Analysis of Algorithms (Complete My Task)

Hi Friends,

Please find the below assignment i need it asap

Library Sort

The paper “Insertion Sort is O(n log n)” by Bender et al is the basis

of this assignment (Theory of Computing Systems, vol 39, 2006, pp.

391-397). It is easily found by a Google search; contact me if there

is any difficulty in this regard.

Your goal is to empirically verify the claims that it makes.

Since time clocks are too coarse, timing is problematic at best.

Instead you will compute "time" discretely. In other words let any

sequence of simple statements (assignments, if's, etc.) be charged

"one unit" of time. More specifically, every time you enter the body

of a loop you increment the clock; this applies even to nested loops.

Also increment the clock when you enter any procedure. You will

need to instrument your code with accumulators to compute "run times"


First code up the paper's Library Sort algorithm. There are some parts

left to the reader’s imagination, like “as evenly as possible”, that

you must disambiguate yourself. (Perhaps everyone will resolve these

details differently; it should not matter.)

They state there is “a tradeoff … between c and \epsilon”. \epsilon is

a parameter that is chosen by the user, while c is a hidden parameter

in the proof that is not controlled at all. The smaller \epsilon is

the larger c will be. \epsilon controls space usage, while c controls

the hidden constant in the run-time.

To generate your own test input create random permutations of the

integers [1..n], using the simple algorithm in chapter 5. Any data

point reported will be the average “time” of 10 runs.

You will use various values of n to verify the run-time curve is

O(n log n), where n is large enough to test the claims. To scale the

output you should compare it to InsertionSort and Quicksort. The latter

two algorithms can be copied from anywhere (i.e. need not be your own)

but need to be instrumented for timing.

You must empirically understand the relationship of \epsilon to

performance. The paper makes no measurable claims.

You may program in any major procedural language, on any platform.

You will submit your code and a write-up (.doc, .pdf, or .txt). The

write-up should not repeat what is in the paper. Your discussion of

the results of the runs should be succinct and to the point. Imagine

I am your boss and we are trying to decide if and when we should use

Library Sort.)

Habilidades: Programação C, Java, Arquitetura de software

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