ChrisR
I teach courses in water resources and environmental fluid mechanics.
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Provide your first answer ever to someone else's question
Awarded to ChrisR on 25 Oct 2021
Solve all the problems in Sequences & Series II
Awarded to ChrisR on 23 Oct 2021
Matrix Patterns I Master
Awarded to ChrisR on 09 Oct 2021
Solve all the problems in Cody5:Easy
Awarded to ChrisR on 05 Jun 2021
Solve all the problems in Functions I
Awarded to ChrisR on 29 Apr 2021
Solve all the problems in Divisible by x
Awarded to ChrisR on 11 Apr 2021
Solve all the problems in Tiles Challenge
Awarded to ChrisR on 24 Mar 2021
Solve all the problems in Matrix Patterns III problem group
Awarded to ChrisR on 06 Dec 2020
Solve all the problems in Strings I
Awarded to ChrisR on 02 Oct 2020
Receive 25 likes on a problem you have created
Awarded to ChrisR on 28 Sep 2020
Solve all the problems in Cody Problems in Japanese problem group
Awarded to ChrisR on 26 Aug 2020
Like a problem or solution
Awarded to ChrisR on 12 Aug 2020
Content Feed
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...
alrededor de 8 horas 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...
alrededor de 9 horas 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...
alrededor de 9 horas 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...
1 día 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 ...
1 día ago | 0
Solved
Code Wheel
Create a function that offsets each value in a given string by a given amount. For instance, codewheel('hello',1) s...
1 día 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 ...
2 días 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...
3 días 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...
12 días 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 ...
12 días 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...
16 días 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...
16 días 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...
17 días 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...
22 días 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...
22 días 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 ...
24 días 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...
25 días 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 ...
27 días 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...
27 días 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 ...
28 días 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...
28 días 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...
29 días 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. ...
30 días 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: ...
alrededor de 1 mes 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 ...
alrededor de 1 mes ago
Solved
Easy Sequences 23: Hat Guessing Game!
Consider the following Game Show: Hats, with numbers written on each, were placed on the heads of the participants. Participant...
alrededor de 1 mes ago
