# David Nardi

**Statistics**

**Cody**

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**Content Feed**

Solved

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. ...

9 days ago

Solved

Interpolator

You have a two vectors, a and b. They are monotonic and the same length. Given a value, va, where va is between a(1) and a(end),...

2 months ago

Solved

Sort a list of complex numbers based on far they are from the origin.

Given a list of complex numbers z, return a list zSorted such that the numbers that are farthest from the origin (0+0i) appear f...

2 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. ...

2 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 ...

2 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 ...

2 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 ...

2 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 -...

2 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...

2 months ago

Solved

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...

2 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...

2 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...

2 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...

2 months ago

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Chess probability

The difference in the ratings between two players serves as a predictor of the outcome of a match (the <http://en.wikipedia.org/...

2 months ago

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Longest run of consecutive numbers

Given a vector a, find the number(s) that is/are repeated consecutively most often. For example, if you have a = [1 2 2 2 1 ...

3 months ago

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Rescale Scores

Each column (except last) of matrix |X| contains students' scores in a course assignment or a test. The last column has a weight...

3 months ago

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Calculate Inner Product

Given two input matrices, |x| and |y|, check if their inner dimensions match. * If they match, create an output variable |z|...

3 months ago

Solved

Number of 1s in a binary string

Find the number of 1s in the given binary string. Example. If the input string is '1100101', the output is 4. If the input stri...

3 months ago

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Return the first and last characters of a character array

Return the first and last character of a string, concatenated together. If there is only one character in the string, the functi...

3 months ago

Solved

Create times-tables

At one time or another, we all had to memorize boring times tables. 5 times 5 is 25. 5 times 6 is 30. 12 times 12 is way more th...

3 months ago

Solved

Getting the indices from a vector

This is a basic MATLAB operation. It is for instructional purposes. --- You may already know how to <http://www.mathworks....

3 months ago

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Make a random, non-repeating vector.

This is a basic MATLAB operation. It is for instructional purposes. --- If you want to get a random permutation of integer...

3 months ago

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Find MPG of Lightest Cars

The file |cars.mat| contains a table named |cars| with variables |Model|, |MPG|, |Horsepower|, |Weight|, and |Acceleration| for ...

3 months ago

Solved

Find the Best Hotels

Given three input variables: * |hotels| - a list of hotel names * |ratings| - their ratings in a city * |cutoff| - the rat...

3 months ago

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Crop an Image

A grayscale image is represented as a matrix in MATLAB. Each matrix element represents a pixel in the image. An element value re...

3 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 ...

3 months ago

Solved

Plot Damped Sinusoid

Given two vectors |t| and |y|, make a plot containing a blue ( |b| ) dashed ( |--| ) line of |y| versus |t|. Mark the minimum...

3 months ago

Solved

Verify Law of Large Numbers

If a large number of fair N-sided dice are rolled, the average of the simulated rolls is likely to be close to the mean of 1,2,....

3 months ago

Solved

Check if number exists in vector

Return 1 if number _a_ exists in vector _b_ otherwise return 0. a = 3; b = [1,2,4]; Returns 0. a = 3; b = [1,...

4 months ago