# Meredith

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Plotting Practice

Plot cos(x) vs x as shown in the figure below. Include the appropriate title, x-label, and y-label. Note, it is case sensitive. ...

5 months ago

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Determine if x is a combination of m and n

Given positive integers x, m, and n, determine if x can be written as x = am + bn for any (non-negative) integers a and b. Your ...

5 months ago

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Create an arrow matrix

An arrow matrix is a square matrix that contains ones on the diagonal, the last column, and last row. ...

5 months ago

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Calculating Student Grades

The matrix grades contains raw grades for 7 students who took your course. Each row represents a different student. The first 7 ...

5 months ago

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Dog Statistics

The vectors ht and wt contains the heights and weights of 20 golden retrievers. In some cases, it was not possible to make both ...

5 months ago

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Generate this matrix

Generate the following matrix. n = 2; out = [-4 -3 -2 -1 0 -3 -2 -1 0 1 -...

5 months ago

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Simpson's Paradox - Calculate correlation coefficients for groups of data

Simpson's Paradox is a statistical phenomenon where groups of data can have a characteristic while the whole data set together h...

5 months ago

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Find the minimum of the column-maximums of a matrix

Given a matrix A, find the maximum value of each column, then return the smallest of those maximum values (ie return the minimum...

5 months ago

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Calculate the mean of each half of a matrix

Given a matrix with an even number of columns, n, return a 1-by-2 row vector where the first element is the mean of all the elem...

5 months ago

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Find Closest Constant

Given a number x, return the value that is closest to x from this list of constants: 0, 1, , e, , (also known as ). For exampl...

5 months ago

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Matrix Quadrants

Write a function that takes N as the input, and outputs a matrix whose upper-left (NxN) quadrant contains all ones, the lower-ri...

5 months ago

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Given two arrays, find the maximum overlap

Given two (integer) arrays s1 and s2, create a new array s3 which is as short as possible and contains both arrays. #1 s1 = [...

5 months ago

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Renaming a field in a structure array

MATLAB has a <http://www.mathworks.com/help/techdoc/ref/setfield.html setfield> and a <http://www.mathworks.com/help/techdoc/ref...

5 months ago

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Knight's Tour Checker

Given a matrix a, determine whether or not a legal <http://en.wikipedia.org/wiki/Knight's_tour knight's tour> is present. The kn...

5 months ago

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Calculate BMI

Given a matrix |hw| (height and weight) with two columns, calculate BMI using these formulas: * 1 kilogram = 2.2 pounds * 1 ...

5 months ago

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What is the next step in Conway's Life?

Given a matrix A that represents the state of Conway's game of Life at one instant (time t=n), return the matrix B that represen...

5 months ago

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Calculate the Levenshtein distance between two strings

This problem description is lifted from http://en.wikipedia.org/wiki/Levenshtein_distance. The Levenshtein distance between two...

5 months ago

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Target sorting

Sort the given list of numbers |a| according to how far away each element is from the target value |t|. The result should return...

5 months ago

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Get the area codes from a list of phone numbers

Given a string of text with phone numbers in it, return a unique'd cell array of strings that are the area codes. s = '508-647...

5 months ago

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Counting in Finnish

Sort a vector of single digit whole numbers alphabetically by their name, in Finnish. See the Wikipedia page for <http://en.wik...

5 months ago

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It dseon't mettar waht oedrr the lrettes in a wrod are.

An internet meme from 2003 (read more here) asserted that readers are relatively insensitive to letter order in words, so long a...

5 months ago

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Indexed Probability Table

This question was inspired by a Stack Overflow question forwarded to me by Matt Simoneau. Given a vector x, make an indexed pro...

5 months ago

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Find state names that start with the letter N

Given a list of US states, remove all the states that start with the letter N. If s1 = 'Alabama Montana Nebraska Vermont Ne...

5 months ago

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Remove the polynomials that have positive real elements of their roots.

The characteristic equation for a dynamic system is a polynomial whose roots indicate its behavior. If any of the roots of the p...

5 months ago

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Longest Divisor Run

Given the vector a, find the longest run of consecutive numbers that can be evenly divided by the same number d where d > 1. ...

5 months ago

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Prime factor digits

Consider the following number system. Calculate the prime factorization for each number n, then represent the prime factors in a...

5 months ago

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Remove the small words from a list of words.

Your job is to tidy up a list of words that appear in a string. The words are separated by one or more spaces. Remove all words ...

5 months ago

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Mandelbrot Numbers

The <http://en.wikipedia.org/wiki/Mandelbrot_set Mandelbrot Set> is built around a simple iterative equation. z(1) = c z...

5 months ago

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Test for balanced parentheses

Given the input inStr, give the boolean output out indicating whether all the parentheses are balanced. Examples: * If ...

5 months ago

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DNA N-Gram Distribution

Given a string s and a number n, find the most frequently occurring n-gram in the string, where the n-grams can begin at any poi...

5 months ago