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Muhammad Usman
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PhD (Scholar) Mathematics
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提问
How to solve 2nd order BVP using Chebyshev Spectral Method?
Hi, I am tring to solve the following BVP using Chebshev Spectral Method: with boundary conditions: I am following the cod...
1 year 前 | 1 个回答 | 0
1
个回答提问
How to find the order of the power of A matrix?
Hi, I want to calculate the order of the power matrix A. Here order doesn't mean for rows into columns but the power n of the ma...
1 year 前 | 2 个回答 | 0
2
个回答已回答
How can I solve this?
% Solve the system of equations starting at the point [0,0,0]. % PL = x(1); c = x(2); k = x(3); % Initial guess is [0,0,0], yo...
How can I solve this?
% Solve the system of equations starting at the point [0,0,0]. % PL = x(1); c = x(2); k = x(3); % Initial guess is [0,0,0], yo...
2 years 前 | 0
提问
Problem in implementing Echelon Form and Solve System of Linear Equations
Here is my code: A = [3 2 1;-4 5 7;1 0 -9]; b = [1;4;5]; % Solving System of Linear Equations by using built-in command for i...
2 years 前 | 1 个回答 | 0
1
个回答提问
How to do manual operation of cross multiplication or substitution?
If syms A B x y = A*x^2 + B*x; dy = diff(y) d2y = diff(dy) then how to get where d2y is the second derivation; using subs o...
2 years 前 | 1 个回答 | 0
1
个回答提问
Optimize legend command?
Hi, I am struggling with LaTeX in legend, so far I wrote legend like: legendStrings = string(n); l = legend(legendStrings); s...
2 years 前 | 1 个回答 | 0
1
个回答提问
What's the problem with this simple anonymous function?
Here's an simple code: clear all; clc; close all; n = 1:3; for i = 1:numel(n) %numel is used if someother time I'll use negat...
3 years 前 | 1 个回答 | 0
1
个回答提问
How to adjust initial condition to nondimensionalization of coupled ODE?
Here is the code for dimenional and non-dimensional form of coupled ODEs using ode45, but both results are not agreeing. Please ...
3 years 前 | 0 个回答 | 0
0
个回答提问
ODE solution using Fourier series
Hello, I am trying to solve first order ode () using Fourier Series. I wrote the code, but I was doing something, please idetif...
3 years 前 | 1 个回答 | 0
1
个回答提问
Calling Euler Method to solve Shooting Method
Hi, I am trying to solve a BVP: y''(x) +5y'(x)+4y(x) = 1 with boundary conditions y(0) = 0 and y(1)=1 using shooting method. ...
3 years 前 | 1 个回答 | 0
1
个回答提问
How to correct the regenerated plot of given analytical solution of ODE?
for for The analytical solution for this ODE is given belown and written as MATLAB in code routine: for t = -log(1-a)...
3 years 前 | 0 个回答 | 0
0
个回答提问
Addition of numbers in array as string
I am following these lines of code, but generating error when I do: x = randi([0,9],1,20); y = randi([0,9],1,20); x_new = st...
3 years 前 | 1 个回答 | 0
1
个回答提问
Addition of numbers in array
Lets' say I have 2 vectors: x = [7 4 6]; y = [1 4 4]; But these are not just vector consider them as A number, i.e., 746 and ...
3 years 前 | 1 个回答 | 0
1
个回答提问
Plot with smaller variation in input argument under user defined function?
I am stuck with a smaller concept that How to Plot with smaller variation in input argument under user defined function? For ex...
3 years 前 | 1 个回答 | 0
1
个回答提问
How to save last three values from for loop?
I just got stuck to save the last three values of r from the for loop, please help me in this regard. yl = 1; rl = [0, yl] ; ...
3 years 前 | 1 个回答 | 0
1
个回答提问
How to combine the result of for loop?
Here is a very simple line of code: x = 3; A = 1:x; for i = 1:length(A) y = repelem(A(:,i),i); Y = y(1,:) end I w...
