Create a point with a number inside
th = linspace(0,2*pi) ; x = cos(th) ; y = sin(th) ; % Make numbers idx = 1:5:length(th) ; figure hold on plot(x,y,'k',...

1 month ago | 0

Pulling Vectors From 3D Matrix Based on Indicies
A = rand(30,40,10) ; iwant = squeeze(A(13,33,:))

1 month ago | 1

How to have two legends on the same plot?
figure hold on plot(rand(1,10),'r') plot(rand(1,10),'b') legend('One','Two')

1 month ago | 1

Months=["Jan";"Feb";"March";"April";"May";"June";"July";"Aug";"Sept";"Oct";"Nov";"Dec"]; EnergyDailyAve = [33.677 76.714 69.6...

1 month ago | 0

Calculate area under peak
Read about the functions polyarea, trapz. Provde the (x,y) data of the curve for which you want to calculate the area.

1 month ago | 0

How to combine the data from multiple netcdf files and make it one .mat file?
%% List of files list_of_files= dir(fullfile(ddir,'*.nc')) %% Read Rainfall Data filename = fullfile(ddir, list_of_files(1).n...

1 month ago | 1

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Can anyone tell me why I'm getting an error here? "xold=xnew;'' is giving me an error in this statement and I'm not sure why.
These lines: xold=3.5; d=0.01; % Iteration 1 xold=xnew; xnew=xold-d*xold*fx(xold)/(fx(xold+d*xold)-fx(xold)); will obvious...

1 month ago | 1

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Solve the given system of equations using the Gauss-Jordan elimination method with MATLAB.
Read about rref A = [0.1 -2.5 1.2 -0.75 108 ; 2.4 1.5 -1.8 0.25 -81; 0.4 -3.2 1.6 -1.4 148.8; 1.6 1...

1 month ago | 0

data_chirp(:,:,1:2:end); what does this code mean???
It means your data i.e. data_chirp is a 3D data. That line extracts all rows, all columns at odd indices of 3rd dimension. To ...

1 month ago | 0

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How to find largest Peak Values of signal and Save X,Y Values in MATLAB
Read about the function max, findpeaks. The above functions gives you index of the max value, using this index you can get x-v...

1 month ago | 1

How to plot cluster group by circles
You may fit a circle to the cluster data using the following fileexchange function. https://in.mathworks.com/matlabcentral/fil...

1 month ago | 0

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How do I onehotencode a table without encoding variable names?
B = table(); for i = 1:size(MyTable,2) B = [B, onehotencode(MyTable.(i))]; end You may consider using width instead of s...

1 month ago | 0

How to create 4D array of images
Say you have n images each of size p,q. data = zeros(p,q,1,n) ; for i = 1:n data(:,:,1,i) = image1 ; % loop for each i...

1 month ago | 1

sum() missing for certain values
Don't use sum(Vector==x) use tol = 0.0001 ; % set your acceptable tolerance sum(abs(Vector-x)<tol) ;

1 month ago | 0

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plotting data from multiple sheets by ID and day

1 month ago | 0

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Preallocating an array or a vector in matlab before a for loop
Thanks is accepting and/or voting the answer. :)

1 month ago | 0

Preallocating an array or a vector in matlab before a for loop
N = 24 ; sigma_infty = zeros(6,N); eps_infty = zeros(6,N); for k = 1:N % sigma_infty(:,k) = [10*k 0 0 0 0 0]'; ...

1 month ago | 1

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im modelling for two mass drive train , i could not able to know why an index exceed error
function dy= two_mass2(ta,te,k,d,jt,jg,y) x=y(1); y=y(2); dxdt=y(3); dydt=y(4); d2xdt2=((1./jt)*(ta-d*(dxdt-d*dydt)-k*(x-y)...

1 month ago | 0

How to compare each element of two arrays fullfilling a set condition more efficiently / quickly?
A = randi([0,5],10,1); B = randi([0,5],10,1); err = 0.5; [a,b] = meshgrid(A,B) ; idx = a<(1+err)*b & a>(1-err)*b ; r...

1 month ago | 0

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Build arrays under the for loop
R = cell(10,1) ; for i=1:10 R{i}= nonzeros(D(i,:)); end You can access by R{1},R{2},...R{10}. R is a cell array. You ...

1 month ago | 0

How to exclude/extract empty rows/columns in a table?

2 months ago | 1

Error using tf The values of the "Numerator" and "Denominator" properties must be row vectors or cell arrays of row vectors,
Your numerator and denominator are sym class. You need to convert them to double using double. sys = tf(double(numerator) , dou...

2 months ago | 0

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How do I input names properly in a script?

2 months ago | 0

how to convert a.mat file in to png?

2 months ago | 0

How to convert symbolic output to numeric value in Symbolic Math Toolbox?

2 months ago | 0

Animate a line in polar coordinates
In your case r is comlex number which is not allowed. You need to get r as shown below. theta = 0:0.001:2*pi; R = 1 ; x = R...

2 months ago | 0

How to discretize the color in contour bar at smallest possible range?
% Make data for demo [X,Y,Z] = peaks ; vals = [0.000 0.005; 0.005 0.009 ; 0.01 0.05 ; 0.05 0.1; ...

2 months ago | 0

How to plot the graph for a given signal over a range of frequency
w = [0 pi/8 pi/4 pi/2 pi] ; n = 1 ; x = cos(w*n) ; plot(w,x)

2 months ago | 0