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Michael Völker


22 total contributions since 2011

Professional Interests: signal processing in MRI

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Answered
To find the maximum value in a matrix?
Starting in R2018b, you can use the following command to find the maximum over all elements in an array A: M = max(A,’all’)...

mehr als ein Jahr ago | 15

| accepted

Submitted


A safety net for MATLAB's clear command
intercept amok calls to clear() in interactive mode

mehr als 4 Jahre ago | 0 downloads |

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Answered
how do I plot one channel of data when I have 100 channels?
data = randn(100,300); % bad example for actual data channel = 76; % select channel to plot figure, plot(...

mehr als 6 Jahre ago | 0

| accepted

Submitted


simulate motion in Cartesian MRI
Simulates Point Spread Function (PSF) and k-space data for motion in Cartesian sequences.

mehr als 6 Jahre ago | 5 downloads |

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Submitted


MRI Partial Fourier reconstruction with POCS
Fast and robust reconstruction of Cartesian partial Fourier MRI data with POCS

etwa 7 Jahre ago | 11 downloads |

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Submitted


hypersphere / n-sphere
Generate n-dimensional Ellipsoid or Sphere

mehr als 7 Jahre ago | 2 downloads |

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Submitted


Execute default function of a MATLAB installation
Execute the default function available as an m-file in MATLAB's installation directory.

mehr als 7 Jahre ago | 0 downloads |

Submitted


sub2allind
convert subscripts to ALL corresponding indices

etwa 8 Jahre ago | 1 download |

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Solved


Finding Perfect Squares
Given a vector of numbers, return true if one of the numbers is a square of one of the other numbers. Otherwise return false. E...

etwa 8 Jahre ago

Solved


Triangle Numbers
Triangle numbers are the sums of successive integers. So 6 is a triangle number because 6 = 1 + 2 + 3 which can be displa...

etwa 8 Jahre ago

Solved


Summing digits
Given n, find the sum of the digits that make up 2^n. Example: Input n = 7 Output b = 11 since 2^7 = 128, and 1 + ...

etwa 8 Jahre ago

Solved


Remove the vowels
Remove all the vowels in the given phrase. Example: Input s1 = 'Jack and Jill went up the hill' Output s2 is 'Jck nd Jll wn...

etwa 8 Jahre ago

Solved


Select every other element of a vector
Write a function which returns every other element of the vector passed in. That is, it returns the all odd-numbered elements, s...

etwa 8 Jahre ago

Solved


Swap the first and last columns
Flip the outermost columns of matrix A, so that the first column becomes the last and the last column becomes the first. All oth...

etwa 8 Jahre ago

Solved


Column Removal
Remove the nth column from input matrix A and return the resulting matrix in output B. So if A = [1 2 3; 4 5 6]; and ...

etwa 8 Jahre ago

Solved


Make the vector [1 2 3 4 5 6 7 8 9 10]
In MATLAB, you create a vector by enclosing the elements in square brackets like so: x = [1 2 3 4] Commas are optional, s...

etwa 8 Jahre ago

Solved


Who Has the Most Change?
You have a matrix for which each row is a person and the columns represent the number of quarters, nickels, dimes, and pennies t...

etwa 8 Jahre ago

Solved


Find all elements less than 0 or greater than 10 and replace them with NaN
Given an input vector x, find all elements of x less than 0 or greater than 10 and replace them with NaN. Example: Input ...

etwa 8 Jahre ago

Solved


Make a checkerboard matrix
Given an integer n, make an n-by-n matrix made up of alternating ones and zeros as shown below. The a(1,1) should be 1. Example...

etwa 8 Jahre ago

Solved


Determine if input is odd
Given the input n, return true if n is odd or false if n is even.

etwa 8 Jahre ago

Solved


Find the sum of all the numbers of the input vector
Find the sum of all the numbers of the input vector x. Examples: Input x = [1 2 3 5] Output y is 11 Input x ...

etwa 8 Jahre ago

Submitted


vectorized fibonacci
Given any integer array n, compute an array with the nth fibonacci numbers.

etwa 9 Jahre ago | 1 download |