# ChrisR

I teach courses in water resources and environmental fluid mechanics.

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**Content Feed**

Solved

Stress-Strain Properties - 8

Up to this point, you've calculated some material properties based on tensile stress-strain data. For this problem, you are task...

circa 23 ore ago

Solved

Stress-Strain Properties - 7

The toughness of a material is technically defined as the plastic strain energy absorbed by the material (the olive region in th...

2 giorni ago

Solved

Community Problem 500!

In honor of this being the 500th Community problem, see if you can create a function that has a Cody size of 500. It can do any...

2 giorni ago

Solved

Find index of a string in a cell array

Write a function that finds the index at which the cell array of strings C contains the exact string S. So if C = {'twe...

2 giorni ago

Solved

Find neighbor triangle indices

First input T is a triangulation (triplet list of indices -positive integers-, each index refering to a vertex number in a corre...

3 giorni ago

How do I subtract every row of a matrix with every row of a second matrix?

Here's how I understood the question. If you have A = magic(3) and B = eye(3)--that is, A = [8 1 6; 3 5 7; 4 9 2]; B = [1 0 ...

3 giorni ago | 0

| accepted

Solved

Code Wheel

Create a function that offsets each value in a given string by a given amount. For instance, codewheel('hello',1) s...

3 giorni ago

Solved

Dimensions of Spaces

Find the dimension of the column space, null space, row space, and left null space for any matrix. Example input A=[1 2 ...

3 giorni ago

Solved

Largest Geometric Series

Extension of Ned Gulley's wonderful <http://www.mathworks.com/matlabcentral/cody/problems/317 Problem 317>. In a geometric se...

4 giorni ago

Solved

row-th maximum row elements

Input a is a square matrix of size n*n. Output vector v is of size 1*n. The ith element of output v is the ith largest element o...

14 giorni ago

Problem

Compute the largest number whose prime factors sum to n

This problem deals with a sequence whose tenth term is 36 because the prime factors of 36 (2, 2, 3, 3) sum to 10. The number 32 ...

14 giorni ago | 1 | 4 solvers

Solved

Kaggle: Reverse Game of Life - Single Move to One Cell Case

<http://www.kaggle.com/c/conway-s-reverse-game-of-life Kaggle's Conway's Reverse Game of Life> contest inspires this Single Reve...

17 giorni ago

Problem

List the cuban primes

The number 61 is a cuban prime because it is prime and the difference two cubes, 64 and 125. Write a function to list the cuba...

18 giorni ago | 1 | 4 solvers

Solved

Twist 'n' Match

Given n and m, construct an n-by-n matrix a such that a, when rotated 90 degrees and compared with itself, matches itself in exa...

18 giorni ago

Solved

Poly2mask, drawpolygon or patch

Recently, I tried to plot a polygon in matlab, and I found there is a lot of embedded function that can be used. However, some f...

23 giorni ago

Solved

Clock Solitaire

Many card players will be familiar with the game of <http://en.wikipedia.org/wiki/Clock_patience Clock Solitaire>. Briefly, th...

24 giorni ago

Solved

Poker Card Deal!

Anyone want to play a card game? Well this is making one deck of cards, with the option of using 2 jokers. The outputs are ...

25 giorni ago

Solved

Combine Cards to make 21

Given between two and six cards, e.g. A _ 3 _ 7 _ 6 _ 2 place one of the mathematical symbols (+,-,*,/) in the space betw...

27 giorni ago

Solved

Easy Sequences 31: N-N's Sequence

We define the N-N's Sequence, as the series of all positive integers in ascending order and with repetition, wherein a appears ...

29 giorni ago

Solved

Godfather or Goodfather

Recently, I watched the movie called the Godfather. In my opinoin, Vito Corleone is not just a godfather, he is also a good fat...

29 giorni ago

Solved

Easy Sequences 28: Sum of Radicals of Integers

The radical of a positive integer is defined as the product of the distinct prime numbers dividing . For example, the distinct ...

30 giorni ago

Solved

Binpack Contest: Retro

The <http://www.mathworks.com/matlabcentral/contest/contests/3/rules Full Binpack Rules and examples>. This Challenge is a re...

circa un mese ago

Solved

Coin distribution

Imagine, u r in a shop. ur bill is n(2200). u want to pay the bill with minimum no of coins u have. u've coins of - 2000,1000...

circa un mese ago

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. ...

circa un mese ago

Solved

Easy Sequences 25: Product of Series

The function 'P(n)' is defined as the series product: where 'T(n)' is the triangular sum: ...

circa un mese ago

Solved

GJam 2017 Kickstart: Leader (Small)

This Challenge is derived from <http://code.google.com/codejam/contest/6304486/dashboard#s=p0 GJam 2017 Kickstart Leader>. This ...

circa un mese ago