
Wan Ji
Wuhan University
Research Interest: computational mechanics and modeling the world
Python, C++, C, MATLAB, Fortran
Spoken Languages:
English, French, Mandarin
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5 Questions
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Submitted
read abaqus input file to get the nodes and elements
This readinp function can load the node and element data from abaqus inp file.
3 månader ago | 16 downloads |

How to show node/element numbers on the boundary ONLY?
Hi, friend, Here are some tips for you. Firstly, you can find those edges (an edge is generally denoted by two nodes) that are...
6 månader ago | 0
Call a folder from desktop and use images inside it
Hey, friend, Using uigetfile is a nice choice, for example [file,path,indx] = uigetfile( ... {'*.jpg;*.png;*.tiff;*.tif;*.bmp...
6 månader ago | 0
| accepted
Question
Matlab default font monospace is not a wise choice
Did anyone encounter a problem when writing an m-script on matlab? The problem is that your naked eyes can't tell the number '1'...
8 månader ago | 1 answer | 0
1
answerHow can I fix my function?
Hey, friend Just try the inline function ispythag = @(a,b,c)a.^2+b.^2 == c.^2; a = ispythag(1,2,3) b = ispythag(3,4,5) Then...
8 månader ago | 0
| accepted
Matlab versions supported on Windows 11?
WINDOWS 11 itself should support running the softwares on win10. ELSE microsoft would not release it and clients would not use i...
8 månader ago | 0
Using ODE45 for first order diff equation with three different variables
For example function dxdt = func(t,x,g) dxdt = zeros(3,1); dxdt(1) = (0.1*x(1))+(0.25*x(2))-(g*x(3)); dxdt(2) = (0.1*x(1))+(...
8 månader ago | 2
| accepted
Solved
The Piggy Bank Problem
Given a cylindrical piggy bank with radius g and height y, return the bank's volume. [ g is first input argument.] Bonus though...
8 månader ago
how to write to solve this type of system of equations ?
Hey friend Just expand the left items of the two equations, extract u'' and v'', then an ode45 solver is there for you.
8 månader ago | 0
multiple graphs in one script
Modified the code as %% 6 x = ([-2*pi:0.1:2*pi]); f = x-sin(x) g = 1-x.*cos(x) figure(1);clf; plot(x,f,x,g) title('f(x) &...
9 månader ago | 0
How to check if an array is empty without using any built in functions
Use isempty x = []; isempty(x) Then the answer is ans = logical 1
9 månader ago | 1
| accepted
I want to co-relate the local coordinate system with global co-ordinate system of a 8-noded element. How to do it in matlab?
You need to add the element information element_id = 5; % for example, the local element id is 5 selected_element = element(el...
9 månader ago | 0
| accepted
Question
I don't know how to avoid eval
Hi friends from community, I am very confused on how to manage 'eval' function existing in my code, i need it to be removed fro...
9 månader ago | 3 answers | 0
3
answersTotal Solution Differential Equation
If u(t) = 1, then your solution is right. If it is a function with respect to time, then your solution is wrong. Exact code: ...
9 månader ago | 0
How to plot such figure in MATLAB?
use polarplot theta = 0:0.1:pi; r = 1+0.6*sin(10*theta); polarplot(theta,r); set(gca,'ThetaLim',[0 180]) set(gca,'Rdir','re...
9 månader ago | 1
| accepted
How to plot a 3D vortex flow
If you donot have a mesh, then you need to reconstruct your mesh! X = X(:); Y = Y(:); Z = Z(:); U = U(:); V= V(:); W=W(:); min...
9 månader ago | 0
| accepted
Saving the regression trained model
You should save the trained model after click the 'export' the model to workspace. (you can see you saved model in workspace) ...
9 månader ago | 0
| accepted
Solving 3 simultaneous equations using solve.
Do not use 'pi' use pi instead %define attributes: gamma=21.05; phi=35.55; phi1=0.75*phi; d=0.6; syms L Rs Rb; zc=(0.3*ph...
9 månader ago | 0
Solved
Calculate cosine without cos(x)
Solve cos(x). The use of the function cos() and sin() is not allowed.
9 månader ago
Solved
Approximate the cosine function
Without using MATLAB trigonometric functions, calculate the cosine of an argument |x| to a precision of |0.0001| *Hint:* You ...
9 månader ago
How to add consecutive numbers from a column in a .txt file?
Just use movsum a = [1 1 8 2 3 1]; b = movsum(a,2); % I should apologize for not adding 2 b = b(2:end) The answer b = ...
9 månader ago | 1
| accepted
How do i write the function for the taylor polynomial of cos(x) using for loops and no anonymous function
If a large x is selected, then use function Pn = taylor_cos(a,n) x=mod(abs(a),2*pi); % if(x>=pi) x = 2*pi-x; end Pn=1;...
9 månader ago | 0
| accepted
How to use sym and function handle(@) in same code
Hi, use matlabFunction, my friend syms theta Ai = cos(theta).*[1 1 2; 4 5 6; 9 1 3] Bi = tan(theta).*[6 9 1; ...
9 månader ago | 0
| accepted
How to average first two dimension of 3D array/matrix?
Just use mean function to average first two dimension of 3D matrix a = rand(2,3,4); % I just use rand function so the result is...
9 månader ago | 1
Save points or data in right order
I have answered this question before, now I have a better solution to this problem which can identify many connected regions cl...
9 månader ago | 0
| accepted
How to make a={'1','2','3','4'} to b={'1234'}
The simple way is a={'1','2','3','4'}; b = {[a{:}]} Answer b = 1×1 cell array {'1234'}
9 månader ago | 0
| accepted
how do you sum using loop?
x=1:100; f=@(x)x.*(1+x); S=sum(f(x));%this should be ok %or use loop f=@(x)x.*(1+x); S=0; for i=1:100 S=S+f(i); end...
9 månader ago | 0
How to form a sphere with 1's in a 3D matrix
If there is no scale factor effect with different directions: m = 80; n = 100; p=90; [px,py,pz] = meshgrid(1:n, 1:m, 1:p); ra...
9 månader ago | 1
| accepted
How to sum the values when they are bigger than 25, 50, 75, (conditional) and they are from the same group?
That's quite simple, you don't need to compare them clc;clear ID = ['1_A' ; '1_A'; '1_A'; '2_B'; '2_B'; '3_C'; '3_C';...
9 månader ago | 0
| accepted
How to i change the SNR to Vector?
SNR = -20:10:30; a(numel(SNR)) = helperModClassTestChannel(); for i = 1:1:SNR a(i).SNR = SNR(i); end
9 månader ago | 0