Risposto
How to customize the markers of the scatter figure, as shown below
Here's one way. Not sure you'll like the gymnastics that it requires: [x,y]=deal(rand(1,40), rand(1,40)); %scattered input dat...

circa 2 mesi fa | 2

| accettato

Risposto
Linear indices from colon operator
[I,J]=ndgrid(p1:p2,p3:p4); linear=sub2ind(size(array) , I,J);

circa 2 mesi fa | 1

| accettato

Risposto
Geometry properties in 3D (area, volume, moment of inertia...)
You can project your planar points into a 2D coordinate system and then use whatever 2D methods you had used previously to compu...

circa 2 mesi fa | 0

Risposto
Finding contiguous regions of interest in a mask and calculating the mean values of those regions when the mask is applied to an array
myImage=myImage'; L=L'; Lmax=max(L(:)); result=cell(1,Lmax); for i=1:Lmax result{i}=rasterMean(myImage(L==i...

circa 2 mesi fa | 0

| accettato

Risposto
Handling missing observations while using fmincon
They should be zeros rather than NaNs, shouldn't they? With zeros, they will make no contribution to the linear part of the pred...

circa 2 mesi fa | 0

Risposto
Filtering nose and removing spikes at local areas
Consider isoutlier.

circa 2 mesi fa | 0

Risposto
Develop a generalize MATLAB code to * perform the following transformations on a pentagon defined by the points A, B, C, D, and E, where the coordinates are based on the last
Consider polyshape

circa 2 mesi fa | 0

Risposto
I want the input of the neural network to be of data type 'SCB'
You haven't listed your Matlab version, but in newer versions, you are encouraged to be training with trainnet instead of trainN...

circa 2 mesi fa | 0

Risposto
randomAffine3d is not properly random
EDITED: If you don't like what the default randomizer is doing, randomAffine3d() also let's you define your own, e.g., ori = [e...

circa 2 mesi fa | 0

Risposto
randomAffine3d is not properly random
If you want an isotropic distribution across the entire sphere, this should do it. ori = [eye(3);-eye(3)]; N=1000; o=cell(N...

circa 2 mesi fa | 0

Risposto
slow imwarp with large arrays
20k x 20k is an incredibly high resolution. Do you really need it, and if so, do you really need to use cubic interpolation, as ...

circa 2 mesi fa | 0

Risolto

Sum along each diagonal of a matrix
Write a routine that returns the sums along the diagonals of a given matrix, A, where the first diagonal is the bottom left corn...

circa 2 mesi fa

Risposto
Warning: Equation is badly conditioned. Remove repeated data points or try centering and scaling.
9th order polynomials do tend to be badly conditioned. Try using a lower order, or perhaps a spline model.

circa 2 mesi fa | 0

Risposto
help counting number of times a value occurs across matrix
values = [111, 112, 121, 122, 211, 212, 221, 222, 311, 312, 321, 322, 411, 412, 421, 422]; edges=[values,inf]; dp = [111 112...

circa 2 mesi fa | 0

Problema

Sum along each diagonal of a matrix
Write a routine that returns the sums along the diagonals of a given matrix, A, where the first diagonal is the bottom left corn...

circa 2 mesi fa | 0 | 11 risolutori

Risposto
Unable to achieve desired speed up using parfor
I find that all instances on B finish in about half the time as those on A. It baffles me... That is the expected result, assu...

2 mesi fa | 0

Risolto

Sum All Positive Elements
Output a scalar that is equal to the sum of all positive elements in a given vector/matrix. For Example: The sum of all positi...

2 mesi fa

Risolto

Build a block Toeplitz matrix
A symmetric block Toeplitz matrix has the form, where the are compatibly-sized matrices. Write a routi...

2 mesi fa

Risposto
How to avoid unrecognized option names using optimget
Although I am using R2024a, that particular code still uses an older (2016-2019) version of lsqcurvefit. If so, problem solved....

2 mesi fa | 0

| accettato

Problema

Build a block Toeplitz matrix
A symmetric block Toeplitz matrix has the form, where the are compatibly-sized matrices. Write a routi...

2 mesi fa | 0 | 5 risolutori

Risposto
Finding the Center of Broken Vase Slices
You can use ellipticalFit() from this download, https://www.mathworks.com/matlabcentral/fileexchange/87584-object-oriented-tool...

2 mesi fa | 1

Problema

Condition number of Kronecker product
Given NxN matrix A and MxM matrix B, where M,N<=1000, write a routine to compute the condition number of kron(A,B).

2 mesi fa | 0 | 6 risolutori

Risolto

2x2 binning of a large sparse matrix
Consider the 20000 x 20000 sparse matrix, A=round(sprand(2e4,2e4,1/1e4*100)*1000); The task is to divide this matrix into 2x...

2 mesi fa

Risolto

Convert a vector into numbers
Suppose a vector x = [ 1 2 4 7] is given. You have to convert this vector into string number y = '1247'. Examples x = [ 1...

2 mesi fa

Risolto

Reverse within string
If input is a string 'yellow' the output should be 'leywol'. Locate the middle of the string and reverse the first (yel) and sec...

2 mesi fa

Risolto

Minimum Distance Point to Segment
This Challenge is to determine the minimum distance from a 2-D line segment defined by two points to a point. The point is (p...

2 mesi fa

Risolto

Property dispute!
Two neighbors have rectangular plots of land A and B. The surveyors give you the coordinates of each. If they overlap, there is ...

2 mesi fa

Risolto

Project Euler: Problem 10, Sum of Primes
The sum of the primes below 10 is 2 + 3 + 5 + 7 = 17. Find the sum of all the primes below the input, N. Thank you <http:/...

2 mesi fa

Risolto

Extract diagonal of sparse quadratic form
Consider the matrix A and vector v given by, A=round(sprand(5e3,1e4,1/1e4*100)*100); v=randi(10,width(A),1); Write a rout...

2 mesi fa

Problema

Extract diagonal of sparse quadratic form
Consider the matrix A and vector v given by, A=round(sprand(5e3,1e4,1/1e4*100)*100); v=randi(10,width(A),1); Write a rout...

2 mesi fa | 1 | 4 risolutori