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Question
poisson need help with this
he Poisson Equation on the square domain 0<x<1, 0<y<1, with u=g(x,y) on the boundary, where Finish this code, with node ...
plus de 6 ans il y a | 1 réponse | 0
0
réponseQuestion
i need help with this question
I am supposed to find the number of timesteps i.e the number of steps taken but my answer is incorrect any inputs on my code wil...
plus de 6 ans il y a | 1 réponse | 0
0
réponseQuestion
plotting help needed (increasing resolution)
this is my code how would i increase the resolution of the graph? N = 101; tmin = 0; tmax = 3; t = linspace(tmin,tmax,N...
plus de 6 ans il y a | 1 réponse | 0
1
réponseQuestion
i need to get the maximum amplitude in this code but my final answer is wrong
The data file https://www.dropbox.com/s/8b8u38ghve7tfv0/Data.mat?dl=0 i get 28400 as the answer but the answer is wrong plus t...
plus de 6 ans il y a | 1 réponse | 1
1
réponseQuestion
index exceeded matrix dimensions please help
I get this error what should i do to correct this? Index exceeds matrix dimensions. Error in t31 (line 11) F1=Fmag((N/2)+1:N)...
plus de 6 ans il y a | 1 réponse | 0
0
réponseQuestion
need help with the question
This code is not working i am using this to calulate the amplitude but i am getting this error Index exceeds matrix dimensi...
plus de 6 ans il y a | 1 réponse | 0
1
réponseQuestion
need help with this
turn all the amplitudes of frequencies which are higher than 3500 Hz into 0’s and amplify the rest of the spectrum (by just mul...
plus de 6 ans il y a | 1 réponse | 0
1
réponseQuestion
Initial value problem need help with
How would i go about this ?
plus de 6 ans il y a | 1 réponse | 0
0
réponseQuestion
need help with problem
what is wrong in this code i dont get the correct answer xleft=0; xright=(9*pi)/4; N=20; x=linspace(xleft,xright,N); x=x...
plus de 6 ans il y a | 2 réponses | 0
2
réponsesQuestion
heun mthod 1st order ode
Is this code correct and how do i find which integer time t is the solution y(t) closest to -0.2 y0 = -1; % In...
plus de 6 ans il y a | 1 réponse | 0
1
réponseeuler method first order
thanks for your comments John the multiplication when it was supposed to be an addition was a mistake on my part.
plus de 6 ans il y a | 0
Question
euler method first order
This is my code is this correct? y0 = -1; % Initial Condition h = 0.1; t = 0:h:100; N=lengt...
plus de 6 ans il y a | 2 réponses | 0
2
réponsesQuestion
Lu decomposition help needed
this is as far as i have got can anyone help me? function [L,U] = LUdecomp(A) n = size(A,1); %number of rows m = size(A,2...
plus de 6 ans il y a | 1 réponse | 0
0
réponseresidual r=ax-b ∞-norm
Would this be correct to get infinty norm a = [-5 8 -5; 0 0 12; 3 -7 -3;6 -4 4] b = [1;1;1;1] x=a\b r=a*x-b N = norm(r, I...
plus de 6 ans il y a | 0
| A accepté
Question
residual r=ax-b ∞-norm
This is my code but i dont get the coorect answer a = [-5 8 -5; 0 0 12; 3 -7 -3;6 -4 4] b = [1;1;1;1] x=a\b r=a*x-b x1=sq...
plus de 6 ans il y a | 2 réponses | 0
2
réponsesQuestion
product series in matlab
Error when taking zero. clc clear syms k P1 = symprod((k-(4/k))-5 , k, 0, 3) P2 = symprod((k-(4/k))-5 , k, 6, 100)
plus de 6 ans il y a | 1 réponse | 0
0
réponseQuestion
summation using syms and rounding
is this way correct?Also want the number rounded to the first dp. syms k f = k-4/k-5; v1 = subs(f, k, 1:3) s_sum = sum(v...
plus de 6 ans il y a | 1 réponse | 0
0
réponseQuestion
plotting ellipsoid any help
how can i plot this out ? 4x^2 + y^2 + 9z^2 = 36 thanks
plus de 8 ans il y a | 1 réponse | 0
0
réponseQuestion
the question asks to subplot the contours any idea how?
x = linspace (-1,1); y = linspace (-1,1); [X, Y] = meshgrid(x,y); Z=7*sin(pi.*X).*cos(3*pi.*X); surf(X,Y,Z ) hold on con...
plus de 8 ans il y a | 1 réponse | 0
1
réponseQuestion
i get error saying that z should be a matrix and not a scalar
x = linspace (-1,1); y = linspace (-1,1); [X, Y] = meshgrid(x,y); Z=7*sin(pi.*x).*cos(3*pi.*x); surf(X,Y,Z ) hold on con...
plus de 8 ans il y a | 1 réponse | 0
1
réponseQuestion
secant method help matlab
hi i have been asked to make a function file for secant menthod fxi=f(xi); fxi_1=f(xi_1); % Initialize iteration count ...
environ 11 ans il y a | 1 réponse | 0
