## 1. Extract only diagonal elements from matrix - MATLAB Answers

Jan 26, 2021 · I can extract all of the permutations (X1, Y1; X1 Y2 ...X2,Y1 ... etc) and then take the diagonal, but I was wondering if there was a simple ...

I have a matrix in one variable and a list of coordinates in another variable. Is there a way to extract only the matching pairs of coordinate from the matrix? I.e. X(1),Y(1); X(2), Y(2)... I ca...

## 2. MATLAB diag - MathWorks

This MATLAB function returns a square diagonal matrix with vector v as the main diagonal ... diag. Create diagonal matrix or get diagonals from symbolic matrices.

This MATLAB function returns a square diagonal matrix with vector v as the main diagonal.

## 3. diagonals of an uncertain matrix - MATLAB diag - MathWorks

This MATLAB function creates an uncertain matrix MV whose diagonal elements are the elements of the uncertain vector V and whose off-diagonal elements are ...

This MATLAB function creates an uncertain matrix MV whose diagonal elements are the elements of the uncertain vector V and whose off-diagonal elements are 0.

## 4. How to extract the diagonal of a given matrix? - MATLAB Answers

Sep 7, 2017 · How can I extract the diagonal of a given matrix with using size? I know we can do it directly with diag.

How can I extract the diagonal of a given matrix with using size? I know we can do it directly with diag.

## 5. How can I refer to the diagonals of a matrix? - MATLAB Answers

Feb 18, 2014 · The diagonals seem to follow two patterns. The first pattern happens for the 1st through Nth diagonals, where N is the size of the matrix (N=5 ...

I'm trying to write a code to refer to the diagonals of a matrix, but I'm having some difficulty doing so. For example, if you have a 5x5 matrix, the diagonals will be made up of the following elem...

## 6. Extract main diagonal of input matrix - Simulink - MathWorks

The Extract Diagonal block populates the unoriented output vector with the elements on the main diagonal of the M-by-N input matrix A.

## 7. How to extract diagonal elements of multidimensional array ? - MATLAB ...

Mar 23, 2023 · I was hoping to have a tensor_diag function that takes a tensor A as an input parameter and returns a vector consisting of its diagonal ...

If I have a m-order n-dimensional tensor. How should I extract the diagonal elements ? For example % Generate a 3-order 4-dimensional tensor rng('default') A = rand(4,4,4) The diagonal elem...

## 8. How to get diagonal elements of non-square matrix? - MathWorks

Mar 26, 2017 · I am working with rectangular matrixes and I want to extract the values that go from the upper left corner to lower right (diagonal).

Hi, guys! I am working with rectangular matrixes and I want to extract the values that go from the upper left corner to lower right (diagonal). I have tried to write some codes, but they don't g...

## 9. Determine if matrix is diagonal - MATLAB isdiag - MathWorks

Examples · More About

This MATLAB function returns logical 1 (true) if A is a diagonal matrix.

## 10. Diagonal of a non-squared martrix - MATLAB Answers - MathWorks

May 4, 2018 · MATLAB has a built-in function for the identity matrix, 'eye'. There are two diagonals in a non-square matrix. We'll set both, one at a time. If ...

Hello all, I have a matrix A=zeros(179,716) and I am trying to put the value "1" in its diagonal however it's not a squared matrix so I don;t know how to this! any ideas? thanks a ...

## 11. Is there an easier way to index diagonal elements of a matrix?

Jul 27, 2022 · A = diag(randi(100,10,1));. I want to replace some of the diagonals with different values. In particular, I want to replace the 3rd, 6th, 7th, ...

Let's say I have a 10 x 10 diagonal matrix of random integers between 0 and 100: A = diag(randi(100,10,1)); I want to replace some of the diagonals with different values. In particular, I want to...

