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Ming


Imperial College

Attivo dal 2013

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Statistica

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Domanda


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...

oltre 7 anni fa | 2 risposte | 0

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Domanda


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...

oltre 8 anni fa | 0 risposte | 0

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Domanda


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}...

oltre 8 anni fa | 2 risposte | 0

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Domanda


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 ...

oltre 8 anni fa | 0 risposte | 0

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Domanda


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...

quasi 9 anni fa | 1 risposta | 1

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Domanda


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...

oltre 9 anni fa | 2 risposte | 0

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

oltre 9 anni fa | 0

Domanda


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...

oltre 9 anni fa | 1 risposta | 0

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risposta

Domanda


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...

oltre 10 anni fa | 1 risposta | 0

1

risposta

Domanda


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...

circa 11 anni fa | 2 risposte | 0

2

risposte

Domanda


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...

circa 11 anni fa | 3 risposte | 0

3

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Domanda


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}...

oltre 11 anni fa | 1 risposta | 0

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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(:,...

oltre 11 anni fa | 0

Domanda


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, ...

oltre 11 anni fa | 3 risposte | 0

3

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Domanda


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...

oltre 11 anni fa | 2 risposte | 0

2

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Domanda


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...

oltre 11 anni fa | 0 risposte | 0

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

oltre 11 anni fa | 0

Domanda


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...

oltre 11 anni fa | 2 risposte | 0

2

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Domanda


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...

oltre 11 anni fa | 2 risposte | 0

2

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Domanda


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, ...

oltre 11 anni fa | 1 risposta | 0

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