Answered
I want to draw dual phase portraits in a 4x4 linear differential equation system. My codes contain 4 variables as below (x1, x2, y1, y2). For a given coefficients matrix, when
Looks like an ode function, so use matlab ode solver to solve it. Here I give an example of ode 45. A = rand(4,4); tspan = [0...

5 months ago | 0

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Answered
Create cylinder roll based on height data
You need map the length and the circumference to your true cylinder. cylinder_true_length = 20; cylinder_true_radius = 5; len...

5 months ago | 0

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Answered
reduce samples on a 3d array
Use interp1 my friend, if a is the 160x120x30000 data that you said. [m,n,p] = size(a); a = reshape(a,m*n,p); nSeries = p; ...

5 months ago | 1

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Answered
How to convert one column of a table into numeric data type corresponding to the other column of the same table?
If you have a table T with field names genre and runtime, then genre = {'ab','a','a','o','abo'}'; runtime = [11,12,13,14,45]';...

5 months ago | 1

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Answered
splitting cell array consists of string and numeric characters
Use replace S = {...}; % your n*1 cell array S = arrayfun(@(i)replace(S{i},'*',''),1:1:numel(S),'uniform',false);

5 months ago | 1

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Answered
What should I do?-Array indices must be positive integers or logical values.
Hi, g(i,j) may be zero, then m becomes zero. change it like this clc clear close all a=imread('Screenshot_20210628.jpg'); ...

5 months ago | 0

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Answered
Find an equation of the tangent to the curve at the point corresponding to the given value of the parameter. x=t√,y=t2−2t;t=4
syms t x0(t) y0(t) x y x0 = sqrt(t); % parametric equation for x y0 = t^2-2*t; % parametric equation for y dx = diff(x0); %...

5 months ago | 1

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Question


What if in matlab answer, your answer is robbed by the questioner and he accepts only his all by himself
I have encountered more than twice now. In the answer community, after you answered a question, the questioner made a minor corr...

5 months ago | 2 answers | 0

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answers

Answered
How to Solve for x for 20 functions
You can get symbolic solution by syms K C V B N X eq = K*(B-X)*(N-X)-(C+X)*(V+X); x = solve(eq, X) and the final process is ...

5 months ago | 0

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Answered
opening multiple excel files in different location with a loop
Try following code % Input number of sites N = input('Number of Location? ', 's'); N = str2double(N) % Loop to read all file...

5 months ago | 0

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Answered
Install Curve Fitting Toolbox
Do following steps

5 months ago | 1

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Answered
How to include current array from multiple for loops into csvwrite filename
Hi, try this command instead csvwrite([num2str(lat),'_',num2str(lon),'.csv'], csvdata)

5 months ago | 0

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Answered
Can I use the movmean function for a time series?
timeseries不支持movmean呢,可以把对其下面的data做操作,比如 ts = timeseries((1:5)',[0 10 20 30 40]); a = movmean(ts.Data,2);

5 months ago | 0

Answered
How do shade different area with specific y interval
Hi, Wan-Yi Chiu I add three more code lines after your code, then it works. clear x = 0:0.01:9; y = sqrt(x); y0 = y(end:-1...

5 months ago | 0

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Answered
Interpolating [X Y Z V] values on cylinder surface
Actually, scatteredInterpolant function is easy to implement what you think. function plot3D(x,y,z,v,m) % scatter3(x,y,z); Tm...

5 months ago | 0

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Answered
Matlab online does not save my work.
When you use matlab online to save data, all the data will be instored on this website, please check by clicking matlab driver.

5 months ago | 0

Answered
I want to cut/crop an RGB image and paste it on different location in another image
I will show you how to copy Part of image A to a certain position of image B clc;clear A = imread('Lena.jpg'); A = imresize(A...

5 months ago | 0

Answered
2d Unsteady state heat conduction equation using Gauss-seidel method
Hi, Rajat Powade I have checked your code carefully and I know you have used the 5-point Gauss-Seidel difference method to obta...

5 months ago | 0

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Answered
How to add column (after multiplication) in file imported from excel
Then if you have new column named newColumn previousTable = readtable('...'); newTable = [previousTable, table(newColunm)]; w...

5 months ago | 0

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Answered
How to write following equation with "dsolve" command?
Hi, That means There is no symbolic solution for the differential equation you give.

5 months ago | 0

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Answered
how to swap some vector value?
A general answer is S = 1:100; % count = 1; copyLength = 2; % copyStep = 10; % copyStep>copyLength while count<=numel(S)-co...

5 months ago | 0

Answered
Random values in timetable
Do by the following code data = timetable; n=1; for i = 1:5 Time = datetime('now'); Conductivity = rand(1,1); ...

5 months ago | 1

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Answered
Matrix 'if' statement
If you do not want the loop, then M = 100; N = 100; [j, i] = meshgrid(1:N,1:M); q = i>j; A(q) = i(q); A(~q)=j(~q);

5 months ago | 1

Answered
How to plot a rectangle from a single point ?
Hi, Use rectangle function rectangle('Position',[0,0,2,4]); % [x_left_down_corner, y_left_down_corner, length, width] Use a...

5 months ago | 0

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Answered
How to reference previous value in an array without a for loop?
use i=2:size(data,1); data.Var3(i)=interp1(ref_data.x,ref_data.y,data.Var2(i))-interp1(ref_data.x,ref_data.y,data.Var2(i-1...

5 months ago | 1

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Answered
how to find the find the different rows in 2 matrices based on 2 conditions?
% I just try my best to catch your idea by looking at your words, my engish % is not so good but I want to help you with this p...

5 months ago | 0

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How to sort a 3D matrix according to the value of each element?
I think you want make something gif to show how the numbers are sorted? % sort show % show bubbling clc;clear % load('Number...

5 months ago | 0

Answered
How to display the output as table shown below?
You can use a table to achieve the output Node = reshape(permute(z,[1,3,2]),numel(z)/size(z,2), size(z,2)); Nodenumber = char ...

5 months ago | 0

Answered
Read in numbers as text from excel
IF in excel, a number with high precision is not stored with text format, it cannot be read by readcell with string format for h...

5 months ago | 0

Answered
Plotting 4D function
In the finite element analysis, you have the coordinates of nodes and elements for node order. Also, to each node, the attached ...

5 months ago | 0

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