4 years 前 | 1 个回答 | 0
1
个回答提问
Sum and Difference across row and column
Let say there is square matrix of order n-by-n, and n is odd integer A = rand(3) A = 0.4218 0.9595 0.8491 0...
4 years 前 | 2 个回答 | 0
2
个回答已回答
Trouble using fsolve with two non-linear equations and 3 parameter
I think it will works like in this way: function F = eql_coef(x) % x(1) == a % x(2) == d K_H2O = 20.999; K_OH = 1.0478; p ...
Trouble using fsolve with two non-linear equations and 3 parameter
I think it will works like in this way: function F = eql_coef(x) % x(1) == a % x(2) == d K_H2O = 20.999; K_OH = 1.0478; p ...
4 years 前 | 0
已回答
Is this a bug in bar plot
I suggest you to use two additional lines of code highValue=10E15; y = [2 2 3*highValue; 2 5 6*highValue; 2 8 9*highValue; 2 1...
Is this a bug in bar plot
I suggest you to use two additional lines of code highValue=10E15; y = [2 2 3*highValue; 2 5 6*highValue; 2 8 9*highValue; 2 1...
4 years 前 | 0
提问
merge mat files with different size?
Hi, Consider I have different .mat files and I want to merge them all and remove the repeated values, but the first problem I a...
4 years 前 | 1 个回答 | 0
1
个回答提问
need help to plot a mesh
I just want to mesh plot a dirac delta function, can somebody help me to do so. I wrote some lines of code to plot dirac delta ...
4 years 前 | 1 个回答 | 0
1
个回答提问
What is the error in this computation?
Here I want to plot a simple sum. I computed it manually by iterating different values, and then did it same by using for loop,...
4 years 前 | 1 个回答 | 0
1
个回答提问
Error in computing numerical solution?
I am enable to compute numerical solution, as it generates weird Initial conditions (may be) compared to the inintial value of U...
4 years 前 | 0 个回答 | 0
0
个回答提问
Spectral Method without FFT in MATLAB
Can somebody guide me that how spectral method will be implemented in MATLAB to PDE (lets say homogeneous heat equation with per...
5 years 前 | 0 个回答 | 0
0
个回答提问
Specrtal Method for Heat Equation
I have one dimensional homogeneous heat eqaution. I want to solve it numerically using by supposing where Taking time deri...
5 years 前 | 0 个回答 | 0
0
个回答已回答
How do i use boundary conditions to find variables in an equation
if you let Lp=constant and make changes in soln = solve(u,eqns,vars); to soln = solve(eqns); you will get a structure soln ...
How do i use boundary conditions to find variables in an equation
if you let Lp=constant and make changes in soln = solve(u,eqns,vars); to soln = solve(eqns); you will get a structure soln ...
5 years 前 | 0
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已回答
setting column of a matrix to zero
You haven't define constants a and z, and a vector mt, so I suppose a=-1, z=4 and mt=rand(1,50) and following lines of code to p...
setting column of a matrix to zero
You haven't define constants a and z, and a vector mt, so I suppose a=-1, z=4 and mt=rand(1,50) and following lines of code to p...
5 years 前 | 0
提问
How to plot analytical solution in terms of Fourier Series
I want to plot the analytical solution of the equation given below: for x=-1:1 and t=0:0.4:2 for as suitable values of p. I...
5 years 前 | 1 个回答 | 0
1
个回答提问
How can i plot an inline function?
I wrote a code in which i got and inline function as U = Inline function: U(p,t,x) = (372863112183097.*exp(500....
5 years 前 | 2 个回答 | 0
2
个回答已回答
Adjust subscript style / height
use the following after the plot command xlabel("y_{" + n + "}", 'Interpreter', 'tex') %for alphabet and xlabel(" \Omega_{"...
Adjust subscript style / height
use the following after the plot command xlabel("y_{" + n + "}", 'Interpreter', 'tex') %for alphabet and xlabel(" \Omega_{"...
5 years 前 | 0