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Description
The Big R-BookIntroduces professionals and scientists to statistics and machine learning using the programming language R Written by and for practitioners, this book provides an overall introduction to R, focusing on tools and methods commonly used in data science, and placing emphasis on practice and business use. It covers a wide range of topics in a single volume, including big data, databases, statistical machine learning, data wrangling, data visualization,
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.8 ★★★★★
Based on 628 reviews
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Product Reviews
★★★★★ 1
not worth the cost
I love these balls for night time ball playing but they dont last. The last 4 Ive bought havent worked well or lasted more than a month. They were once worth the money
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 1, 2026
★★★★★ 3
Great Idea but they will let you down eventually
I have used these for years during the winter. The price has nearly tripled but the longevity is the same. I normally purchase three with one being a spare. Within a few weeks they start going. I switch batteries etc but normally that does not help. Its a great idea and my dogs love them but they dont hold up to 10 minutes of play each nite. We do not throw them either, I roll them or kick them as my dogs are older
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 12, 2025
★★★★★ 5
Great product
Very good. Hours of fun with the dog.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 3, 2026
★★★★★ 2
Expensive ball- stops working in a week
Came without any protection inside for batteries. Stopped working after a week. Expensive ball to break in a week
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 7, 2025
★★★★★ 5
Great ball for dogs
Murphy’s favorite ball!!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 18, 2026
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