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Word Counting and Indexing
You are given a list of strings, each being a list of words divided by spaces. Break the strings into words, then return a maste...

mer än 2 år ago

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Interpolator
You have a two vectors, a and b. They are monotonic and the same length. Given a value, va, where va is between a(1) and a(end...

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Replace Nonzero Numbers with 1
Given the matrix x, return the matrix y with non zero elements replaced with 1. Example: Input x = [ 1 2 0 0 0 ...

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Matrix multiplication across rows
Given matrix m, return matrix n such that, rows of n are result of multiplication of the rows of the input matrix Example ...

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A matrix of extroverts
Now that the introverts have had their script, the extroverts spoke up (naturally!) and demanded one as well. You will be given...

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Convert matrix to 3D array of triangular matrices
Given a 2D numeric array x in which each column represents the vectorized form of an upper triangular matrix, return a 3D array ...

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Question


Why is a regular expression used in this code?
I found a code to dump zero rows/columns in the southeast part of a given matrix: function b = ZeroDumping(a) regexp '' '(?...

mer än 2 år ago | 1 answer | 0

1

answer

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Too Many Zeros, Dump Them!
Sometimes when I create a matrix, I use this syntax: a = zeros(1000,1000); But when the function ends, I find that I don'...

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Enlarge array
Given an m-by-n numeric array (A) and a 1-by-2 vector (sz) indicating the dimensions [p q] to enlarge each element, return an (m...

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Remove entire row and column in the matrix containing the input values
Remove the entire row and column from the matrix containing specific values. The specified value can be a scalar or a vector. Fo...

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frame of the matrix
Given the matrix M, return M without the external frame.

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subtract central cross
Given an n-by-n square matrix, where n is an odd number, return the matrix without the central row and the central column.

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Question


How to use a optimization toolbox in MATLAB Cody problem?
I'm trying to solve one problem in Cody, but a function 'fmincon' is not recognized by the online compiler. Is there any way to ...

mer än 2 år ago | 1 answer | 0

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Given a matrix, swap the 2nd & 3rd columns
If a = [1 2 3 4; 1 2 3 4; 1 2 3 4; 1 2 3 4]; then the result is ans = 1 3 2 4 1 3 2...

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matrix zigzag
Unfold a 2-D matrix to a 1-D array in zig-zag order, e.g., for matrix [ 1 2 3 ; 4 5 6 ; 7 8 9 ] the resulting 1-...

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Question


Why do I get a wrong plot?
I'd like to make a plot of a quantity called "PSF" but I cannot get a correct result for some reason. I will first explain the t...

mer än 2 år ago | 1 answer | 0

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Calculate Amount of Cake Frosting
Given two input variables |r| and |h|, which stand for the radius and height of a cake, calculate the surface area of the cake y...

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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:...

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Question


How to fix the GPU warning?
Hello, I'm trying to use GPU libraries (especially, gpuArray) on an HPC cluster but I constatnly get an error below: --- Wa...

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Answered
imresize error. "Expected input method to be a string or a character vector. Allowed values are: 'cubic' or 'bicubic'."
I could solve this problem by retrieving the array from the GPU by gather function. grayImage = gather(gpu_grayImage); grayI...

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imresize error. "Expected input method to be a string or a character vector. Allowed values are: 'cubic' or 'bicubic'."
I get the error message: Expected input method to be a string or a character vector. Allowed values are: 'cubic' or 'bicubic'...

mer än 2 år ago | 3 answers | 0

3

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Question


How to make the negative sign in the legend easier to see?
I generated the following legend in my plot but the negative sign ('-') is hard to see. I tried several different fonts but it d...

mer än 2 år ago | 2 answers | 0

2

answers