# ChrisR

I teach courses in water resources and environmental fluid mechanics.

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**Content Feed**

Solved

Non-zero bits in 10^n.

Given an integer that is a power of 10, find the number of non-zero bits, k, in its binary representation. For example: * ...

3 hours ago

Solved

Change on Spiral Matrix

n>=3, generate a matrix of nth such that n^2 is the max number, and max number must be in [1,1] or [end, end]. One example will ...

3 hours ago

Solved

LIFO Validation

Write a function to check whether a LIFO (Last In First Out) restriction on inventory is violated. We have two input vectors ...

12 hours ago

Solved

How to multiply?

* Imagine you are in 3012 Anno Domini, when everyone must learn how to multiply, * and competing for the highly prestigious pos...

3 days ago

Solved

Easy Sequences 18: Set Bits of Triple Summations

The function S(n) is defined by the following triple summations: The double brackets mean that th...

4 days ago

Solved

Create the flag of Ramumbia

The little known nation of Ramumbia has a very simple flag. It is made up of vertical stripes, Red, Green, Blue, that are equall...

4 days ago

Solved

Palindromic Prime

Palindromic Prime is a prime number that is also a palindromic number. (Wiki, OEIS) If given a monotonic series (increment=1) ...

4 days ago

Problem

Multiply binary numbers

Write a function to multiply two binary numbers input as strings. For example, input values of ‘1011’ and ‘101’ should give ’110...

5 days ago | 2 | 4 solvers

Solved

UICBioE240 problem 1.11

Store a series of numbers into a 4 by 4 matrix, starting with the first few positions going right and down, and leaving the rest...

5 days ago

Solved

The perimeter of a circle

Calculate the perimeter of a circle E.g If input r(radius) = 2 , the output( the perimeter of a circle) = 12.5664.

6 days ago

Solved

Relation between functions "dec2bin" & "dec2binvec"

Here it's an easy problem we try to find the relation between the two functions "dec2bin" & "dec2binvec", so here you must write...

7 days ago

Solved

Basic Monte Carlo Simulation

Input is a matrix including service time and probability of service time. Another input is a random number. Function should tran...

8 days ago

Solved

Easy Sequences 9: Faithful Pairs

A "faithful number" is a non-prime number that is one less or one more than some prime number but not both. For example, for num...

8 days ago

Solved

Bisection method of finding a root.

Test the bisection algorithm described in Chapter 5 of Steven C. Chapra's textbook, *Applied Numerical Methods with MATLAB for E...

9 days ago

Solved

False position (linear interpolation) method of finding a root.

Test the false position algorithm described in Chapter 5 of Steven C. Chapra's textbook, *Applied Numerical Methods with MATLAB ...

9 days ago

Solved

Temperature Conversion Utility (Strings)

This is a follow-on problem to <http://www.mathworks.com/matlabcentral/cody/problems/2413-temperature-conversion-utility Problem...

12 days ago

Solved

Matrix to 3-Column Matrix

Consider a matrix *A* such as A = [1 2 3 3 4 5 6; 2 3 4 5 6 7 8]; Can you convert this matrix to a three-column ...

13 days ago

Solved

Moving Product (Easy)

Given an input array A, write a function *movprod(A,k,dim)* to calculate the moving product over a sliding window of length *k* ...

13 days ago

Solved

Vogel-Dobbener entropy

*Vogel-Dobbener entropy* is a measure of dispersion for ordinal variables. Given an ordered list of distinct observations u_...

13 days ago

Solved

Cody Problems in French : Trouvez la logique Pt.1

On rentre x = 4 et il en sort y = 160. Trouvez la logique entre x et y, aidez-vous de la test suite. Bon courage. P.S: L'...

14 days ago

Solved

Cody problems in French : Trouvez la logique Pt.2

Trouvez la logique entre x et y, aidez-vous de la test suite. Bon courage. P.S: L'utilisation de "^" est de nouveau fortement...

14 days ago

Solved

Find the complement of a number in binary

Input x is a decimal number and output y is the complement of binary representation of x. For example, x = 10 has the binary ...

14 days ago

Problem

Count the primes in Collatz sequences

Several Cody problems (21, 69, 42937, 44448, 44784, 52422) involve Collatz sequences. These start with a seed . If is odd, the ...

14 days ago | 1 | 5 solvers

Solved

Create array of all Distances between two Sets of Points

This Challenge is a subsection of Martian Pranks based on Tim's efficient Distance calculation between sets of points. Given Po...

14 days ago

Solved

Filter British English into American English

Given a sentence written with British spelling, return the sentence with the offending word(s) replaced with the American spelli...

15 days ago

Solved

What is the nth step in Conway's Life?

Based on <Problem 52. What is the next step in Conway's Life?> Generalize your solution to Problem 52 - Give the state of the...

15 days ago

Solved

Find the first N zeros of the 666 function

Using the following definition of the 666 function for this problem: _f(n)=sin('nnn')-cos(n*n*n)_, write a function that returns...

15 days ago