Gelöst

Matrix indexing with two vectors of indices
Given a matrix M and two index vectors a and b, return a row vector x where x(i) = M(a(i),b(i)).

11 Monate vor

Gelöst

Getting logical indexes
This is a basic MATLAB operation. It is for instructional purposes. --- Logical indexing works like this. thresh = 4...

11 Monate vor

Gelöst

Reindex a vector
You are given two vectors of equal length. Vector N has numeric values (no Inf or NaN) while vector IDX has integers. Place th...

11 Monate vor

Gelöst

Remove the two elements next to NaN value
The aim is to *remove the two elements next to NaN values* inside a vector. For example: x = [6 10 5 8 9 NaN 23 9 7 3 21 ...

11 Monate vor

Gelöst

Set the array elements whose value is 13 to 0
Input A either an array or a vector (which can be empty) Output B will be the same size as A . All elements of A equal to 13...

11 Monate vor

Gelöst

Fill a zeros matrix
The aim is to fill an array of all zeros given a numerical value and the index of row and columns for this value. 3 Inputs: ...

11 Monate vor

Gelöst

Get the elements of diagonal and antidiagonal for any m-by-n matrix
In the problem <http://www.mathworks.com/matlabcentral/cody/problems/858-permute-diagonal-and-antidiagonal Problem 858. Permute ...

11 Monate vor

Gelöst

We love vectorized solutions. Problem 1 : remove the row average.
Given a 2-d matrix, remove the row average from each row. Your solution MUST be vectorized. The solution will be tested for ac...

11 Monate vor

Gelöst

Replicate elements in vectors
Replicate each element of a row vector (with NaN) a constant number of times. Examples n=2, A=[1 2 3] -> [1 1 2 2 3 3] n=0...

11 Monate vor

Gelöst

Generate N equally spaced intervals between -L and L
Given N and L, return a list of numbers (in ascending order) that divides the interval [-L L] into N equal-length segments. For...

11 Monate vor

Gelöst

intersection of matrices
Given two matrices filled with ones and zeros, determine if they share a common row, column entry. These matrices are of identic...

11 Monate vor

Gelöst

Return a list sorted by number of consecutive occurrences
Inspired by Problem 38 by Cody Team. Given a vector x, return a vector y of the values in x sorted by the number of CONSECUTIVE ...

11 Monate vor

Gelöst

Return unique values without sorting
If the input vector A is [42 1 1], the output value B must be the unique values [42 1] The values of B are in the same order a...

11 Monate vor

Discussion

No links available in the view of preferred community solutions
The all-community-solutions view shows the ID of each solution, and you can click on the link to go to the solution. The prefer...

11 Monate vor | 0

Gelöst

First non-zero element in each column
For a given matrix, calculate the index of the first non-zero element in each column. Assuming a column with all elements zero i...

11 Monate vor

Discussion

Solution maps shown with incorrect colors
I'm seeing solution maps shown with low-contrast gray colors instead of the correct symbol colors. I have observed this using bo...

11 Monate vor | 0

Gelöst

Getting the indices from a matrix
Inspired by Problem 645. Getting the indices from a matrix. Given a matrix A (or a vector), return the indices (always in row...

11 Monate vor

Discussion

Math rendering seems broken in Cody problem descriptions
Here is a screenshot of a Cody problem that I just created. The math rendering is poor. (I have since edited the problem to remo...

11 Monate vor | 0

Problem

Create 24-bit image containing all possible colors
A 24-bit image is an image where each pixel is represented by three values, which are the red, green, and blue color components,...

11 Monate vor | 0 | 52 Lösungsvorschläge

Gelöst

Longest run of consecutive numbers
Given a vector a, find the number(s) that is/are repeated consecutively most often. For example, if you have a = [1 2 2 2 1 ...

11 Monate vor

Gelöst

Piecewise linear interpolation
Given an Mx2 vector and a row of M-1 integers, output a two column vector that linearly interpolates Y times between each succes...

11 Monate vor

Gelöst

Convert given decimal number to binary number.
Convert given decimal number to binary number. Example x=10, then answer must be 1010.

11 Monate vor

Gelöst

Height of a right-angled triangle
Given numbers a, b and c, find the height of the right angled triangle with sides a and b and hypotenuse c, for the base c. If a...

11 Monate vor

Gelöst

S-T-R-E-T-C-H I-T O-U-T
You will be given a row of numbers (x), and a single number (n). Your job is to write a script that will stretch out the row of...

11 Monate vor

Discussion

Are there any code restrictions for Cody solutions?
Are there any code restrictions for programming Cody solutions? I could not find anything mentioned at https://www.mathworks.com...

11 Monate vor | 0

Gelöst

Spherical radius given four points
Determine the radius of a sphere provided four non-coplanar points on the surface of the sphere. pts = [x1 y1 z1; x...

11 Monate vor

Gelöst

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]

11 Monate vor

Gelöst

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

11 Monate vor

Beantwortet
How does the svd function determine or fix the phase of singular vectors?
For a discussion of how MATLAB computes the SVD, see Cleve Moler's blog post, "Two Flavors of SVD," 23-Feb-2025. The svd doc pa...

11 Monate vor | 1

Beantwortet
Problem with image registration on images with simple patterns
As of R2024b, the function imregcorr uses a new algorithm called normalized gradient correlation. See my 16-Oct-2025 blog post f...

11 Monate vor | 0

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