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Trung VO DUY


58 total contributions since 2019

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Answered
How to solve matrix equation for variable inside a summation? Analytical or numerical.
Hello, There are several ways that you can apply. Here, I just show you an example how to solve this problem by using solve fu...

environ 3 heures ago | 1

| accepted

Answered
Regarding the matrix indexing,
Hello, How about if you modify your function like this function T = Euler_explicit(T_0, L, P,C, h) A = inv(C)*L; ...

environ 3 heures ago | 0

| accepted

Answered
Finding the nonzero element in a specific row
Hello, Yes, there is. You can refer this simple example A = [1 2; 0 3] [rows,cols,vals] = find(A==0)

environ 17 heures ago | 0

Answered
How to select numbers?
Hello, You can simply type F = rand(3) M = rand(3) result = F(F<M)

2 jours ago | 1

Answered
Result of FEA does not change, on changing the Material properties with same load
Hello, I have run your code, results were not constants when parameters had changed. For example, if you set "PR" (poisson r...

3 jours ago | 0

| accepted

Answered
Calculating time duration of a signal
Hello, You also could refer this code to get the output clear signal=[0 0 0 1 1 1 1 0 1 1]; n = length(signal); a = diff(...

5 jours ago | 0

| accepted

Answered
make the for loop run faster
Hello, How about if you try to use this time = 1:100; T0 = 0; sunrise = 10; Tmin = 1; Tmax = 100; Tmax_time = 50; suns...

5 jours ago | 0

| accepted

Answered
While solving boundary value problems (using bvp4c) the graph is plotted as the command ""plot (x,BS(1,:))"" but if I want the graph between x and y and not x and boundary solution (BS) what should I do ?
Hello, You might simply plot x and y like this plot(sol.x, sol.y, '-o') Several examples of how to use bvp4 and deval can b...

5 jours ago | 0

| accepted

Answered
How to integral a composite function in yalmip?
Hello, You define z as a function of x1, x2, and u1. But, you apply the integral function to compute the integral of z over th...

6 jours ago | 0

| accepted

Answered
How to draw cumulative histogram?
Hello, You shoud do some tasks to approximate cumulative probability from your data. Then you just plot it. Below, will be a r...

6 jours ago | 0

Answered
Combining two sets of data into a singular array
Hello, How about if you can combine into matrix with many column like this for ii=1:5 time=randn(5,1); data1=randn(5,1); c...

6 jours ago | 0

Answered
Calculate minimum distance between point and steady but NON differentiable function
Hello, There is two options that you can think Assume we have a point P(xp, yp) and a function f(x) that we may not have der...

7 jours ago | 0

| accepted

Answered
Go back to initializing values using for loop when condition is not met
Hello, There are several ways, one approach that you can use as follows clear n = 100; x = zeros(1,n); y = zeros(1,n); fo...

9 jours ago | 1

| accepted

Answered
Plotting integral over an interval
Hello, The way you try to plot the integral may be not correct, for x0 you can compute the integral by using the integral fuct...

10 jours ago | 0

| accepted

Answered
How to index matrices inside a loop?
Hello, You can change your code a bit like this %% Quantum Control format long clear all clc %% Variables time = -20000...

10 jours ago | 1

| accepted

Answered
Convert Column Vector to arrey matrix
Hello, You may see this function, it will help you https://www.mathworks.com/help/matlab/ref/reshape.html

11 jours ago | 0

Answered
solve not returning two answers
Hello, Maybe you could try with another approach, for example, eq = @(y)2*log((((N-y)./(q*N)).^(N-y)).*((y./((1-q)*N)).^y)) ...

12 jours ago | 1

| accepted

Answered
Index in position 1 exceeds array bounds (must not exceed 1).
Hello, There are several approaches that you can try to eleminate the point inside the circle. Here, I can show you a solution...

12 jours ago | 0

| accepted

Answered
How can i average a 1-D array every n elements?
Hello, I think this function is exactly what you want https://www.mathworks.com/help/matlab/ref/movmean.html

12 jours ago | 0

Answered
Solve out a symbol
Hello, If you write solve(k,s) the solve function will solve another equation k == 0, i.e, w*sqrt(e*m/2)*sqrt(sqrt(1+(s/(...

12 jours ago | 1

| accepted

Answered
Not able to get plot
Hello, You used the linespace function with wrong parameter. Here is instruction of linespace function: linspace(X1, X2, N) ...

12 jours ago | 1

| accepted

Answered
How can I define the time steps of an x-y plot?
Hello, To get the same figure, you should refine the time step and then you should store value of X and Y with respect to t be...

13 jours ago | 1

Answered
Counting the Same Occurance of a row string
Here is a possible solution that you can refer clear pj1 = { 'AVX', '0601' 'AVX', '0603' 'AVX', '0603' 'EPC', '0603' '...

15 jours ago | 1

Answered
Access multiple folders and extract specific files
Hello, If I understood you well, the code below could help you clear root_folder = 1:12; fig_number = [4 8]; for i = 1:...

16 jours ago | 0

Answered
How to extract specific rows from a text file?
Hello, Here is an solution that you can refer, clear FileName = 'HP1_ordered.txt'; NewFile = 'HP1_ordered_skip10.txt'; ...

16 jours ago | 1

| accepted

Answered
i wanna improve my function
Hello, As guided by @Geoff Hayes, I could give an example code here. function [res] =contain(v,u) res=true; idx = find(u ==...

17 jours ago | 0

Answered
Write to file inside a loop
Hello, You can refer a simple solution as follows saveb1 = []; for (your loop) your code to compute b1; ...

17 jours ago | 1

Answered
Calculate volume below a 3D points
Hello, There is a problem with the interpolation function which is not good to give us a smooth fuction. If you plot the "inte...

22 jours ago | 0

Answered
Taylor Series of e^x on point 1
Hello, At least, I found a mistake in your program. Let see the line T = symsum((F(o,1)*(x-p)^N)/factorial(N), N, 0, o); Th...

22 jours ago | 0

Answered
Minimization of two variables
Hello, Here is an example for your problem, which you can refer clear xiyi = [0,1; 1,3; -1 2]; x0 ...

22 jours ago | 0

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