Statistica
34 Domande
0 Risposte
RANK
8.566
of 295.495
REPUTAZIONE
5
CONTRIBUTI
34 Domande
0 Risposte
ACCETTAZIONE DELLE RISPOSTE
64.71%
VOTI RICEVUTI
5
RANK
of 153.991
CONTRIBUTI
0 Problemi
0 Soluzioni
PUNTEGGIO
0
NUMERO DI BADGE
0
CONTRIBUTI
0 Post
CONTRIBUTI
0 Pubblico Canali
VALUTAZIONE MEDIA
CONTRIBUTI
0 Punti principali
NUMERO MEDIO DI LIKE
Publish your first review
Awarded to Xin on 09 Oct 2019
Accept 20 answers given by other contributors
Awarded to Xin on 29 Oct 2018
Feeds
Domanda
Constrained optimization, free code
Dear all. I have a constrained optimization problem where I used the fmincon function, and it works perfectly well. But it does ...
oltre 3 anni fa | 1 risposta | 0
1
rispostaDomanda
Get the middle point of a matrix
Hi everyone. I have an interesting situation. So the idea is to calculate the value of middle points of a 1D, 2D or 3D matrix. ...
oltre 4 anni fa | 1 risposta | 0
1
rispostaDomanda
save image without the white border
Hello. I would like to save a phot, or any imagesc, pcolor or whatever 2D image. But the problem is that matlab alway automatica...
oltre 4 anni fa | 2 risposte | 0
2
risposteDomanda
Uncertainty of constrained minimization
Hello everyone. I have a question about the uncertainty of linear minimization. Basically I want to solve for a constrained mini...
circa 6 anni fa | 0 risposte | 0
0
risposteDomanda
Visualization volume data like pcolor3
Basically I was looking for a pcolor3 like function that can run in newer version of matlab. The idea of using slice to have mul...
oltre 6 anni fa | 1 risposta | 0
1
rispostaDomanda
Compute three solution for cube root including imaginary number
Hello everyone. I have a vector composed of some positive and negative numbers. Is there is simple way to quickly get the three ...
oltre 6 anni fa | 0 risposte | 0
0
risposteDomanda
Search for components in symbolic
Hello. Let's say I have a symbolic function: exp(5*x)*x^3. Is it possible to let MATLAB automatically search for the component ...
oltre 6 anni fa | 1 risposta | 0
1
rispostaDomanda
2D convolution with 1D output
Hi everyone, basically I need to compute the following convolution problem in 2D, but with only 1 array output. Is it possible t...
oltre 6 anni fa | 1 risposta | 0
1
rispostaDomanda
Fast computation of 2D summation
Hello. I have two matrix, A and B and I want to compute the following 2D summation to get a 1D array T. Is it possible to use, e...
oltre 6 anni fa | 1 risposta | 0
1
rispostaDomanda
Column vector multiplied to a row vector, memory v.s. speed issue
Hello everyone. I have a column vector (A) that is left multiplied to a row vector (B). The result is a matrix C=A*B. What I nee...
oltre 6 anni fa | 1 risposta | 0
1
rispostaDomanda
Set up tolerance and maximal iteration number for lsqlin
Hello, I have a system of linear equations L*X=R and I try to use lsqlin to get the solution with least square. The system of eq...
oltre 6 anni fa | 1 risposta | 0
1
rispostaDomanda
Solve linear system of equations with constains
Hello everyone. I have a linear system of equations that make a matrix, L*x=R. x is composed on many variables, e.g. x=[x1 x2 x3...
oltre 6 anni fa | 1 risposta | 1
1
rispostaDomanda
Derivative of legendreP function
Hello. I am wondering how could one differentiate the legendre polynomial, e.g. like legendreP(5,x) can be expressed as (63*x^5)...
quasi 7 anni fa | 1 risposta | 0
1
rispostaDomanda
Elegantly refer to the second output from a function
Hello everyone. I have a function (matlab function, say "ismember") and I want to use the second output from this function as in...
quasi 7 anni fa | 8 risposte | 2
8
risposteDomanda
Find if a point is inside tetrahedron
Hello everyone. I have a point in 3D space and a FE mesh containing many tetrahedron elements with four corner nodes and the 3D ...
