Mark Wagshul

Albert Einstein College of Medicine

Last seen: 11 mois il y a | Actif depuis 2013

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How do I convert an array into a set of indices using colon notation?
I have two 4D matrices. Each is approximately 150 x 150 x 150 x 3 (the "3" is exact in both matrices). The 4th dimension in Ma...

presque 9 ans il y a | 1 réponse | 1

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Question

What is the most efficient way to fill a 4D array?
I would like to fill a 4D array as follows, give a 4D array shift1: newShift(j,k,l,1:3) = constant + [j k l] + shift1(j,k,l...

environ 9 ans il y a | 2 réponses | 0

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A résolu

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...

plus de 13 ans il y a

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Weighted average
Given two lists of numbers, determine the weighted average. Example [1 2 3] and [10 15 20] should result in 33.333...

plus de 13 ans il y a

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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...

plus de 13 ans il y a

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Replace NaNs with the number that appears to its left in the row.
Replace NaNs with the number that appears to its left in the row. If there are more than one consecutive NaNs, they should all ...

plus de 13 ans il y a

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Determine whether a vector is monotonically increasing
Return true if the elements of the input vector increase monotonically (i.e. each element is larger than the previous). Return f...

plus de 13 ans il y a

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Add two numbers
Given a and b, return the sum a+b in c.

plus de 13 ans il y a

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Nearest Numbers
Given a row vector of numbers, find the indices of the two nearest numbers. Examples: [index1 index2] = nearestNumbers([2 5 3...

plus de 13 ans il y a

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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...

plus de 13 ans il y a

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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...

plus de 13 ans il y a

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

plus de 13 ans il y a

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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 ...

plus de 13 ans il y a

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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 ...

plus de 13 ans il y a

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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...

plus de 13 ans il y a

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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 ...

plus de 13 ans il y a

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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:...

plus de 13 ans il y a

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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...

plus de 13 ans il y a

Réponse apportée
Real time pixel position in a GUI
Thanks, but that will only display the pixel position and image value in the window (bottom of the figure). I need to have acce...

plus de 13 ans il y a | 0

Question

Real time pixel position in a GUI
I have a series of images which change as a function of time (i.e. a 3D matrix, two spatial, one time). I would like to display...

plus de 13 ans il y a | 3 réponses | 1

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