# Computer Science

“A picture is worth a thousand words” may be a lovely cliché, but it’s exactly the wrong way to view visualization. For this week’s discussion question, please view the Periodic Table of Visualization at the following link (http://www.visual-literacy.org/periodic_table/periodic_table.html). Choose one Data Visualization and one Compound Visualization by placing your mouse cursor over each option. Provide your classmates with a narrative description of your choices and explain why you made your choices. Also, describe what advantage do your choices have over the others. Lastly, provide an example which illustrates how you would use your chosen visualizations.
Discussion Length (word count): At least 250 words

References: At least two peer-reviewed, scholarly journal references

1. With the partial implementation of the “Merge-Sort” algorithm (shown below), namely, merge( ) and mergeSort( ), build a test program that sorts an unsorted array of the size of 20. You may need Queue, LinkedQueue or any other classes and interfaces to import.

/** Merge contents of arrays S1 and S2 into properly sized array S. */

public static <K> void merge(K[] S1, K[] S2, K[] S, Comparator<K> comp) {

int i = 0, j = 0;

while (i + j < S.length) {

if (j == S2.length || (i < S1.length && comp.compare(S1[i], S2[j]) < 0))

S[i+j] = S1[i++]; // copy ith element of S1 and increment i

else

S[i+j] = S2[j++]; // copy jth element of S2 and increment j

}

}

/** Merge-sort contents of array S. */

public static <K> void mergeSort(K[] S, Comparator<K> comp) {

int n = S.length;

if (n < 2) return; // array is trivially sorted

// divide

int mid = n/2;

K[] S1 = Arrays.copyOfRange(S, 0, mid); // copy of first half

K[] S2 = Arrays.copyOfRange(S, mid, n); // copy of second half

// conquer (with recursion)

mergeSort(S1, comp); // sort copy of first half

mergeSort(S2, comp); // sort copy of second half

// merge results

merge(S1, S2, S, comp); // merge sorted halves back into original

}

2. With the partial implementation of the “Quick-Sort” algorithm (shown below, so-called divide and conquer areas), build a test program that sorts an unsorted array of the size of 20. Again, you may need Queue, LinkedQueue or any other classes and interfaces to import.

/** Quick-sort contents of a queue. */

public static <K> void quickSort(Queue<K> S, Comparator<K> comp) {

int n = S.size();

if (n < 2) return; // queue is trivially sorted

// divide

K pivot = S.first(); // using first as arbitrary pivot

Queue<K> L = new LinkedQueue<>();

Queue<K> E = new LinkedQueue<>();

Queue<K> G = new LinkedQueue<>();

while (!S.isEmpty()) { // divide original into L, E, and G

K element = S.dequeue();

int c = comp.compare(element, pivot);

if (c < 0) // element is less than pivot

L.enqueue(element);

else if (c == 0) // element is equal to pivot

E.enqueue(element);

else // element is greater than pivot

G.enqueue(element);

}

// conquer

quickSort(L, comp); // sort elements less than pivot

quickSort(G, comp); // sort elements greater than pivot

// concatenate results

while (!L.isEmpty())

S.enqueue(L.dequeue());

while (!E.isEmpty())

S.enqueue(E.dequeue());

while (!G.isEmpty())

S.enqueue(G.dequeue());

}

Please send me the source code you designed and the answer (55 points).

.

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