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Can I get the integral formula using Matlab?
I have the following integration: $\int_{0}^{2\pi}\frac{1}{\pi}\sin(nx/2)(\pi-x)^2\sin(mx/2)dx$ and and are integers. Can...
4 years 前 | 0 个回答 | 0
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How can I find a specific toolbox
Hi, I read a paper about a toolbox for solving the first order ODE using exponential integartors that is called EXPODE. I d...
4 years 前 | 1 个回答 | 0
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How to make R close to the identity
Hi everyone.. Is there any idea how I can make the matrix in qr factorisation close to the identity? Here is my attempt f...
4 years 前 | 0 个回答 | 0
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write a vector with 3 values inside a loop
Hi everyone, I have a code and I'm looking to find in which real values of y-1=0. Here eigA find eigenvalues of $3x3$ matrix ...
4 years 前 | 0 个回答 | 0
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changing the ode inside ode45
Hi everyone, I'm trying to solve an ode using ode45 which comes basically from matrix second order ode. My idea is to solve fir...
4 years 前 | 0 个回答 | 0
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ode45 with matrix 1st order ode
Hi everyone, I'm trying to solve a first order ode in a matrix form using ode45: where and $Q=\begin{pmatrix} \sin(x) & 0 ...
4 years 前 | 1 个回答 | 0
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obtaining the shifts inside the sptarn code
Is there any way to know a value used inside a code? For example in the SPTARN code, which used to solve the generalized spa...
5 years 前 | 0 个回答 | 0
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Arnoldi method to find eigenvalues
I'm trying to implement the Arnoldi method with the inverse power method to find eigenvalues of large pencil matrix. I have fol...
5 years 前 | 1 个回答 | 0
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another syntax to obtain eigenvalues?
Is there any other syntax to find eigenvalues of pencil matrix differes from eig?
5 years 前 | 0 个回答 | 0
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solving eigenvalues PDE problem
I'm working on solving an eigenvalue problem on a domain . I'm intersted on the eigenvalues on the left hand side of the domain...
5 years 前 | 1 个回答 | 0
1
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questions about the 'pdeeig'
I'm using the syntax [?,?]=??????(?,?,?,?.1.0,?,1.0,[−1,1]); to solve a PDE on a given domain with a given ? , I have two quest...
5 years 前 | 1 个回答 | 0
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specify coefficients in pdeeig
I'm working on finding the eigenvalues of a PDE, I'm using: [v,l] = pdeeig(b,p,e,t,1.0,'c*exp(-x)',1.0,[-5 0.9]); the sixth entr...
5 years 前 | 0 个回答 | 0
