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FEM post processing: How to plot strain field in MATLAB
Since the strain values to each node can be obtained by interpolate method with the values of the integration point of each ele...

nästan 3 år ago | 0

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How can I write a for loop to do algebra over multiple arrays?
Do loop with indices of t: a = linspace(3,28,28)'; b = linspace(4,28,28)'; c = linspace(5,28,28)'; d = linspace(6,28,28)'; ...

nästan 3 år ago | 1

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Answered
how to access element of map when I don't know unique keys?
You can get keys and values by keys = M.keys; values = M.values;

nästan 3 år ago | 0

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Answered
How to index match excel file in matlab
You can do with following code T = readtable('example.xlsx', ... 'ReadVariableNames', true,... 'PreserveVariableNames...

nästan 3 år ago | 0

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How to combine matrices
Hi, friend! You can achieve this by following command: bhu = reshape(permute(NETPLP,[2,1,3]), 3, size(NETPLP,1)*size(NETPLP,3))...

nästan 3 år ago | 0

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Answered
I am trying to find the displacement of this below 2nd order differential equation.
Hi, friend! The ode you provided is a 2nd order ode. Follow the code you will know how to solve this ode. But at first, since bo...

nästan 3 år ago | 1

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Error in symengine for symbolic integration
This is a bug in matlab. A good way to avoid this bug is just to predefine symbols rather than use constants in the symbolic pro...

nästan 3 år ago | 0

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Answered
I am trying to plot an stl file but it showing error
Use triplot FV = stlread('Part2.stl'); triplot(FV)

nästan 3 år ago | 1

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How to find points inside a region defined by a rotated ellipse
Here is an example of telling how to calculate whether a given point [x y] lie within the regoin defined by this ellipse. funct...

nästan 3 år ago | 1

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Answered
Filling area between lines with color
If your horizontal coordinates is t array, then patch or fill can help maxTime = max(t(:)); patch([0, maxTime, maxTime, 0], [-...

nästan 3 år ago | 0

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Answered
How to calculate the whole time that my signal values is more than zero?
If your signal array is A, and with a time array t the same size as A. The total time the signal is greater than zero will be ...

nästan 3 år ago | 0

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Answered
How can I figure out which element in the array is repeated and how many times?
Hi, friend, using histcounts, things will be simple A = {'A', 'B', 'C'; 'D', 'E', 'F'; 'A', 'G', 'H'; 'C', 'Y', 'C'}; A = cate...

nästan 3 år ago | 1

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Answered
changing values of RHS with each time step in ODE
Is F time dependent ? If so, just write a function named Force function F = Force(t) t_array = []; % This is t array from xls ...

nästan 3 år ago | 0

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Making a matrix of R*C size that takes the values randomly from an array- Y.
Hi, friend! randi is OK, it can help, look Y = [ 1 6 1 8 4 5]; R = 7; C = 8; indices = randi([1,numel(Y)], R, C); A = Y(indi...

nästan 3 år ago | 1

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Answered
How to extract points from a 3D plot that fall within a particular distance from the center coordinate?
If you have Coor is a n by 3 matrix as the coordinates of n points in 3d space and a fixed point (x,y,z). Then the points within...

nästan 3 år ago | 1

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Answered
memory shortage: Solve Stiff ODEs
你好！这个直接把 options = odeset('Vectorized','on','JPattern',jpattern(N)); 改写成 options = odeset('Vectorized','on'); 就可以了，因为你给出的ode...

nästan 3 år ago | 0

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Answered
find inverse of distribution function
See the help doc with icdf

nästan 3 år ago | 0

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How Can I solve this equation ?
syms r t m rp q = int(rp*sin(m*pi*r),rp,0,1); % the integral r prime from 0 to 1 V = symsum(exp(m*pi*t)*sin(m*pi*r)*q, m, 1, 1...

nästan 3 år ago | 0

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Answered
How can one create a timetable with one column (all 1) with beginning date and end date?
I have got your idea and write a code for you: startdate = datetime('2020-01-02'); enddate = datetime('2020-05-15'); dt = end...

nästan 3 år ago | 0

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Answered
Reshape a vector to a matrix
Just use reshape and transpose it! x=[1 2 3 4 5 6 7 8 9 10] ; A = reshape(x, 5, 2)' Then we get A = 1 2 3 ...

nästan 3 år ago | 1

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Answered
How to change the C values that matches a 3 coordinates position condition?
Hi, friend! Just use scatteredInterpolant % Here is how I process Ftop = scatteredInterpolant(top(:,1), top(:,2), top(:,3), 'l...

nästan 3 år ago | 0

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Answered
Solving coupled second-order ODEs using ode45 (equations of motion)
The odefun can be obtained using syms command syms M x z Y alpha V_0 l h_0 V = V_0 * ((exp(-alpha * z) - 1)^2 - 1) diff(V, z)...

nästan 3 år ago | 0

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Answered
Add up a certain number of consecutive values followed by the next values in a row
I'll write for you! function a = everynsum(arr, n) p = length(arr); a = sum(reshape(arr,n,p/n)); % in case mod(p,n)=0 end

nästan 3 år ago | 0

Answered
How can I split a file at defined intervals into multiple files?
s = fileread('test.txt'); % read files to string s k = find(s==newline); % find newline position s = mat2cell(s,1, diff([0,k(4...

nästan 3 år ago | 0

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Answered
Can I specify the color of a graphics object by its index in the ColorOrder?
If you want different colors, you can use matlab build-in color series like jet, hsv, bone, copper. Eaxmples are n = 1:6; colo...

nästan 3 år ago | 0

Answered
converting an excel formula into matlab
Hi, friend, I have translated your excel function to matlab command line. clc;clear a = readtable('C-RMSfluctuation.xlsx','Pr...

nästan 3 år ago | 0

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Answered
how to find out node coordinates for a simple quad element?
Hi, friend! It seems you are studying the finite element method. For fem analysis, two important things for preprocessing are n...

nästan 3 år ago | 2

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Answered
How can I create P-code for main script along with their sub-scripts?
You can make main file like this function main() % main file body end function fun1() % fun1 end function fun2() % f...

nästan 3 år ago | 0

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Answered
Translate python into matlab
We firstly make data a matrix. Each row is named grades, and the row number is a. Then python code can be tranlated to matlab on...

nästan 3 år ago | 0

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How I can combine this cell values in a single matrix?
If X{1} is 1x7 array, the simplest way is matrixOut = cell2mat(X')

nästan 3 år ago | 0