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Fabio Freschi


Politecnico di Torino

27 total contributions since 2014

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Answered
Identify nodes which lie within a range of 3D volumes
Try this % preallocation idx = cell(size(Vertices,3),1); % for each box for i = 1:size(Vertices,3) % find box min and...

11 giorni ago | 0

Answered
Find center of a plane and project center point perpendicular to plane
As already pointed out by Walter Roberson, 4 points cannot be coplanar. Assuming that they are, you may try this clear variable...

18 giorni ago | 2

| accepted

Answered
How to plot 3D matrix in form of cube
try figure; surf(D);

2 mesi ago | 0

Answered
How to fix an error about struct input of an function in Matlab?
It looks like you are passing the wrong data to the function. The first input must be a structure generated by the function SVMT...

2 mesi ago | 0

Answered
How to compare two matrices of different dimentions and get the result in new column
Try this % find logical indices in A with 2000 idxLog = A == 2000; % create the new vector with B values in idxLog and zero...

2 mesi ago | 0

Question


Quadprog 'interior-point-convex' failure
Dear Matlab Gurus, I have a problem with Matlab quadprog function. A few years ago I implemented a code using quadprog with th...

2 mesi ago | 3 answers | 1

3

answers

Question


symbolic derivative with constant output
Hi everyone, I am working on a code requiring the definition of an anonymous function that is the derivative of another anonymo...

6 mesi ago | 1 answer | 0

1

answer

Question


Create symbolic matrix from triplets with repeated indices
Hi everyone, I am trying to build a symbolic matrix from the triplets iRow, jCol, aElm such that A(iRow(k),jCol(k)) = A(...

circa 2 anni ago | 2 answers | 0

2

answers

Answered
Combine several code to a single code
Try |arrayfun| % the data X0=[5; -3; 3] y=[45;45;45] p=[30;30;30] r=[50;50;50] % the operation X1 =...

oltre 2 anni ago | 0

Question


Rotation that maximises a vector length
Hi all, I have a problem that is more related to linear algebra than Matlab itself, even if I would like to solve it with Mat...

oltre 2 anni ago | 0 answers | 0

0

answers

Answered
Rebuild a matrix from indices
Try linear indexing % the data A = [0 2 2 0 0 ; 2 0 0 2 2 ; 0 2 0 2 2 ; 0 0 0 2 2 ; 2 2 0 2 2]; [i,j] = find(A==2); ...

oltre 2 anni ago | 0

| accepted

Answered
How can i repeatedly store a smaller matrices after manipulations in a specific place of a larger matrix.
I think your first matrix should be 360x720 (and indexing starts with 1). Try this % create the matrices A = rand(360,72...

circa 3 anni ago | 0

Solved


Pizza!
Given a circular pizza with radius _z_ and thickness _a_, return the pizza's volume. [ _z_ is first input argument.] Non-scor...

circa 3 anni ago

Question


implementation of subclass from triangulation
Hi everyone, I am trying to implement a derived class from the 'triangulation' class available in Matlab 2014. The aim is to ...

oltre 3 anni ago | 3 answers | 0

3

answers

Submitted


int_green3d
Analytical integration of the Green's function in 3d over plane surfaces

oltre 3 anni ago | 5 downloads |

Question


GPU computing on iMac
Hi everyone, I would like to buy an iMac mounting an NVIDIA GeForce GT 755M board, but I am not sure if this hardware meets t...

circa 4 anni ago | 1 answer | 0

1

answer

Answered
How can I successfully solve a certain huge sparse matrix; i.e., 8e6 x 8e6 entries?
Sorry for late reply, I am on holiday! The method is described here O. Axelsson, A. Kucherov, "Real valued iterative metho...

circa 4 anni ago | 0

| accepted

Answered
How can I successfully solve a certain huge sparse matrix; i.e., 8e6 x 8e6 entries?
Chris, is the matrix complex symmetric (not-hermitian)? If so I think I have a possible solution to try. Fabio

circa 4 anni ago | 0

Answered
automatically cycle through function inputs
use varargin: function name(varargin) for i = 1:nargin figure(i), plot(varargin{1}); end end

circa 4 anni ago | 0

Answered
Eliminating unnecessary portions of arrays from structure.
If I understand correctly you want something like this idx = find(data(1).IAS >= 290 & data(1).IAS <= 310); plot(data(1).A...

circa 4 anni ago | 0

| accepted

Answered
Interpolating points of a 3D point cloud
Does triscatteredinterp make the job?

circa 4 anni ago | 0

Answered
how to use copy options in matlab for mac?
can you use: Edit -> Copy Figure ?

circa 5 anni ago | 0

Answered
find missing elements in a matrix
Try this A=[1 2 3 6 7 45 46 47 53 78 80]; all = 1:80; missing = setdiff(all,A); Fabio

circa 5 anni ago | 0

Answered
MATLAB in unexpected places
<http://www.phdcomics.com/comics/archive.php?comicid=1289> second scene

circa 5 anni ago | 1

Question


Iterative solver with gpuArray
Hi all, In some cases the use of iterative solvers is useful also with full matrices, which is my case. I would like to use a...

circa 5 anni ago | 2 answers | 1

2

answers

Answered
Color a delaunay triangulation
Let's suppose that your triangulation is organized as follows * P: Nx2: node coordinates * T: Mx3: triangulation * F: Mx1: ...

circa 5 anni ago | 0

| accepted

Question


Sparse complex symmetric direct solver for windows
Hi everyone, I am looking for a dedicated direct solver for large sparse complex symmetric (not hermitian) systems. The problem...

circa 5 anni ago | 0 answers | 0

0

answers