A key task that any aspiring data-driven organization needs to learn is data wrangling, the process of converting raw data into something truly useful. This practical guide provides business analysts with an overview of various data wrangling techniques and tools, and puts the practice of data wrangling into context by asking, "What are you trying to do and why?" Wrangling data consumes roughly 50-80% of an analyst’s time before any kind of analysis is possible. Written by key executives at Trifacta, this book walks you through the wrangling process by exploring several factors—time, granularity, scope, and structure—that you need to consider as you begin to work with data. You’ll learn a shared language and a comprehensive understanding of data wrangling, with an emphasis on recent agile analytic processes used by many of today’s data-driven organizations. Appreciate the importance—and the satisfaction—of wrangling data the right way. Understand what kind of data is available Choose which data to use and at what level of detail Meaningfully combine multiple sources of data Decide how to distill the results to a size and shape that can drive downstream analysis
A key task that any aspiring data-driven organization needs to learn is data wrangling, the process of converting raw data into something truly useful. This practical guide provides business analysts with an overview of various data wrangling techniques and tools, and puts the practice of data wrangling into context by asking, "What are you trying to do and why?" Wrangling data consumes roughly 50-80% of an analyst’s time before any kind of analysis is possible. Written by key executives at Trifacta, this book walks you through the wrangling process by exploring several factors—time, granularity, scope, and structure—that you need to consider as you begin to work with data. You’ll learn a shared language and a comprehensive understanding of data wrangling, with an emphasis on recent agile analytic processes used by many of today’s data-driven organizations. Appreciate the importance—and the satisfaction—of wrangling data the right way. Understand what kind of data is available Choose which data to use and at what level of detail Meaningfully combine multiple sources of data Decide how to distill the results to a size and shape that can drive downstream analysis
Simple and carefully translated and adapted text provides statistics and a biographical profile in this engaging book, while the up-to-the-minute photos excite young fans of racing. Bilingual readers will certainly build their vocabularies as they learn about Jamie McMurray, one of NASCAR's hottest stars.
Simple and carefully translated and adapted text provides statistics and a biographical profile in this engaging book, while the up-to-the-minute photos excite young fans of racing. Bilingual readers will certainly build their vocabularies as they learn about Denny Hamlin, one of NASCAR's hottest stars.
Simple and carefully translated and adapted text provides statistics and a biographical profile in this engaging book, while the up-to-the-minute photos excite young fans of racing. Bilingual readers will certainly build their vocabularies as they learn about Greg Biffle, one of NASCAR's hottest stars.
During the Second World War, the British military and intelligence agencies had plans in case Germany invaded Spain and Portugal. This involved training British and Spanish agents to be secretly infiltrated to undertake sabotage operations on important lines of communication and liaising with pro-British locals. At the same time the Abwehr, Germany's military intelligence agency, paid young Spanish and Portuguese collaborators to undertake sabotage missions against Allied military and economic targets in Iberia but they had limited success. Italian saboteurs from the Decima Flotigglia MAS were more successful using underwater divers to attack Allied shipping. Using declassified files from Britain's National Archives, autobiographies, biographies and newspaper articles, this documentary history sheds new light on an unusual aspect of Iberian history telling a human story of international diplomacy, political intrigue, secret agents, clandestine warfare, military strategy, nationalism, and deception.
This book is the first archival study of the Mudejar or conquered Muslim community of Xàtiva from 1240 until 1327. It is a long overdue model study of the largest and most important Mudejar community in the kingdom of Valencia.
On November 24, 1968, more than 250 people from 19 nations set off on a 10,000-mile endurance rally from London to Sydney. Crossing 10 countries, competitors encountered officious border guards, gangs of rock-throwing children, treacherous driving conditions, collisions, breakdowns, injuries, wayward dogs, livestock, camels and kangaroos, millions of spectators crowding the roads and even bandits. Among the professional drivers were a large number of enthusiastic amateurs, many of whom had never raced in their lives. Drawing from personal recollections of more than 60 participants--many who made it to Sydney and many more who didn't--and contemporary newspaper and magazine articles, this book tells the full story of what was called the "Marathon," from an idea dreamed up over an alcohol-fueled lunch to the last car over the finish line.
Conveys the story of the birds and birders that gather in Cape May Point, N.J., describing the adaptations, migratory patterns, and aerodynamics of the birds.
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