quasi 7 anni fa | 1 risposta | 0
1
rispostaDomanda
Delaunay meshing problem with stretched mesh
Hello, everyone. I have a meshing problem using Delaunay function. I have evenly scattered points (stored in x y and z vector) d...
quasi 7 anni fa | 0 risposte | 0
0
risposteDomanda
Compute mean and diff faster
Hello everyone. I am working on a FD code and need to do a lot of averaging in very large 3D/2D matrices. I want to do the follo...
quasi 7 anni fa | 3 risposte | 0
3
risposteDomanda
Convert color to value
Hello everyone. I have a jpg image with blue to red color corresponding to different value. There is also a colorbar showing eac...
quasi 7 anni fa | 3 risposte | 0
3
risposteDomanda
Colorbar design from log negative to positive
I have a 2D matrix and the value vary exponentially between negative to positive. I want to design a colorbar that looks like be...
circa 7 anni fa | 0 risposte | 0
0
risposteDomanda
GUI report error if something is wrong
I have a GUI that has a static text box which I use to update for the status of the code. The GUI needs to load data from an exc...
circa 7 anni fa | 1 risposta | 0
1
rispostaDomanda
save figure in GUI
I have a GUI with two axes and many other buttons. I would like to save one axis into 'jpg' or 'tif' file. However when I tried ...
circa 7 anni fa | 1 risposta | 0
1
rispostaDomanda
Add element to the matrix in one sentence
I have a 2D matrix, say A=zeros(10,10). I want to add a vector of number to the matrix. I have the index of the elements, but it...
oltre 7 anni fa | 2 risposte | 0
2
risposteDomanda
Indexing 3D matrix with three 1D vector
I have a 3D matrix, say A=100*100*100. I want to index 5 elements from it. What I have are three 1D vector (lenght=10), say x=[1...
oltre 7 anni fa | 1 risposta | 0
1
rispostaDomanda
Solve large linear system of equations with klu function
I have a huge sparse function L (10 million*10 million). It is not symmetric. Most off-diagonals are zeros. I want to solve for ...
oltre 7 anni fa | 0 risposte | 0
0
risposteDomanda
Overlap two pcolor with different color and set up transparency
I have two figures like below. <</matlabcentral/answers/uploaded_files/70571/a.jpg>> <</matlabcentral/answers/uploaded_fil...
quasi 8 anni fa | 1 risposta | 2
1
rispostaDomanda
sample from arbitrary continuous distribution
Say I have a very complicated probability distribution function: x^(-2)*y^(-3)*exp(-z/t), where x y z t are all continuous posit...
quasi 8 anni fa | 1 risposta | 0
1
rispostaDomanda
Solve equation with order higher than 32
I have a very high order equation, something like 0=x^50 + a*x^49 + b*x^48 +...+ 1 I tried to use fzero or program Newton Raphs...
quasi 8 anni fa | 1 risposta | 0
1
rispostaDomanda
Colormap, how to get the color of the sea
This is an interesting question to me. I wanted to create a nice colormap with very smooth and gradual transition from white to ...
quasi 8 anni fa | 1 risposta | 0
1
rispostaDomanda
Generalized nonlinear inverse problem
Anybody knows if there exist a function that applies the so-called Generalized Nonlinear Inverse Theory (Tarantola and Vallette ...
circa 8 anni fa | 0 risposte | 0
0
risposteDomanda
non linear Least square fitting
I have an equation: z = A*(y^B)*exp(C*x) where x,y,z are my data points, and A B C are the unknowns that I want to fit. ...
circa 8 anni fa | 1 risposta | 0
1
risposta
Puoi anche selezionare un sito web dal seguente elenco:
Americhe
- América Latina (Español)
- Canada (English)
- United States (English)
Europa
- Belgium (English)
- Denmark (English)
- Deutschland (Deutsch)
- España (Español)
- Finland (English)
- France (Français)
- Ireland (English)
- Italia (Italiano)
- Luxembourg (English)
- Netherlands (English)
- Norway (English)
- Österreich (Deutsch)
- Portugal (English)
- Sweden (English)
- Switzerland
- United Kingdom(English)
Asia-Pacifico
- Australia (English)
- India (English)
- New Zealand (English)
- 中国
- 日本Japanese (日本語)
- 한국Korean (한국어)