the http://www.slideshare.net/thoi_gian/iris-data-analysis-with-r?qid=414b5431-9759-49e7-b3ba-c89a7bb357be&v=&b=&from_search=1, but replace the data targets with Informix ReST/JSON. Hint since the iris dataset's column names have a non-Informix compliant character I used JSON to store the data into Informix. If you rename the column you can get the data into a normal table through JDBC or ODBC.
Example Iris to JSON to Informix through ReST:
library(datasets)
library(jsonlite)
library(httr)
data(iris)
myjson <-><-><-><->)
dataset[1:3]
Levelwise PageRank with Loop-Based Dead End Handling Strategy : SHORT REPORT ...Subhajit Sahu
Abstract — Levelwise PageRank is an alternative method of PageRank computation which decomposes the input graph into a directed acyclic block-graph of strongly connected components, and processes them in topological order, one level at a time. This enables calculation for ranks in a distributed fashion without per-iteration communication, unlike the standard method where all vertices are processed in each iteration. It however comes with a precondition of the absence of dead ends in the input graph. Here, the native non-distributed performance of Levelwise PageRank was compared against Monolithic PageRank on a CPU as well as a GPU. To ensure a fair comparison, Monolithic PageRank was also performed on a graph where vertices were split by components. Results indicate that Levelwise PageRank is about as fast as Monolithic PageRank on the CPU, but quite a bit slower on the GPU. Slowdown on the GPU is likely caused by a large submission of small workloads, and expected to be non-issue when the computation is performed on massive graphs.
Data Centers - Striving Within A Narrow Range - Research Report - MCG - May 2...pchutichetpong
M Capital Group (“MCG”) expects to see demand and the changing evolution of supply, facilitated through institutional investment rotation out of offices and into work from home (“WFH”), while the ever-expanding need for data storage as global internet usage expands, with experts predicting 5.3 billion users by 2023. These market factors will be underpinned by technological changes, such as progressing cloud services and edge sites, allowing the industry to see strong expected annual growth of 13% over the next 4 years.
Whilst competitive headwinds remain, represented through the recent second bankruptcy filing of Sungard, which blames “COVID-19 and other macroeconomic trends including delayed customer spending decisions, insourcing and reductions in IT spending, energy inflation and reduction in demand for certain services”, the industry has seen key adjustments, where MCG believes that engineering cost management and technological innovation will be paramount to success.
MCG reports that the more favorable market conditions expected over the next few years, helped by the winding down of pandemic restrictions and a hybrid working environment will be driving market momentum forward. The continuous injection of capital by alternative investment firms, as well as the growing infrastructural investment from cloud service providers and social media companies, whose revenues are expected to grow over 3.6x larger by value in 2026, will likely help propel center provision and innovation. These factors paint a promising picture for the industry players that offset rising input costs and adapt to new technologies.
According to M Capital Group: “Specifically, the long-term cost-saving opportunities available from the rise of remote managing will likely aid value growth for the industry. Through margin optimization and further availability of capital for reinvestment, strong players will maintain their competitive foothold, while weaker players exit the market to balance supply and demand.”
Chatty Kathy - UNC Bootcamp Final Project Presentation - Final Version - 5.23...John Andrews
SlideShare Description for "Chatty Kathy - UNC Bootcamp Final Project Presentation"
Title: Chatty Kathy: Enhancing Physical Activity Among Older Adults
Description:
Discover how Chatty Kathy, an innovative project developed at the UNC Bootcamp, aims to tackle the challenge of low physical activity among older adults. Our AI-driven solution uses peer interaction to boost and sustain exercise levels, significantly improving health outcomes. This presentation covers our problem statement, the rationale behind Chatty Kathy, synthetic data and persona creation, model performance metrics, a visual demonstration of the project, and potential future developments. Join us for an insightful Q&A session to explore the potential of this groundbreaking project.
Project Team: Jay Requarth, Jana Avery, John Andrews, Dr. Dick Davis II, Nee Buntoum, Nam Yeongjin & Mat Nicholas
Opendatabay - Open Data Marketplace.pptxOpendatabay
Opendatabay.com unlocks the power of data for everyone. Open Data Marketplace fosters a collaborative hub for data enthusiasts to explore, share, and contribute to a vast collection of datasets.
First ever open hub for data enthusiasts to collaborate and innovate. A platform to explore, share, and contribute to a vast collection of datasets. Through robust quality control and innovative technologies like blockchain verification, opendatabay ensures the authenticity and reliability of datasets, empowering users to make data-driven decisions with confidence. Leverage cutting-edge AI technologies to enhance the data exploration, analysis, and discovery experience.
From intelligent search and recommendations to automated data productisation and quotation, Opendatabay AI-driven features streamline the data workflow. Finding the data you need shouldn't be a complex. Opendatabay simplifies the data acquisition process with an intuitive interface and robust search tools. Effortlessly explore, discover, and access the data you need, allowing you to focus on extracting valuable insights. Opendatabay breaks new ground with a dedicated, AI-generated, synthetic datasets.
