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Find the area of the region bounded by the curves y = x^2 , x = y - 2 in the first quadrant. Please help me guys, please
syms x y1 = x*x; y2 = x + 2; % GEt the intersection point of two curves xi = solve(y1-y2); yi(1) = double(subs(y1,xi(1)));...

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Variable change at every time step
When you are not sure of size b, you can save them into a cell array. a = cell(1000,1) ; for i = 1 :1000 a{i} = b ; end...

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create multiple heatmaps from all xyz files in my folder
d=dir(fname); % fname includes my path for n=1:length(d) if ~d.isdir(n) filename = fullfile(d(n).folder,d(n).name) ; ...

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Convert .mat files to csv file
matFiles = dir('*.mat'); N = length(matFiles) ; for i = 1:N thisFile = matFiles(i).name ; load(thisFile) ; % Do...

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segmenting the lung region
rgbImage = imread('https://in.mathworks.com/matlabcentral/answers/uploaded_files/858110/image.jpg') ; % Removing the extra whit...

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give me solution for working in a matrix of image
You need not to use a loop to find a specific value pixel. You can use == and then count the pixel. I = imread('peppers.png')...

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knn search method for retrival
The methods available are: 'euclidean' (default) 'seuclidean' 'cityblock' 'chebychev' 'minkowski' 'mahalanobis' 'cosin...

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for loop involving matrix with 3 indices
It looks like your RHS matrix is 2D and not 3D. Check your RHS matrix from which you are trying to extract elements. A = rand(2...

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Read CSV with yyyyMMddhhmmss and group months
Read about datevec. This will split the date into year, month, days etc.....from this you can apply the function unique and get ...

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How to save variables in txt files while running in a loop
clc clear all close all n=10; for i=1:1:n for j=1:1:50 V(i,j)=j^2+2*(i+1); end end dlmwrite('fi...

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im finding error in line 18
Note that the index of array starts from 1 in MATLAB. You have used index as 0, so error. Also the logic you have used is not ...

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Create index vector from grouping variable based on a condition
x = [0 0.5 0.6 1 -0.03 -0.6 -0.8 0 0]' ; y = zeros(size(x)) ; y(x<0) = -1 ; y(x>0) = +1 ; T = table(x,y)

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Unrest cell of cells
test_cell={{1,2,3};{2,3,4}}; reshape([test_cell{:}],3,2)'

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Is it possible to do visualize the decision surface for four groups of data by using three variables?
You may refer this link to do the same: https://in.mathworks.com/matlabcentral/answers/407736-plot-3d-hyperplane-from-fitcsvm-re...

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Finding a position of minimum value element in a matrix
A = rand(10,73) ; [iwant,idx] = min(A(:,13:20),[],2) % idx gives column position

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Making a simple flower
@John D'Errico I have seen this question whence asked. Worked on it yesterday and could not upload that time and left home from ...

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How to fix the mapping between colors and values?
x = randi([0 3],10,10); % from 0 to 3 y = randi([0 2],10,10); % from 0 to 2 z = randi([0 1],10,10); % from 0 to 1 cmap= [0 ...

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Problem with the legend command
%% Initialize Input K = 1000000000; % Carrying Capacity of Brain Tumor C0 = 40000; % Initial Brain Tumor Population Size r = ...

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How to read text file and plot scatter plot in matlab
To load the data into MATLAB workspace read about load, readmatrix, importdata. You can use any of these function. Your text f...

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I get an error and what caused it? - Function Plotting
Are you looking for this? x = -5:0.1:5; y = ((2.*cos(x)+exp(-0.4.*x))./(0.2.*x+exp(-0.2.*x))) + ((4.*x)./3); plot(x,y);

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program is not working
This line will not creat any array, it is empty. So loop will not run and the required variables in the plot command are not def...

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How to reshape matrix without repeating values of matrix?
A = [2 5 4 3 1 6 7 8]; [m,n] = size(A) ; iwant = zeros(m,m) ; iwant(:,1) = A(:,1) ; f...

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How to use for loop to read the value of each row of a matrix
Read about for loop and matlab indexing. It is an easy task. % EXample demo A = rand(3,4) ; [m,n] = size(A) ; for i = 1:m ...

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How can I extract the x value corresponding to the given y value from linear fit ?
x= [0.500 0.310 0.220 0.125 0.065] ; y= [100 95.4 63.3 36.8 22.4] ; % USe polyfit p = polyfit(y,x,1) ; xi = polyval(p,80)

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Create and Save a time varying animation of x-y position
You can save animation into a gif file using the below link: https://in.mathworks.com/matlabcentral/answers/94495-how-can-i-cre...

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How would I find the sum of the following:
% 1 −1/2 + 1/3 −1/4 + 1/5 −1/6 + 1/7 ⋯1/x x = 10 ; i = 1./(1:x) ; i(2:2:end) = -i(2:2:end) ; iwant = sum(i)

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How can I solve the error for plot?
clc; clear all ; %% Initialize Input K = 1*(10^-9); % Carrying Capacity of Brain Tumor C0 = 40000; % Initial Brain Tumor Popu...

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Rerun specified line in m-file MATLAB
p = input('Enter the plaintext : ','s'); p = lower(p); pl = length(p); k = input('Enter the key '); while gcd(k,26)~=1 ...

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Need a column vector from ode45, but I keep getting a struct
Read about structures. k3 = 0.1; tspan = 0:100; C0 = 0.6; dCadt = @(t,Ca) (-k3.*Ca.^3); ode_solver = ode45(dCadt, tspan,...

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Plot netcdf map file with pcolor
s = pcolor(arrayLonFullDisk, arrayLatFullDisk,arrayTempFullDisk); shading interp colormap(jet);

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