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统计学

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factorization of a matrix
I want to write a symmetric matrix in this way: A = tensorproduct (K,I) + tensorproduct(I,K). I know matrix A and matrix I. Is t...

11 years 前 | 0 个回答 | 0

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Can I find nonnegative eigenvalues using eigs
In a very large sparse matrix I want to use eigs function to find all non-negative eigenvalues and corresponding eigenvectors, i...

11 years 前 | 1 个回答 | 0

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how can I create a name like myfunc500?!
I have a lot of matrices with these names: A200 A300 A400 ... and I want to do some algebra on each of them. I am...

11 years 前 | 2 个回答 | 0

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using normrnd function in a loop
If I use normrnd function in a loop, every times that normrnd runs in a new loop it will give me the same number? ( if I set par...

11 years 前 | 2 个回答 | 0

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how much memory need to find eigenvalues and eigenvectors of a matrix
I have a code in MATLAB and I want to run it for a very big sample size. But I do not know how much time it taks. The main point...

11 years 前 | 0 个回答 | 0

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finding some eigenvalues using eigs
I want to find eigenvalues of a matrix with size a few thoushands and I know the eigenvalues span through [- big number , + big ...

11 years 前 | 1 个回答 | 1

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how can I avoid this error: Error using eig EIG did not converge.
I want to find eigenvalu and eigenvector using "eig" function in matlab, but sometimes I get this error: Error using eig EIG...

11 years 前 | 2 个回答 | 0

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Obtaining standard deviation in cftool
I have [x,y] as my data and I want to fit a linear line to it. My question is can I obtain standard deviation for the linear lin...

11 years 前 | 1 个回答 | 0

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diagonalizing a matrix in two way
I diagonalize a matrix by using eig and then I change the matrix to symbolic for by A=sym(A) and them diagonalize it again, the ...

12 years 前 | 1 个回答 | 0

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check a variable is a symbolic or a double
is there a function to check a variable is a symbolic or a double?

12 years 前 | 2 个回答 | 0

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diagonalizing a matrix and putting eigenvectors in orde
I want to diagonal a matrix and ask MATLAB to put the smallest eigenvalue first and the corresponding eigenvector in first colum...

12 years 前 | 0 个回答 | 0

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Diagonalizing a matrix for special matrix
In MATLAB can I find a specific package to diagonal my matrix, I have somehow an specific matrix in which all elements of diagon...

12 years 前 | 0 个回答 | 0

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can I increase the accuracy of my numbers by digits
I am working with very small numbers. can I use digits to increase the accuracy? for example can I put digits=300 to get better ...

12 years 前 | 1 个回答 | 0

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how can I increase accuracy
I am working with a program that deals with very small numbers and I build a matrix that has this very small numbers, is there a...

12 years 前 | 4 个回答 | 0

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