Leverage these privacy-preserving datasets for training and testing AI models without compromising sensitive information. Opendatabay prioritizes transparency by providing detailed metadata, provenance information, and usage guidelines for each dataset, ensuring users have a comprehensive understanding of the data they're working with. By leveraging a powerful combination of distributed ledger technology and rigorous third-party audits Opendatabay ensures the authenticity and reliability of every dataset. Security is at the core of Opendatabay. Marketplace implements stringent security measures, including encryption, access controls, and regular vulnerability assessments, to safeguard your data and protect your privacy.
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Empowering the Data Analytics Ecosystem: A Laser Focus on Value
The data analytics ecosystem thrives when every component functions at its peak, unlocking the true potential of data. Here's a laser focus on key areas for an empowered ecosystem:
1. Democratize Access, Not Data:
Granular Access Controls: Provide users with self-service tools tailored to their specific needs, preventing data overload and misuse.
Data Catalogs: Implement robust data catalogs for easy discovery and understanding of available data sources.
2. Foster Collaboration with Clear Roles:
Data Mesh Architecture: Break down data silos by creating a distributed data ownership model with clear ownership and responsibilities.
Collaborative Workspaces: Utilize interactive platforms where data scientists, analysts, and domain experts can work seamlessly together.
3. Leverage Advanced Analytics Strategically:
AI-powered Automation: Automate repetitive tasks like data cleaning and feature engineering, freeing up data talent for higher-level analysis.
Right-Tool Selection: Strategically choose the most effective advanced analytics techniques (e.g., AI, ML) based on specific business problems.
4. Prioritize Data Quality with Automation:
Automated Data Validation: Implement automated data quality checks to identify and rectify errors at the source, minimizing downstream issues.
Data Lineage Tracking: Track the flow of data throughout the ecosystem, ensuring transparency and facilitating root cause analysis for errors.
5. Cultivate a Data-Driven Mindset:
Metrics-Driven Performance Management: Align KPIs and performance metrics with data-driven insights to ensure actionable decision making.
Data Storytelling Workshops: Equip stakeholders with the skills to translate complex data findings into compelling narratives that drive action.
Benefits of a Precise Ecosystem:
Sharpened Focus: Precise access and clear roles ensure everyone works with the most relevant data, maximizing efficiency.
Actionable Insights: Strategic analytics and automated quality checks lead to more reliable and actionable data insights.
Continuous Improvement: Data-driven performance management fosters a culture of learning and continuous improvement.
Sustainable Growth: Empowered by data, organizations can make informed decisions to drive sustainable growth and innovation.
By focusing on these precise actions, organizations can create an empowered data analytics ecosystem that delivers real value by driving data-driven decisions and maximizing the return on their data investment.
Machine learning and optimization techniques for electrical drives.pptx
R - the language
1. R - scripted data
History
Language
Packages
Tools
RPubs
Slidify
Shiny
2. A Brief History of R
– 1976 S - Bell Labs; Fortran
– John Chambers
– 1988 S Version 3; C language
● 1991 R Created
– Ross Ihaka and Robert Gentleman
● 1993 R Announced
– 1993 S licensed to StatSci (now Insightful)
● 2000 R Version 1.0.0 released
– 2004 S purchased from Lucent (2MM)
– 2008 TIBCO acquires Insightful (25MM)
3. Other “Stats” Tools
● R – additional, commercial support
Oracle: “Big Data Appliance” - R + Hadoop
+ Linux + NoSQL + Exadata(H/W)
IBM: R executing in Hadoop (massively
parallel in-databse analytics)
● SAS (SAS Institute) dev. 1966, 1st rel 1972
● SPSS (IBM) 1st rel 1968
6. Language
● Derviative of S (S PLUS)
● Portable (includes Playstation 3)
● Interpreted, calls into C libraries
● Functional!
● GPL
● 40 year old technology
● Open Source (you want it, you do it)
7. Data Types
● Symbols refer to objects
● Object attributes
– names
– dimnames
– dimensions
– class
– length
– user defined attributes/metadata
8. Data Types
● Object types – single class, except list
– List
(may have mixed classes)
– Vectors
(scalar is a vector of length 1)
– Matrices
(vector with 'dimension' attribute)
(column major order)
9. Data Types
● Object types
– Factors
● Categorical data (like an enumeration)
– Data frames
● Special list, each element has same length
● Elements are columns with length rows
● Each elements (column) has its own type
● row.names() attribute to name the rows
● Convert to matrix with data.matrix()
● Load with read.table(), read.csv()
10. Data Types
● Object “atomic” classes
– character
– numeric (double precision real)
– integer
– complex
– logical (booleans)
Numeric and Integer include Inf and NaN
1 / Inf == 0 !