## 12. How do you make the diagonal and certain off-diagonal elements of a ...

Feb 14, 2023 · S = spdiags(Bin,d,A) replaces the diagonals in A specified by d with the columns of Bin. ·... after which you would full() · This could be used ...

I have a square matrix and would like to make the diagonal elements zero, as well as select elements that are off-diagonal. For the latter, I only want the elements next to (one removed from) the d...

## 13. How do you extract diagonal elements of a cell array? - MATLAB Answers

Jan 14, 2022 · Alternatively you could try creating an index matrix with the "eye" command and then use that to select your values from the matrix.

[9;9;9;9;1;1;2;2] [9;2;1;1;2;1;9;9] [9;2;1;1;2;1;9;9] [9;9;9;9;1;1;2;2] [9;2;1;1;2;1;9;9] [9;2;1;1;2;1;9;9] 0 [2;1;9;2;9;9;9;9] [2;1;9;2;9;9;9;9] Hi, need help: i hav...

## 14. How to extract a number of diagonals of a matrix - MATLAB Answers

Jun 6, 2014 · Direct link to this answer · - Here is a version using sparse matrices and SPDIAGS · Original, dense matrix: · Define diag ID "amplitude":.

Hello all, I have an N-by-N matrix. I want to extract the main diagonal and d diagonals to its right and d diagonals to its left and null all other elements. How can I do that? Thanks

## 15. How can I get the secondary diagonal of a matrix? - MATLAB Answers

Oct 27, 2020 · How can I get the secondary diagonal of a matrix?. Learn more about matrix MATLAB.

for exaple: A=rand(5,5) diag(A)= main diagonal of matrix A I want to take the elements A(1,5), A(2,4), A(3,3), A(4,2), A(5,1), (secondary diagonal), and put those ones into a vector without pick...

## 16. Sum of diagonal elements - MATLAB trace - MathWorks

Create a 3-by-3 matrix and calculate the sum of the diagonal elements. ... The result tr ( A ) = 14 agrees with a manual calculation. A = [ a 11 a 12 a 13 a 21 a ...

This MATLAB function calculates the sum of the diagonal elements of matrix A:...

## 17. Calculating diagonal elements of a matrix product without a loop or ...

Mar 10, 2012 · A = diag(F*B*F');. The problem here is that it is calculating all the elements of F*B*F', and then only selecting ...

I have a problem wich invovles calculating the product of the ith row of a matrix, say F, and another matrix, say B, and then multiplying again by the ith row of F as a column (for each row of F). ...

## 18. MATLAB spdiags - MathWorks China

This MATLAB function extracts the nonzero diagonals from m-by-n matrix A and ... Extract nonzero diagonals and create sparse band and diagonal matrices.

This MATLAB function extracts the nonzero diagonals from m-by-n matrix A and returns them as the columns in min(m,n)-by-p matrix Bout, where p is the number of nonzero diagonals.

## 19. Creating a vector from the diagonal values of a square matrix - MathWorks

Jul 29, 2014 · vector=diag(matrix);. check help diag for more detailed information.

Hello, Does anybody know how I can read the diagonal values of a square matrix and create a vector (1:n) from those values? Cheers, Cyrus

## 20. spdiags (MATLAB Functions)

A = spdiags(B,d,m,n) creates an m -by- n sparse matrix by taking the columns of B and placing them along the diagonals specified by d . Note If a column of B is ...

Extract and create sparse band and diagonal matrices

## 21. How to get Ones along the diagonal - MATLAB Answers - MathWorks

Dec 29, 2016 · I need a matrix of size 5x5 with ones along the diagonal and remaining values to be zero. How to get this.

I need a matrix of size 5x5 with ones along the diagonal and remaining values to be zero. How to get this.

## 22. spdiags (MATLAB Functions)

B = spdiags(A) extracts all nonzero diagonals from the m -by- n matrix A . B is a min(m,n) -by- p matrix whose columns are the p nonzero diagonals of ...

Extract and create sparse band and diagonal matrices