Answered
how to find out the common neighbors of two nodes in a graph?
You can use the graph class for something like this. First, make a graph from the connection inputs you had: >> A=[1 2; 1 3; 1 ...

5 maanden ago | 2

| accepted

Answered
Error using tabular/permute and Error in median (line 186)
Applying median to a table directly is not supported. Either apply median to a specific variable of the table >> t = table([3;...

5 maanden ago | 0

Answered
Finding bridge of not isolated vertices
There is no functionality for MATLAB's graph class that would compute the bridges / cut edges. If performance is not a main con...

6 maanden ago | 1

Answered
How do I stop incidence function rearranging the edges of a graph?
The reordering isn't happening when the incidence of the graph is computed, but instead at the moment that the graph is construc...

6 maanden ago | 0

| accepted

Answered
Generalized Eigenvalue Problem - Hessenberg Matrix
I agree with Steve Lord; if you're able to replicate the action of matrix A on a vector v, you can pass this to EIGS in a functi...

6 maanden ago | 0

| accepted

Answered
Generating all non-isomorphic graphs for a given number of nodes with specified degrees
I've attached a script that computes the graphs in your example, here's the plot of all graphs it found:

6 maanden ago | 1

Answered
how to find kshortest path or use Dijkstra algorithm for 12 plot points.
I'm not sure how the data you're adding here maps to the picture you attached. Here's how I would go about inserting the positio...

6 maanden ago | 0

Answered
generate multi Diagonal matrices
The SVD is usually computed for a matrix, but you're only passing in a scalar on each call. Is it possible you meant to pass in...

6 maanden ago | 0

Answered
S is diagonal matrix of singular values?
MATLAB (and Fortran) store matrices in a column-first ordering, while in your file, you want to save numbers in a row-first orde...

6 maanden ago | 0

| accepted

Answered
Performance of matlab direct linear solver with respect to sparsity
For sparse matrices, the performance of backslash depends a lot on the specific structure of that sparse matrices (where the non...

6 maanden ago | 0

| accepted

Answered
How can I return real-valued eigenvectors from diagonalization?
I don't think it's possible: Looking at the eigenvalues and eigenvectors of B, >> diag(D) ans = 0.0000 + 2.0000i 0.000...

7 maanden ago | 0

Answered
incorrect eigenvector using eig(A,B)
The residual MK*V-MM*V*w2 is expected to be numerically close to zero, however, you have to take into account the scaling of the...

7 maanden ago | 0

Answered
highlight Nodecolor for a graph using a color map (JET)
Since colors is a n-by-3 array, use colors(i, :) to access the complete row that represents the color for node i. You can also u...

8 maanden ago | 0

| accepted

Answered
Path between 2 nodes in a graph
Compute a path between the nodes, then check if the result is empty (this is returned by shortestpath if no path exists): path ...

8 maanden ago | 2

Answered
Diagonalising a Skew-Symmetric Matrix
When EIG is called with an exactly symmetric/hermitian matrix, MATLAB falls back to a specialized algorithm that guarantees that...

8 maanden ago | 2

| accepted

Answered
Properties of SVD of a hermitian matrix not holding at single precision
I'd suggest just calling EIG [V, S] = eig(A) instead of calling the SVD. If A is (exactly!) symmetric on input, this will retu...

8 maanden ago | 0

| accepted

Answered
What is the difference between Gram-Smith QR decomposition procedure and qr.m function in Matlab?
MATLAB's QR decomposition is computed using Householder transformations, which is generally more numerically advantageous.

8 maanden ago | 0

| accepted

Answered
Plotting a graph in layered fashion
Unfortunately, there is currently no way to do this with the 'layered' layout. I'll make a note of your need for this. For now,...

8 maanden ago | 0

Answered
Shortest path through nodes
As Bjorn mentioned, this is the traveling salesman problem. The optimization toolbox has an example of how to use their intlinpr...

8 maanden ago | 1

| accepted

Answered
lsqminnorm- Tolerance to Reduce Impact of Noisy Data
The tolerance in lsqminnorm should be used if you expect your matrix A to be of low rank up to a tolerance. That is, for rank k,...

8 maanden ago | 0

Answered
How do I get Matlab to display a graph type data structure with decreasing weights
The Edges table attached to a digraph is always standardized so that its sorted by the EndNodes column. However, you can get a c...

8 maanden ago | 0

| accepted

Answered
Ordering edge names in Digraph
The edges are reordered in the graph constructor, but it looks like the Power variable you're assigning is in the same order as ...

8 maanden ago | 0

| accepted

Answered
SVD of each row of a matrix
The SVD of a row vector has the singular value equal to its norm, and the singular vectors 1 and the normalized vector. If this...

9 maanden ago | 0

| accepted

Answered
qr decomposition run-time performance
When a "~" is used for a return value, this is only for code clarity. MATLAB still needs to compute that value, so the second ca...

9 maanden ago | 2

Answered
Sign difference between coeff=pca(X) and [~,~,v] = svd(X)
I'm not sure why this happens. As mentioned by others, it doesn't matter what sign these outputs have. You could try stepping th...

9 maanden ago | 1

Answered
How to use non-unique node names in a digraph?
Instead of setting these inputs as node names, add them as a separate variable in the nodes table. Then, pass them to the plotti...

10 maanden ago | 0

| accepted

Answered
Is there any way to accelerate the solving of a series of large sparse positive definite linear equations "Ax=b" with same "A" and different "b"?
If you are able to solve for one vector using A \ b, you could pass in a matrix containing all your right-hand sides in instead:...

10 maanden ago | 2

Answered
Accelerate eigs with GPU
The eigs function is not supported on the GPU. There is support for sparse matrices on the GPU, since R2015a: Release notes para...

10 maanden ago | 1

Answered
Properties of adjacency matrix
In terms of the adjacency matrix, a disconnected graph means that you can permute the rows and columns of this matrix in a way w...

10 maanden ago | 0

Answered
Assigning values to an array of arbitrary dimensions in MATLAB.
Using the somewhat recent implicit expansion, this can also be done without indexing into every element of the array: function ...

10 maanden ago | 0

Load more