Question

[Question 4, 8 points total, including 4.1 - 4.3] This question is about understanding data representation and input/output in Spark. 4.1 (3 points) Spark uses a string to represent a vector. For example, (8, [1,4,5), 10.871, 1.0, 0.447]) is one such string. Write out the full vector that the above string represents: your answer: 4.2 (2 points) Very briefly, what is the main advantage of using such a sting representation for a vector? your answer:

Answer 1

PLEASE GIVE IT A THUMBS UP, PLEASE I SERIOUSLY NEED ONE

4.1. In Spark we've many forms of vectors to represent the string in

Given, (8, [1,4,5], [0.871, 1.0, 0.447])

In this It has a size of 8, [1,4,5] represent the indices, the rest represent the values which are non-zero

It means that the vector has

0.871 at 1st position

1.0 at 4th position

0.447 at 5th position

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4.2. It's helpful in computation and storage management. Such a string is used to provide clear reference.