#DS101: understanding the basics

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understanding the basics #DS101

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HELLO My name is ASWAN

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aswansyahputra ● Data Analyst @ Jabar Digital Service ● Sensory Scientist @ Sensolution.ID ● Instructor @ R Academy Telkom University ● Initiator of Komunitas R Indonesia

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Unit di bawah Dinas Komunikasi dan Informatika Provinsi Jawa Barat yang dicita-citakan dapat mempersempit kesenjangan digital, membantu efisiensi dan akurasi pengambilan kebijakan berbasis data dan teknologi, serta merevolusi pemakaian teknologi dalam kehidupan masyarakat serta pemerintahan di Jawa Barat. Jabar Digital Service

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R Indonesia www.r-indonesia.id Telegram: @GNURIndonesia (t.me/GNURIndonesia) Web: www.r-indonesia.id GitHub: www.github.com/indo-r

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data ? what is

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“Facts that can be analyzed or used in an effort to gain knowledge or make decisions; information.” “a collection of facts, observations, or other information related to a particular question or problem.” “a collection of facts from which conclusions may be drawn.” – The American Heritage® Dictionary of the English Language, 5th Edition – GNU version of the Collaborative International Dictionary of English – WordNet 3.0 Copyright 2006 by Princeton University

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crucial ? why is it

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science ? what is data

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Data science is the art of turning raw data into understanding

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why the hype?

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No content

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activities ? what are the

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Prepare

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Prepare Understand

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Prepare Understand Communicate

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workflow ? how is the

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Import Tidy Transform Visualise Model Communicate

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Remote Files Local Files Database API Clipboard Data import

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Data wrangling Tidy Transform

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Data visualisation I. Exploration

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Data visualisation II. Presentation

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Data modeling Predict Explain “All models are wrong, but some are useful” – George Box

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Mean of x 9 exact Sample variance of x 11 exact Mean of y 7.50 to 2 decimal places Sample variance of y 4.125 ±0.003 Correlation between x and y 0.816 to 3 decimal places Linear regression line y = 3.00 + 0.500x to 2 and 3 decimal places, respectively R2 0.67 to 3 decimal places Anscombe’s Quartet

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Viz + Stats

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Graphics Dashboards Reports Slides API Data communication

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key skills ? what are the

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Import Tidy Transform Visualise Model Communicate

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Import Tidy Transform Visualise Model Communicate Understand

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Program Import Tidy Transform Visualise Model Communicate Understand

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Statistic

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Statistic Program

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Think Do Describe (preciely) Cognitive Computational

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Easy to use for the standard things, but very frustrating if you want to do something that is not already preprogrammed. Program like SPSS are busses...

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R can take you anywhere you want to go if you take time to learn how to use the equipment, but that is going to take longer than learning where the bus stops are in SPSS. R is a 4-wheel drive SUV (though environmentally friendly) with a bike on the back, a kayak on top, good walking and running shoes in the passenger seat, and mountain climbing and spelunking gear in the back.