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James


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Naval Surface Warfare Ctr

3,091 total contributions since 2012

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  • Cody 5th Anniversary Author
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  • Introduction to MATLAB Master
  • First Review
  • Computational Geometry IV Master
  • Indexing V Master
  • Project Euler I
  • Draw Letters
  • Cody Problems in Japanese Master
  • Number Manipulation II Master
  • Matrix Patterns III Master

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Mid-term report
You just got your mid-term report, but it's full of ones and twos :(. So before you give it to your parents, you change it, in o...

1 day ago

Solved


Simple Matrix
Make the following matrix without typing it in one by one. [1 2 3; 2 4 6; 4 8 12] x=[1 2 3].

1 day ago

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Box
Give the volume of a box, x is equal to the body diagonal.

1 day ago

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Problem for beginners
Suppose that x is a column vector, with at least a length of 6. Delete the 2., 6., and the second last row. Example: X=[1;2;3...

1 day ago

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Problem for beginners
M is a nxm matrix. Swap the fist and the second last column with eachother. X=[1 2 3;4 5 6;7 8 9] Y=[2 1 3;5 4 6;8 7 9]

1 day ago

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Stairs
Make an n by n matrix, where the elements are ones and zeros. In the main diagonal, and under that, there should be only ones (...

1 day ago

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Square
X is a number, write a code, where Y should be the square of X.

1 day ago

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Matrix problem for beginners
Make a matrix [0,0,0;1,1,1;2,2,2]. X=[0,1,2]

1 day ago

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Find Pseudo-Cyclic Number
A cyclic number is an integer in which cyclic permutations of the digits are successive multiples of the number https://en.wikip...

1 day ago

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Area of rhombus
Calculate the rhombus area

1 day ago

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Optimum Egyptian Fractions
Following problem was inspired by <http://www.mathworks.com/matlabcentral/cody/problems/2126-split-bread-like-the-pharaohs-egypt...

23 days ago

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Pandigital number n°3 (Inspired by Project Euler 32)
After Problem 2319 and 2320. An n-digit number is pandigital if it makes use of all the digits 1 to n exactly ONCE. For examp...

23 days ago

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Square root
Given x (a matrix), give back another matrix, where all the elements are the square roots of x's elements.

23 days ago

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Bridge and Torch Problem - Minimum time
<https://en.wikipedia.org/wiki/Bridge_and_torch_problem Details of the problem ...> Input is crossing time list. (for exampl...

24 days ago

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find

25 days ago

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Multiplying

25 days ago

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divide by 5

25 days ago

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Matrix for beginners
Multiply x and y elemwise.

25 days ago

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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* ...

1 month ago

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RISK Calculator - Large Armies, High Accuracy, Fast
This Challenge is to quickly provide the high precision probability of legal RISK battles up to 100 vs 100. [ Attack >= 2 and D...

1 month ago

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Create a matrix map of increasing safety levels
The sole nuclear power plant at Grid City suddenly had a meltdown. Luckily, the plant was designed to be in full automation, so ...

6 months ago

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Count the number of folds needed to pack a large sheet
In a certain paper factory, large sheets of paper are being made every day. Before sending the sheets for shipment, they have to...

6 months ago

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Convert a temperature reading from Celsius to an unknown scale
Two of the most famous temperature scales are the Celsius and the Fahrenheit scale. In reality, however, there are so many other...

6 months ago

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leap year
find the number of leap years within the given time interval

6 months ago

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Friday or not
I love Friday. Please tell me whether the day is Friday. Dateformat is 'yyyy-mm-dd' or 'dd-mmm-yyyy' or 'mm/dd/yyyy'. Exa...

6 months ago

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Count the days
Count the occurrence of a particular day (e.g. Monday) in a given year.

6 months ago

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Exponentiation
Given 3 integers b,e,k; find -- mod(b^e,k)

6 months ago

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Sieve of Eratosthenes - 02
"Sift the Two's and Sift the Three's, The Sieve of Eratosthenes. When the multiples sublime, The numbers that remain a...

6 months ago

Solved


Projector Matrix
Write a function to determine whether or not the matrix is a projector. Projector matrices are defined as P^2 = P.

6 months ago

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