# Daniel

### University Hospital of Marburg

Professional Interests: medical physics (radiotherapy, radiology), image processing

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Risolto

Find the sum of the elements in the "second" diagonal

Find the sum of the elements in the diagonal that starts at the top-right corner and ends at the bottom-left corner.

circa 11 anni fa

Risolto

Project Euler: Problem 6, Natural numbers, squares and sums.

The sum of the squares of the first ten natural numbers is, 1^2 + 2^2 + ... + 10^2 = 385 The square of the sum of the first ...

circa 11 anni fa

Risolto

Filter AC, pass DC

Input x is the sampled signal vector, may have both AC and DC components. Output vector y should not contain any AC component. ...

circa 11 anni fa

Risolto

Swap the input arguments

Write a two-input, two-output function that swaps its two input arguments. For example: [q,r] = swap(5,10) returns q = ...

circa 11 anni fa

Risolto

Solve the Sudoku Row

*Description* A simple yet tedious task occurs near the end of most Sudoku-solving algorithms, computerized or manual. The ta...

circa 11 anni fa

Risolto

Make one big string out of two smaller strings

If you have two small strings, like 'a' and 'b', return them put together like 'ab'. 'a' and 'b' => 'ab' For extra ...

circa 11 anni fa

Risolto

Bottles of beer

Given an input number representing the number of bottles of beer on the wall, output how many are left if you take one down and ...

circa 11 anni fa

Risolto

Project Euler: Problem 1, Multiples of 3 and 5

If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23...

circa 11 anni fa

Risolto

Reverse the vector

Reverse the vector elements. Example: Input x = [1,2,3,4,5,6,7,8,9] Output y = [9,8,7,6,5,4,3,2,1]

circa 11 anni fa

Risolto

Remove DC

Input x is the sampled signal vector, may have both AC and DC components. Output y should not contain any DC component. Examp...

circa 11 anni fa

Risolto

Is my wife right? Now with even more wrong husband

Again, as in "Is my wife right?" ( <http://www.mathworks.com/matlabcentral/cody/problems/149-is-my-wife-right> ), answer 'yes' r...

circa 11 anni fa

Risolto

The Tower of Hanoi

In the <http://en.wikipedia.org/wiki/Tower_of_Hanoi Tower of Hanoi problem> with 3 rods (1, 2 & 3), the goal is to move a tower ...

circa 11 anni fa

Risolto

Are you in or are you out?

Given vertices specified by the vectors xv and yv, and a single point specified by the numbers X and Y, return "true" if the poi...

circa 11 anni fa

Risolto

Program an exclusive OR operation with logical operators

Program an exclusive or operation *without* using the MATLAB function xor. Use logical operators like |, &, ~, ... instead. ...

circa 11 anni fa

Risolto

Pull the variable y_correct from the Caller's Workspace

*Description* This highlights a very easy to use and high-scoring cheat that can be used on almost all Cody questions.

circa 11 anni fa

Risolto

Sum all integers from 1 to 2^n

Given the number x, y must be the summation of all integers from 1 to 2^x. For instance if x=2 then y must be 1+2+3+4=10.

circa 11 anni fa

Risolto

Love triangles

Given a vector of lengths [a b c], determines whether a triangle with non-zero area (in two-dimensional Euclidean space, smarty!...

circa 11 anni fa

Risolto

Counting Sequence

Given a vector x, find the "counting sequence" y. A counting sequence is formed by "counting" the entries in a given sequence...

circa 11 anni fa

Risolto

Maximum running product for a string of numbers

Given a string s representing a list of numbers, find the five consecutive numbers that multiply to form the largest number. Spe...

circa 11 anni fa

Risolto

Indexed Probability Table

This question was inspired by a Stack Overflow question forwarded to me by Matt Simoneau. Given a vector x, make an indexed pro...

circa 11 anni fa

Risolto

Nearest

*Description* Find the value and index of the element in vector _x_ that is nearest to value _y_. _y_ should be able to be a ...

circa 11 anni fa

Risolto

random picture with random colours

write a function which creates a random(x,y) matrix with random RGB colours for example create_pic(5,5) gives us a 3d matrix. ...

circa 11 anni fa

Risolto

Omit columns averages from a matrix

Omit columns averages from a matrix. For example: A = 16 2 3 13 5 11 10 8 9 7 ...

circa 11 anni fa

Risolto

Double Deal

*Description* Given an input vector _v_, return the first element as the first output, the second element as the second outpu...

circa 11 anni fa

Risolto

Distance walked 3D

suppose you go from x-y-z coordinates [3,4,2] to [0,0,2] to [0,1,2] to [1,1,2], to [1,1,20] then you walked 25 units of distance...

circa 11 anni fa

Risolto

Tell me the slope

Tell me the slope, given a vector with horizontal run first and vertical rise next. Example input: x = [10 2];

circa 11 anni fa

Risolto

wait for me

wait exactly x seconds please, need not be more than 2 seconds but must be accurate within say 50 milliseconds, your function mu...

circa 11 anni fa