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Keeping same colors for the same groups in different group scatter plot
P = rand(1000,2) ; x = P(:,1) ; y = P(:,2) ; idx = kmeans(P,4) ; figure h = gscatter(x,y,idx) ; % Get colors C = resha...

約3年前 | 1

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Why doesn't it work ? Please help
dt = 0.01; t = 4; T = 0:dt:t; % First Quarter r1 = 0:dt:t/4 ; p1 = sin(pi.*r1) ; plot (r1,p1) % Define second Qua...

約3年前 | 0

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matlab polyfit multiple sets of y data
Run a loop for each set..... Let y be your mxn data and x be your 1xn data. p = cell(m,1) ; for i = 1:m p{i} = polyfut...

約3年前 | 0

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Can't run my 'if, elseif, else' code
score= randi(100); if score < 20 grade = 'D'; elseif score < 40 grade= 'C'; elseif score < 60 grade= '...

約3年前 | 0

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cell array into matrix
Read about cell2mat.

約3年前 | 0

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Not enough input arguments
f = @(x,y) x.*y + 10*sin(x).*cos(y); x = linspace(0,2*pi) ; y = linspace(0,2*pi) ; [X,Y] = meshgrid(x,y) ; Z = f(X,Y) ; su...

約3年前 | 1

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can you help me to solve this equation?
syms x P = sqrt(27.8*exp(5*x)-1) == cos((120*x^2+sqrt(2*x))/(17*x-65))^(-1) ; s = vpasolve(P,x)

約3年前 | 0

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Syntax problem with a user-defined function with sine
function r = my_function(thet) r = pi*(3-sin(theta)^5) ; end Save the above, it will be saved on he name my_function.m. ...

約3年前 | 0

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Matrix multiplication gives different result than manual dot products with each column
As you are comparing floatting point number, you should not use isequal. You should proceed like shown below: N = 1000; B = 10...

約3年前 | 0

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How to plot the streamlines and arrow surface in MATLAB from columns of data?
clc ; clear all ; % T = readtable('https://in.mathworks.com/matlabcentral/answers/uploaded_files/1311670/streamlines%20plot.txt...

約3年前 | 0

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trying to align multiple sin waves onto same graph with the period of the wave on the x axis.
Take same time array for all the waves. g = 9.807; T = 11; H = 4; d = 30; CD = 0.85; CM = 1.77; Rho = 1025; D = 1; u =...

約3年前 | 0

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Double X-axis(t,p1) and single Y-axis(p2) depending on t
T = readtable('https://in.mathworks.com/matlabcentral/answers/uploaded_files/1309930/b1.xlsx') ; t = duration(T.Time); p1 = T....

約3年前 | 0

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How to apply the same style/color and axes labels to all subplots?
colors = ["k"; "r";"g";"r";"g"]; lines = ["-"; "-";"-";"--";"--"]; tiledlayout(2,2); ax(1) = nexttile ; plot(rand(10,1)...

約3年前 | 1

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Generating lognormal random numbers
Read about lognrnd

約3年前 | 0

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How to get the decimal values using solve in MATLAB
Read about vpasolve, double.

約3年前 | 1

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How do I repeat the comand for another line
dt = dx1./v; % let dt be 10x1 array m = length(dt) ; n = 60001 ; temp0 = zeros(m,n) ; for i = 1:n tempo(:,i) = 0:dt...

約3年前 | 0

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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',...

約3年前 | 0

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

約3年前 | 1

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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')

約3年前 | 1

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Please help, I keep getting this error... Error using plot Not enough input arguments.
Months=["Jan";"Feb";"March";"April";"May";"June";"July";"Aug";"Sept";"Oct";"Nov";"Dec"]; EnergyDailyAve = [33.677 76.714 69.6...

約3年前 | 0

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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.

約3年前 | 0

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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...

約3年前 | 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...

約3年前 | 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...

約3年前 | 0

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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 ...

約3年前 | 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...

約3年前 | 1

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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...

約3年前 | 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...

約3年前 | 0

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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...

約3年前 | 1

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

約3年前 | 0

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