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Omar B.


Last seen: 1 jour il y a Actif depuis 2019

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Question


How to plot the error of two numerical methods on the same graph?
I'm trying to plot the error of two methods, but I got the following error Index exceeds the number of array elements (3) Also...

environ un mois il y a | 2 réponses | 0

2

réponses

Question


How to do a loop for different values?
I am trying to find basin of attraction of the roots, and I want to run the code for different values of q ( where q=0:0.2:...

5 mois il y a | 1 réponse | 0

1

réponse

Question


How to find Basins of attraction for the Halley method?
I am trying to implwment Halley's Mathod to find basin of attraction of the roots, but when I run the code I got a black image. ...

5 mois il y a | 1 réponse | 0

1

réponse

Question


How do I stop the code and get the results?
I am trying to run the Matlab code for Arnoldi method. The code dose not stop because the matrix is too large,. Is there a way t...

environ 2 ans il y a | 1 réponse | 0

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réponse

Question


How to check two conditions?
How can I check two conditions in if and elseif statment? When I run the following code, I got the last sentence " Your input is...

environ 2 ans il y a | 1 réponse | 0

1

réponse

Question


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

plus de 2 ans il y a | 1 réponse | 0

1

réponse

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...

plus de 2 ans il y a | 1 réponse | 0

1

réponse

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...

plus de 2 ans il y a | 1 réponse | 0

1

réponse

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)+...

plus de 2 ans il y a | 2 réponses | 0

2

réponses

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; ...

plus de 2 ans il y a | 1 réponse | 0

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Question


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

plus de 2 ans il y a | 1 réponse | 0

1

réponse

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(...

presque 3 ans il y a | 1 réponse | 0

1

réponse

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...

presque 3 ans il y a | 1 réponse | 0

1

réponse

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...

presque 3 ans il y a | 1 réponse | 0

1

réponse

Question


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

environ 3 ans il y a | 2 réponses | 0

2

réponses

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 ...

environ 3 ans il y a | 1 réponse | 0

1

réponse

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...

environ 3 ans il y a | 1 réponse | 0

1

réponse

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 ...

plus de 3 ans il y a | 1 réponse | 0

1

réponse

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...

plus de 3 ans il y a | 1 réponse | 0

1

réponse

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...

plus de 3 ans il y a | 1 réponse | 0

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réponse

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 ...

plus de 3 ans il y a | 1 réponse | 0

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réponse

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...

plus de 3 ans il y a | 1 réponse | 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...

presque 4 ans il y a | 2 réponses | 0

2

réponses

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...

environ 4 ans il y a | 1 réponse | 0

0

réponse

Question


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

environ 4 ans il y a | 1 réponse | 0

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

environ 4 ans il y a | 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 ...

environ 4 ans il y a | 4 réponses | 0

4

réponses

Question


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

environ 4 ans il y a | 1 réponse | 0

1

réponse

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...

environ 4 ans il y a | 2 réponses | 0

2

réponses

Question


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

environ 4 ans il y a | 1 réponse | 0

1

réponse

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