# Christian Schröder

Really enjoying MATLAB!

**Professional Interests:**

**Statistics**

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**Content Feed**

Solved

arithmetic progression

I've written a program to generate the first few terms of <https://en.wikipedia.org/wiki/Arithmetic_progression arithmetic progr...

13 hours ago

Solved

Generate Square Wave

Generate a square wave of desired length, number of complete cycles and duty cycle. Here, duty cycle is defined as the fraction ...

14 hours ago

Solved

Sum of series VII

What is the sum of the following sequence: Σ(km^k)/(k+m)! for k=1...n for different n and m?

14 hours ago

Solved

Sum of series VI

What is the sum of the following sequence: Σk⋅k! for k=1...n for different n?

14 hours ago

Solved

Sum of series V

What is the sum of the following sequence: Σk(k+1) for k=1...n for different n?

14 hours ago

Solved

Sum of series IV

What is the sum of the following sequence: Σ(-1)^(k+1) (2k-1)^2 for k=1...n for different n?

14 hours ago

Solved

Approximation of Pi

Pi (divided by 4) can be approximated by the following infinite series: pi/4 = 1 - 1/3 + 1/5 - 1/7 + ... For a given number of...

14 hours ago

Solved

Largest Geometric Series

Extension of Ned Gulley's wonderful Problem 317. In a geometric series, ratio of adjacent elements is always a constant value. ...

14 hours ago

Solved

Matrix spiral

Make a spiral in a (n*n) matrix. The spiral has to start in the top left, and has to rotate clockwise to the center. The spiral ...

16 hours ago

Solved

Spiral In

Create an m by n matrix filled with sequential integers starting from 1 and arranged in a counterclockwise spiral that hugs the ...

16 hours ago

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...

16 hours ago

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Spot the rectangle (Part 2)

This problem is related to the 17x17 challenge. See also Part 1 of this problem. Given a matrix in which each element is either ...

17 hours ago

Solved

Spot the rectangle

This problem is related to the 17x17 challenge. Given a matrix filled with ones and zeros, determine whether or not any rectangl...

17 hours ago

Solved

Operate on matrices of unequal, yet similar, size

You may want to add a vector to a matrix, implying that the vector is added to each column of the matrix. Or multiply a 3x4x5 ma...

1 day ago

Solved

Permute diagonal and antidiagonal

Permute diagonal and antidiagonal For example [1 2 3;4 5 6;7 8 9] -> [3 2 1;4 5 6;9 8 7] WITHOUT diag function (and variable n...

1 day ago

Solved

Some Assembly Required

The input to this function is a matrix of real numbers. Your job is to assemble the rows of the matrix into one large row that ...

1 day ago

Solved

N-Dimensional Array Slice

Given an N-dimensional array, _A_, an index, _I_, and a dimension, _d_, return the _I_ th elements of _A_ in the _d_ dimension. ...

1 day ago

Solved

Integer sequence - 2 : Kolakoski sequence

Get the n-th term of <https://oeis.org/A000002 Kolakoski Sequence>.

1 day ago

Solved

Golomb's self-describing sequence (based on Euler 341)

The Golomb's self-describing sequence {G(n)} is the only nondecreasing sequence of natural numbers such that n appears exactly G...

1 day ago

Solved

Sum the Infinite Series

Given that 0 < x and x < 2*pi where x is in radians, write a function [c,s] = infinite_series(x); that returns with the...

1 day ago

Solved

Find the stride of the longest skip sequence

We define a _skip sequence_ as a regularly-spaced list of integers such as might be generated by MATLAB's <http://www.mathworks....

1 day ago

Solved

Use a timetable to analyze a train timetable (Part 1)

Oh no, you missed your train to Boston! Find the departure time of the next available train by analyzing the train timetable. Th...

1 day ago

Solved

When Was That Goal Scored?

We want to find out when the goals were scored in a particular soccer game. For each game, we are given a "Goal Event Data" XML ...

1 day ago

Solved

Numerical Integration

Input * |x0|, a real number greater than 0 Output * |I|, a numerical estimate of the integral x0 / I...

1 day ago

Solved

Differential equations I

Given a function handle |f| an initial condition |y0| and a final time |tf|, solve numerically the differential equation dy...

2 days ago

Solved

Monte-Carlo integration

Write a function that estimates a d-dimensional integral to at least 1% relative precision. Inputs: * d: positive integer....

2 days ago