any class can be NA
NaN is NA, NA is not NaN
11. Data Types
● Dates
– “Date” class
– Days since epoch (1970-01-01)
● Times
– “POSIXct” or “POSIXlt” class
– Seconds since epoch
● Coerce to string with as.Date()
● Generic functions include 'weekdays()',
months()', 'quarters()'
14. Apply
● apply – apply functions over arrays
● lapply – apply functions over list / vector
● sapply – apply function to data frames
● tapply – apply function over ragged array
● mapply – apply function to multiple objects
15. Functions
● Functions are objects
● Functional closure consists of:
– Formal argument list
– Function body (definition)
– Environment
● Each of these can be assigned to
● Assign to environment can eliminate
unwanted environment capture
16. Packages
● CRAN (Comprehensive R Archive Network)
– Main site, includes R download
● Bioconductor
– Analysis of genomic data
– Next generation high-throughput
sequencing
● R-forge
● GitHub and Personal repositories
17. Packages
● Analysis
– Statistical analysis (stats, linprog)
● Linear (and general linear) modeling
● Tree models
● Analysis of variance
– Machine learning (caret, kernlab)
● Clustering (forests, k-means, knn, etc)
● Training and predictions
● Cross validation and error analysis
19. Packages
● Data visualization
– rCharts (GitHub), converts visualizations to
Javascript (e.g. d3.js)
http://www.google.com/trends/explore#q=R%20language%2C%20Data%20Visualization%2C%20D3.js%2C%20Processing.js&cmpt=q
20. Tools
● Command line
● Rstudio (can run on remote Linux server)
● Rkward
● Rcommander (tcl/tk)
● JGR – Java (GUI for R)
● Rattle - RGtk2
21. Tools
● Debugging
– Print statements!
– Interactive tools:
● traceback() – stack trace on error
● debug() – flags function for stepping
● browser() - stops function and enters debug
● trace() - insert trace statements
● recover() - modify error behavior, can
browse call stack
22. Tools
● Profiling
– “We should forget about small efficiencies,
say about 97% of the time: premature
optimization is the root of all evil”
– Donald Knuth
– system.time() - CPU, wall times
– Rprof() - use symmaryRprof() to see results
● Do not use Rprof() and system.time()
together
● Calls to C/Fortran libraries not profiled
23. Data Exploration
● Script it!
– If you can't repeat it, it didn't happen
● Get the data (ingest)
– Functions to download, uncompress,
unarchive, store, read, and organize
● Clean the data
– Handle missing and incomplete data,
impute values, identify outliers
24. Data Exploration
● Look at the data (models, visualization)
– Model – regressions (linear, logistic),
clustering, ANOVA
– Refine models and plot the result
● Look for systematic issues – unexpected
trends, bias, unexplained variance, error
estimates, residual analysis
● Explore complexity – number of explanatory
factors
– Plot the models
● What does it look like?
25. Reproducible Research
● Allows others to validate the work
● Ensures that the results are accepted
● Reduces the chance of errors propagating
– http://youtu.be/7gYIs7uYbMo
– 2010 Anil Potti resigns from Duke after
research was found flawed (off by 1!)
● Clinical trials based on the flawed research
was finally cancelled
● Closed data, non-reproducible research
exacerbated the problem
26. Reproducible Research
● Don't do things by hand – especially editing
spreadsheets to “clean up” data (removing
outliers, validating, editing) or dowloading
files
● Actions taken by hand need very detailed
documentation to reproduce – such as
download sites and what files were
downloaded to
● GUIs are convenient, but can't be repeated
27. Reproducible Research
● Capture the steps in a script:
– download.file(“http://...”, “localfile.zip”)
● Can be repeated as long as the link is
available. Can keep and manage the
downloaded file if that is an issue
– Use version control
● Capture small steps at a time (git is good
for this!)
● Can track changes and revert if needed
● Can use GitHub, BitBucket, SouceForge to
publish the results as well
28. Reproducible Research
● Capture environment – OS, tools, versions
● Don't save outputs – regenerate
– Ok to cache results while in use, but don't
store the results, just the code+data that
produced it
– If you keep intermediate files, document
how they were created
● Set random seed
29. Sharing Research
● Rmarkdown – markdown with embedded R
– knitr package executes the R fragments
and embeds the code and results into
markdown, which can convert to HTML or
PDF
– Literate programming!
● Hosted documentation
– Rpubs (rpubs.com)
– GitHub gh-pages (github.io)
30. Sharing Research
● Embedded presentations
– Author using slidify package
– Rmarkdown with embedded R code
– Creates HTML5 presentation slide deck
– Can include inline quizes
31. Data Products
● Interactive visualizations
– shiny, shinyapp packages
– RStudio includes interactive display of
shiny applications during development
– Generates bootstrap + HTML5 + javascript
+ d3 application
● Hosted!
– Hosted at shinyapp.io
– Private? Server images available (for
purchase)