Ming

Imperial College

Aktiv seit 2013

Followers: 0 Following: 0

Nachricht

Statistik

Abzeichen anzeigen

Feeds

Frage

The most efficient way to add a new column or new row to a sparse matrix
Hi, suppose I have a large scale sparse matrix A, i.e. size(A)=[100k,10k]. I am wondering, what is the most efficient way to app...

mehr als 8 Jahre vor | 2 Antworten | 0

2

Antworten

Frage

Which Techniques that ARIMA is using for estimating the AR and MA parameters?
Hi, Does anyone know that which techniques the ARIMA command is using for estimating the AR and MA parameters? Can anyone give m...

mehr als 9 Jahre vor | 0 Antworten | 0

0

Antworten

Frage

Combine cell array with contant matrices
Hi everyone, Suppose I have a cell array A{1} A{2} A{3} ... A{n}, can I create a new cell array A_{1} A_{2} A_{3} ... A_{n}...

mehr als 9 Jahre vor | 2 Antworten | 0

2

Antworten

Frage

Question about choosing an initial state error covariance for Kalman filter
Hi Everyone, I have a Kalman filter code from internet, which estimates states of following state space system: x(k+1)= A ...

mehr als 9 Jahre vor | 0 Antworten | 0

0

Antworten

Frage

Creat a positive definite matrix, which way is better?
Hi everyone, Suppose I have a positive definite matrix P and a non-singular matrix A, I realised there is a small numerical d...

fast 10 Jahre vor | 1 Antwort | 1

1

Antwort

Frage

How to create a square matrix with consecutive numbers on each row?
Hi everyone, Given a vector i.e. n=[1 12 25 78], is there any way to create a matrix A, such that A=[ 1 2 3 4; 11 1...

mehr als 10 Jahre vor | 2 Antworten | 0

2

Antworten

Beantwortet
Problem of saving .fig file as .pdf file
does anyone know?

fast 11 Jahre vor | 0

Frage

Problem of saving .fig file as .pdf file
Hi, everyone I need to save .fig file as .pdf file. Previously, I used command set(gcf,'PaperOrientation','landscape'); s...

fast 11 Jahre vor | 1 Antwort | 0

1

Antwort

Frage

MATLAB 2014a cannot enable parpool
Hi, I tried to enable parpool in MATLAB 2014a, it gives following message Error using parpool (line 99) The operation must mod...

mehr als 11 Jahre vor | 1 Antwort | 0

1

Antwort

Frage

How to construct this matrix without loop?
Hi, everyone: suppose I have a vector x=[a b c d e f g h ... z]. Is it possible to construct a matrix such that: X=[a b c...

etwa 12 Jahre vor | 2 Antworten | 0

2

Antworten

Frage

How to construct this vector without loop?
Hi, everyone: I was wondering, is it possible to construct following vector without for loop? A=[1 2 3 1 2 3 4 5 6 1 2 3 4...

etwa 12 Jahre vor | 3 Antworten | 0

3

Antworten

Frage

Construct product of matrices without for loop
Hi, everyone: Suppose A is a 2 by 2 by N matrix, is it possible to construct a matrix B, such that: B=[Prod(A)_1^{N-n}...

mehr als 12 Jahre vor | 1 Antwort | 0

1

Antwort

Beantwortet
Construct Power of Matrix without for loop
Thanks very much! Do you know if A is a 2 by 2 by N matrix, can I use "arrayfun" or any other way to do: B=[A(:,:,1), A(:,...

mehr als 12 Jahre vor | 0

Frage

Construct Power of Matrix without for loop
Hi, everyone: Suppose I have a 2 by 2 matrix A, if I want construct a larger matrix B that is defined as: B=[A, A^2, A^3, ...

mehr als 12 Jahre vor | 3 Antworten | 0

3

Antworten

Frage

Positive Semi-definite Matrix Problem
Suppose I have a large M by N dense matrix C, which is not full rank, when I do the calculation A=C'*C, matrix A should be a pos...

mehr als 12 Jahre vor | 2 Antworten | 0

2

Antworten

Frage

How to parallel run 2 different functions?
Hi, everyone: Suppose I have two functions called P2 and P3, each function will run N times using for-loop and P2(t=k) requir...

mehr als 12 Jahre vor | 0 Antworten | 0

0

Antworten

Beantwortet
How to transfer a sparse matrix into a block diagnal matrix efficiently?
Thank you very much Cedric, you are a genius and super kind!

mehr als 12 Jahre vor | 0

Frage

How to transfer a sparse matrix into a block diagnal matrix efficiently?
Hi, Everyone: Suppose I have a very large M*N sparse matrix A, where M=K*N, I need to equally split it into K N*N matrices an...

mehr als 12 Jahre vor | 2 Antworten | 0

2

Antworten

Frage

Large Sparse Matrix Summation
Hi, Everyone: Suppose I have a very large M*N sparse matrix A, where M=K*N, I need to equally split it into K N*N matrices a...

mehr als 12 Jahre vor | 2 Antworten | 0

2

Antworten

Frage

Construct a large sparse matrix
Hi, everyone I am currently constructing a very large sparse square matrix which is made by several smaller sparse matrices, ...

mehr als 12 Jahre vor | 1 Antwort | 0

1

Antwort