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Christian Schröder


Aktiv seit 2019

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Really enjoying MATLAB!

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  • MATLAB Central Treasure Hunt Finisher
  • Knowledgeable Level 1
  • Thankful Level 2
  • Divisible by x Master
  • Curator
  • First Review
  • Puzzler
  • Number Manipulation I Master
  • Tiles Challenge Master
  • Strings III Master
  • Strings II Master
  • Strings I Master

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Times 2 - START HERE
Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...

2 Tage vor

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Divisible by n, Composite Divisors
Pursuant to <http://www.mathworks.com/matlabcentral/cody/problems/42453-divisible-by-n-prime-vs-composite-divisors Divisible by ...

3 Tage vor

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Divisible by n, Truncated-number Divisors
Some divisors only require a few numbers at the end of the number in question to determine divisibility, no matter how long. Exa...

3 Tage vor

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Divisible by n, prime divisors from 20 to 200
Pursuant to the previous problem (linked below), this problem requires a function that checks for divisibility of large numbers ...

3 Tage vor

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Divisible by n, prime divisors - 11, 13, 17, & 19
Divisibility checks against prime numbers can all be accomplished with the same routine, applied recursively, consisting of add ...

4 Tage vor

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EZ
EZ

7 Tage vor

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EZZ
EZZ

7 Tage vor

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EZ4

7 Tage vor

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EZ5
EZ5

7 Tage vor

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EZ6

7 Tage vor

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Identify points inside a Reuleaux triangle
Write a function to identify points that lie in or on a Realeaux triangle, which is a curve of constant width. The input to the ...

9 Tage vor

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Determine whether a number is a Ludic prime
Ludic numbers are formed by a sieve. Start with a list of the positive integers. Skip 1 and start with 2. Then delete every seco...

10 Tage vor

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add
add

16 Tage vor

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x = 1
x = 1

16 Tage vor

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Sum along each diagonal of a matrix
Write a routine that returns the sums along the diagonals of a given matrix, A, where the first diagonal is the bottom left corn...

21 Tage vor

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Find the closest canyon prime
My wife and I celebrated our honeymoon and most recent anniversary in Yellowstone and Grand Teton National Parks. After returnin...

22 Tage vor

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List composite numbers that do not contain their prime factors as substrings
The number 63 has the prime factorization 3, 3, and 7, and it contains one of them (3) as a substring. In contrast, the number 4...

29 Tage vor

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Build a block Toeplitz matrix
A symmetric block Toeplitz matrix has the form, where the are compatibly-sized matrices. Write a routi...

etwa ein Monat vor

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Condition number of Kronecker product
Given NxN matrix A and MxM matrix B, where M,N<=1000, write a routine to compute the condition number of kron(A,B).

etwa ein Monat vor

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TingTing
Output logical "true" if the input is the answer to luck and money$$$. Otherwise, output logical "false".

etwa ein Monat vor

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The Prime Days of Christmas
On the first day of Christmas my true love sent to me partridges in a pear tree. On the second day of Christmas my true love s...

etwa ein Monat vor

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Extract diagonal of sparse quadratic form
Consider the matrix A and vector v given by, A=round(sprand(5e3,1e4,1/1e4*100)*100); v=randi(10,width(A),1); Write a rout...

etwa ein Monat vor

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2x2 binning of a large sparse matrix
Consider the 20000 x 20000 sparse matrix, A=round(sprand(2e4,2e4,1/1e4*100)*1000); The task is to divide this matrix into 2x...

etwa ein Monat vor

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Pipeline - Variable-length Input
Design the |gt|(>) method of |function_handle| so that: >> 1 > @sin > @cos ans = 0.666366745392881 >> cos(sin(1...

etwa ein Monat vor

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area of a square
find the generic solution for an area of a square

etwa ein Monat vor

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List the partitions of an integer
Several Cody problems deal with partitions of an integer, or the ways an integer can be written as the sum of positive numbers—...

etwa ein Monat vor

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Area of a rectangle
FInd the area of a rectangle with a length L and width W. Round to the nearest integer.

etwa 2 Monate vor

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Sequencing Odd Even numbers
Given an input value n, create a vector which contains all odd numbers & even numbers centered around mean of vector. If the me...

etwa 2 Monate vor

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Extend the digamma function to negative arguments
While solving one of Ramon Villamangca’s problems, I needed the value of , where is the digamma function. However, MATLAB’s fun...

etwa 2 Monate vor

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Describe n from right to left
If you were to describe the number 46 from right to left, you could say “one 6, one 4”, or 1614. The number 8663 would be “one 3...

etwa 2 Monate vor

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