# Matthew Johnson

Just looking to better my MATLAB skills!

**Professional Interests:**

**Statistics**

**Cody**

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**Content Feed**

Solved

Add two numbers

Calculate the sum of two numbers. Example input = [2 3] output = 5

6 days ago

Solved

Mongean Shuffle

A Mongean shuffle of an n card deck starts with putting the initial deck on the left hand side. * The top card of the deck is...

6 days ago

Solved

Vector creation

Create a vector using square brackets going from 1 to the given value x in steps on 1. Hint: use increment.

6 days ago

Solved

Doubling elements in a vector

Given the vector A, return B in which all numbers in A are doubling. So for: A = [ 1 5 8 ] then B = [ 1 1 5 ...

6 days ago

Solved

Flip the vector from right to left

Flip the vector from right to left. Examples x=[1:5], then y=[5 4 3 2 1] x=[1 4 6], then y=[6 4 1]; Request not ...

6 days ago

Solved

Whether the input is vector?

Given the input x, return 1 if x is vector or else 0.

6 days ago

Solved

Get the length of a given vector

Given a vector x, the output y should equal the length of x.

6 days ago

Solved

Select every other element of a vector

Write a function which returns every other element of the vector passed in. That is, it returns the all odd-numbered elements, s...

6 days ago

Solved

Generate a vector like 1,2,2,3,3,3,4,4,4,4

Generate a vector like 1,2,2,3,3,3,4,4,4,4 So if n = 3, then return [1 2 2 3 3 3] And if n = 5, then return [1 2 2 3 3 3 4...

15 days ago

Solved

Maximum value in a matrix

Find the maximum value in the given matrix. For example, if A = [1 2 3; 4 7 8; 0 9 1]; then the answer is 9.

15 days ago

Solved

Find the sum of all the numbers of the input vector

Find the sum of all the numbers of the input vector x. Examples: Input x = [1 2 3 5] Output y is 11 Input x ...

15 days ago

Solved

Molar Air Density from Temperature and Pressure

The molar density of air can be found from the Temperature and Pressure using the ideal gas law. where the Molar density STP ...

15 days ago

Solved

Air Mass to Star for an Observer at Mean Sea Level

Air mass is a measure of how much atmosphere light from a source above the atmosphere (eg sun, planet, star) has to travel throu...

15 days ago

Solved

Predict Cricket Stridulation Rate from Air Temperature

Stridulation is the process that creates a cricket's “chirp” by rubbing their wings or legs. According to the Old Farmer's Alma...

15 days ago

Solved

Find Air Temperature from Cricket Stridulation Rate

Stridulation is the process that creates a cricket's “chirp” by rubbing their wings or legs. According to the Old Farmer's Alma...

15 days ago

Solved

Time Expansion

How can you slow down any discrete-time signal? Example Input original signal x. x = [1 2 3 -1 -2 -5 -4] We want t...

15 days ago

Solved

Back to basics - mean of corner elements of a matrix

Calculate the mean of corner elements of a matrix. e.g. a=[1 2 3; 4 5 6; 7 8 9;] Mean = (1+3+7+9)/4 = 5

15 days ago

Solved

Find the index of n in magic(n)

If input n=5, then magic(n) is 17 24 1 8 15 23 5 7 14 16 4 6 13 20 22...

15 days ago

Solved

How unique?

Sometimes, when we check unique entries of vector we would like to know how many times each value occurs. Given vector of num...

15 days ago

Solved

Three...is a magic number.

Yes it is... It's a magic number... To help you get rid of that earworm, here's a new Cody problem. You are given a squar...

16 days ago

Solved

compress sequence into intervals

You're given a row vector of monotonically increasing integers most of which are consecutive. Find the upper and lower bounds of...

16 days ago

Solved

Length of a short side

Calculate the length of the short side, a, of a right-angled triangle with hypotenuse of length c, and other short side of lengt...

18 days ago

Solved

Replace pattern 0 1 0 and 1 0 1

Find and replace a pattern in a row of zeroes and ones. * Find 1 0 1 and replace it with 1 1 1 * Find 0 1 0 and replace it w...

19 days ago

Solved

Another colon problem

This is simple problem based on problems 555, 801, 1118, etc. Create an index vector from two input vectors. Example: ...

20 days ago