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# Omar B.

Last seen: Today Active since 2019

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What is the difference between adjust the brightness of image by order of gamma and by alpha? Also, what is the difference betw...

1 month ago | 1 answer | 0

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Question

how to evaluate equation at different values?
I'd like to find and save x at different values of mu. Itried to write mu=linspace (2.4,4,1000) but I did not know how to compl...

3 months ago | 1 answer | 0

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Question

How to plot 2D Linear Inequality?
How to plot cond1 and cond2 with the cost in one figure? [x1,x2]=meshgrid(0:.1:10,0:.1:10); cond1=x1-x2<=-2; cond2=-0.3*x...

3 months ago | 1 answer | 0

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Question

how to write a Matlab code to sum 10 terms of rational numbers?
How to write a matlab code to find the sum of 10 terms of the follwing series: (39/2)-(36/5)+(31/10)-(24/17)+...

5 months ago | 2 answers | 0

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Question

How to collect the output in a matrix?
How can we create the block-tidaigonal matrix T using the output Omegas and Gammas as the picture I attached? n=100; k=2; ...

5 months ago | 1 answer | 0

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Question

How to code block lanczos algorithm?
Thanks ....

5 months ago | 1 answer | 0

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Question

How to solve two equations for four unknowns?
How to solve the follwoing system for x and y in Matlab? syms x y b r E1=x - y == x/(1+log(b*y+1)); E2=exp(r*(1-x))== 1+log(...

6 months ago | 1 answer | 0

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Question

Is there a way to find number of blocks in a matrix?
I have a matrix that has 5 blocks along the diagonal and two consecutive blocks overlap in one diagonal element. How can I comp...

6 months ago | 1 answer | 0

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Question

How can I simplify a symbolic expression?
I have computed orthonormal polynomials using Gram-Schmidt process. I got the following last polynomial, How do I simplify it...

8 months ago | 1 answer | 0

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Question

How to generate a normal matrix?
How to generate the following matrix in MATLAB? where is real number, and is odd number.

9 months ago | 2 answers | 0

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Question

How to generate a nearly symmetric matrix?
How to generate in Matlab a nearly symmetric Toeplitz matrix ?I just know how to construct symmetric or nonsymmetric, but I do ...

10 months ago | 1 answer | 0

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Question

How do we know the relation between times and the number of arithmetic floating point ?
I am trying to find out if solution of linear systems of equations with a triangular matrix by the backslash operation in Matlab...

10 months ago | 1 answer | 0

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Question

why does my code take so long to run?
I am trying to compute v' * f(A) * v, where f is a given function, A matrix, and v is a unite vector. My code takes along time ...

1 year ago | 1 answer | 0

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Question

How can we compute the derivative of polynomials?
How can we compute the derivative of the (m-1) polynomials at a point? I got the following error: The following error occurred...

1 year ago | 1 answer | 0

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Question

How to created a specific symmetric Toeplitz matrix?
Hi , Could you please help to simplify the following code. I created a symmetric Toeplitz matrix where its eigenvalues [ 0.28878...

1 year ago | 0 answers | 0

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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 ...

1 year 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...

1 year ago | 1 answer | 0

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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...

1 year ago | 2 answers | 0

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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...

2 years ago | 0 answers | 0

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Question

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

2 years ago | 1 answer | 0

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

2 years ago | 0

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 ...

2 years ago | 4 answers | 0

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Question

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

2 years ago | 1 answer | 0

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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...

2 years ago | 2 answers | 0

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Question

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

2 years ago | 1 answer | 0

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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...

2 years ago | 1 answer | 0

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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...

2 years ago | 1 answer | 0

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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}

2 years ago | 1 answer | 0

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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...

2 years ago | 2 answers | 0