Wan Ji

Wuhan University

Last seen: 2日前 | 2021 以来アクティブ

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Research Interest: computational mechanics and modeling the world

Programming Languages:
Python, C++, C, MATLAB, Fortran
Spoken Languages:
English, French, Mandarin

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解決済み

Prime factor digits
Consider the following number system. Calculate the prime factorization for each number n, then represent the prime factors in a...

3日前

解決済み

Alphabetize by last name
Given a list of names in a cell array, sort the list by the last name. So if list = {'Barney Google','Snuffy Smith','Dagwood ...

3日前

解決済み

3D indexes
Generalisation in 3 dimensions of the <http://nl.mathworks.com/matlabcentral/cody/problems/43117-2d-indexes Problem 43117. 2D I...

3日前

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Insert zeros into vector
Insert zeros after each elements in the vector. Number of zeros is specified as the input parameter. For example: x = [1 ...

3日前

解決済み

Interpolator
You have a two vectors, a and b. They are monotonic and the same length. Given a value, va, where va is between a(1) and a(end...

3日前

送信済み

read abaqus input file to get the nodes and elements
This readinp function can load the node and element data from abaqus inp file.

7ヶ月前 | ダウンロード 7 件 |

回答済み
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...

10ヶ月前 | 0

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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...

10ヶ月前 | 0

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質問

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'...

12ヶ月前 | 1 件の回答 | 0

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How 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...

約1年前 | 0

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回答済み
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...

約1年前 | 0

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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))+(...

約1年前 | 2

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解決済み

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...

約1年前

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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.

約1年前 | 0

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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) &...

約1年前 | 0

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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

約1年前 | 1

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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...

約1年前 | 0

| 採用済み

質問

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...

約1年前 | 3 件の回答 | 0

3

回答

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Total 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: ...

約1年前 | 0

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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...

約1年前 | 1

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回答済み
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...

約1年前 | 0

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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) ...

約1年前 | 0

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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...

約1年前 | 0

解決済み

Calculate cosine without cos(x)
Solve cos(x). The use of the function cos() and sin() is not allowed.

約1年前

解決済み

Approximate the cosine function
Without using MATLAB trigonometric functions, calculate the cosine of an argument |x| to a precision of |0.0001| *Hint:* You ...

約1年前

回答済み
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 = ...

約1年前 | 1

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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;...

約1年前 | 0

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回答済み
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; ...

約1年前 | 0

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回答済み
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...

約1年前 | 1

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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...

約1年前 | 0

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Wuhan University

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