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# Omar B.

##### Last seen: Today
17 total contributions since 2019

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Question

How can I measure time on MATLAB?
Hi, I am trying to measure the running time of solving system of linear equations using tic , toc. I have to compute the system ...

16 dagar ago | 1 answer | 0

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Question

How to compute arccos for a matrix?
I would like to compute the arccos for a matrix. I know when I want to find log(), exp(), and sqrt () for a matrix , we use logm...

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Question

How to calculate expm of a matrix?
Hi all, I am trying to run the following but I got an erorr Error in expm if ~all(isfinite(A),'all') How can I fix that err...

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Question

How to delete the last rows and columns?
How to delete the last three rows and three columns from the following matrix without change N and then multiply the last off di...

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Question

How to create a Toeplitz matrix?
How to create a symmetric positive definite Toeplitz matrix with entries ?

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What type of function Matlab has help to construct symmetric matrix?
Thank you so much . I really appreciate your help.

Question

What type of function Matlab has help to construct symmetric matrix?
What type of built-in functions (such as function Toeplitz) that come with Matlab help us to construct a symmetric matrix (not ...

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Question

Evaluating Function at Matrix ?
How can we evaluate the following function at matrix A?

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Question

how to create a symmetric Toeplitz matrix with bounds on eigenvalues?
Is there a way to creat a symmetic Toeplitz matrix of size 400 X 400 with real entries and its largest eigenvalue is 5 and the s...

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Question

How to generate a symmetric Toeplitz matrix?
How to generate a symmetric Toeplitz matrix ?

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Question

How to construct matrix for values have index?
I'm trying to construct a matrix H as the following pic. How can we write alpha _(-k,k) to get for example alpha _(0,0) or alpha...

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Question

How to fix the error (Index exceeds matrix dimensions)?
could you please check my code. I got the following error Index exceeds matrix dimensionshow . Error in NnNonSymmetricLancz...

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Question

How can we create a vector of length n
Hello, How can we write in Matlab vector u= [1/10 ,1/10 ,..., 1/10] where u \in{R}^{200}

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Question

how to open .mat file in matlab?
Hello, I am tring to open Yeast.mat in matlab , but it does not work. I got an error (Not enough input arguments.Error in imp...

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Question

How can we create two vectors have normally distributed random entries with zero mean?
How can we create two vectors have normally distributed random entries with zero mean , and they are scaled so that in Matla...

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Question

how can we collect the result in one matrix ?
Hello, How can we collcet the (j+1) vectors I found in one matrix? for j=1:m . . v(:,j+1)= A/B end

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Question

how to compute orthonormal vectors via Lanczos process?
Hello, How to initialize vector in Matlab? could you please check what I did ( I want to start with V_0=0 , beta (0)=0 , V(:,1...