If statement in a for loop
You can do like this A = mat2cell(rand(40,40)+0.5, [10 10 10 10], [10 10 10 10]); % A is your data randomly generated, you ca...

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...

| accepted

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...

| accepted

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; ...

| accepted

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]';...

| accepted

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);

| accepted

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'); ...

| accepted

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); %...

| accepted

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...

2

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 ...

| accepted

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...

| accepted

Install Curve Fitting Toolbox
Do following steps

| accepted

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

| accepted

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);

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...

| accepted

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...

| accepted

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.

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...

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...

| accepted

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...

| accepted

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

| accepted

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...

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

| accepted

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);

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...

| accepted

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...

| accepted

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...

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...

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 ...

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...