# Christian Schröder

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Really enjoying MATLAB!

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Solved

Convert RGB to Grayscale

Convert a 3 element RGB array to its correspoding grayscale pixel (a scalar) *Hint: a formula exists!

6 hours ago

Solved

Palindrome Checker

Check to see if a given string is a palindrome (a word, phrase, or sequence that reads the same backward as forward). Output sh...

6 hours ago

Solved

Reverse a string

Return a string with the characters in reverse order from a given input string Ex: my_str = "Ciao" function should output "...

6 hours ago

Solved

Sum All Positive Elements

Output a scalar that is equal to the sum of all positive elements in a given vector/matrix. For Example: The sum of all positi...

19 hours ago

Solved

Diagonal Product of A Square Matrix

For a matrix A, calculate the product of its diagonal elements. * Assume all input matrices are square & corresponding element...

19 hours ago

Solved

Given two arrays, find the maximum overlap

Given two (integer) arrays s1 and s2, create a new array s3 which is as short as possible and contains both arrays. #1 s1 = [...

6 days ago

Solved

Power Times (of the day)

Many times throughout the day can represent mathematical equations. In this problem, we focus on times that represent powers. Fo...

13 days ago

Solved

Compute the totient summatory function

Cody Problem 656 deals with the totient function, denoted by which counts the numbers less than that are relatively prime to ....

13 days ago

Solved

ICFP2024 011:Lambdaman Small programmed solutions

The ICFP2024 contest was held June29 thru July 1. The contest consisted of five parts: ICFP Language, Lambdaman maze, Starship f...

14 days ago

Solved

Sum the reciprocals of polygonal numbers

As explained in Cody Problem 60571, a polygonal number is the number of dots arranged in the shape of a regular polygon. For exa...

15 days ago

Solved

ICFP2024 010: Lambdaman Optimal-Crawler-Backfill

The ICFP2024 contest was held June29 thru July 1. The contest consisted of five parts: ICFP Language, Lambdaman maze, Starship f...

15 days ago

Solved

ICFP2024 008: Lambdaman4 Breadth Solver

The ICFP2024 contest was held June29 thru July 1. The contest consisted of five parts: ICFP Language, Lambdaman maze, Starship f...

15 days ago

Solved

ICFP2024 009: Lambdaman Crawler-Backfill

The ICFP2024 contest was held June29 thru July 1. The contest consisted of five parts: ICFP Language, Lambdaman maze, Starship f...

15 days ago

Solved

ICFP2024 007: Lambdaman 1, 2, 3 Breadth Solver

The ICFP2024 contest was held June29 thru July 1. The contest consisted of five parts: ICFP Language, Lambdaman maze, Starship f...

15 days ago

Solved

ICFP2024 005: Lambdaman 1, 2, 3

The ICFP2024 contest was held June29 thru July 1. The contest consisted of five parts: ICFP Language, Lambdaman maze, Starship f...

26 days ago

Solved

ICFP2024 006: Lambda 21 - 3D

The ICFP2024 contest was held June29 thru July 1. The contest consisted of five parts: ICFP Language, Lambdaman maze, Starship f...

26 days ago

Solved

Complete a 2nd order difference sequence

In Cody Problem 59791 ChrisR asks us to find the integer that completes a randomly sorted geometric sequence with one missing el...

26 days ago

Solved

ICFP2024 004: Lambdaman 10

The ICFP2024 contest was held June29 thru July 1. The contest consisted of five parts: ICFP Language, Lambdaman maze, Starship f...

27 days ago

Solved

ICFP2024 003: Lambdaman 5

The ICFP2024 contest was held June 29 thru July 1. The contest consisted of five parts: ICFP Language, Lambdaman maze, Starship ...

28 days ago

Solved

ICFP2024 002: Lambdaman 9

The ICFP2024 contest was held June29 thru July 1. The contest consisted of five parts: ICFP Language, Lambdaman maze, Starship f...

29 days ago

Solved

ICFP2024 001: Lambdaman 6

The ICFP2024 contest was held June29 thru July 1. The contest consisted of five parts: ICFP Language, Lambdaman maze, Starship f...

29 days ago

Solved

List primes of the form xy+z

Consider three consecutive integers , , and . When is the number prime? For example, if or , then the results are 17 and 37, ...

1 month ago

Solved

Perimeter of a Koch snowflake

A Koch snowflake is an iteratively generated (fractal) shape built out of successively smaller equilateral triangles by followin...

1 month ago

Solved

Find polygonal numbers that are Blum integers

A polygonal number is the number of dots arranged in the shape of a regular polygon. For example, 15 is a triangular number beca...

1 month ago

Solved

Given a Polyshape_01 (ps) Return its Perimeter, Area, and Centroid.

Return the perimeter (P) of a polyshape object, which is the sum of the lengths of its boundaries. Return the total area (A) of...

1 month ago

Solved

Jigsaw 002: Intro 2x2 square. Local Cody images

This challenge is to re-assemble camerman.tif and other grayscale images from four 128x128 pieces into a 256x256 image. The prop...

1 month ago

Solved

Determine whether a number is a Blum integer

A Blum integer is a semiprime—that is, the product of two distinct primes—whose factors have the form for some integer . The nu...

1 month ago

Question

Output of irf() for VAR models when estimation data is in a matrix or a timetable

Hello, I'm estimating a K-dimensional VAR model and looking at IRFs for structural (orthogonalized shocks) using the Econometri...

2 months ago | 0 answers | 0

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answersSolved

Rotate matrix 60 degrees

Given a 2*m-1 by 4*m-3 matrix in which certain elements form a hexagon of side length m, rotate the hexagon 60 degrees countercl...

2 months ago

Solved

Compute the number of squares a knight can reach after n moves

Several Cody problems involve knights from chess. They have asked players to find a knight’s tour in a matrix (CP 96), determine...

2 months ago