Chunru

Last seen: 6 dagen ago | Active since 2013

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Matlab矩阵处理。
data = [1 2 2;1 0 2;2 1 4;2 3 6;2 5 6;3 2 1;3 6 5;3 7 8;3 6 4] data(data(:, 1)<3, :) =[]

19 dagen ago | 0

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error in line1and 4
Those are comments which shoud start with % % Calculate the response function using the equation of motion: omega_n = sqrt(k /...

24 dagen ago | 0

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'poly1' unrecognized
x = (0:0.2:5)'; y = 2*exp(-.2*x) + 0.5 * randn(size(x)); f = fit(x, y, 'poly1'); % check the path of fit which fit plot(f...

24 dagen ago | 0

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Creating a time series signal from a known PSD
f = [0,0.0732422000000000,0.146484000000000,0.219727000000000,0.292969000000000,0.366211000000000,0.439453000000000,0.5126950000...

24 dagen ago | 0

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Need values for the Astroid generated in MATLAB
syms x(t) y(t) z(t) x(t) = sin(t); y(t) = cos(t); z(t) = cos(2*t); % specify the t interval fplot3(x,y,z, [-pi pi])

24 dagen ago | 0

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How to format notation to use "... x 10^-5..." instead of "...e..." in this figure
websave("Fig.fig", "https://www.mathworks.com/matlabcentral/answers/uploaded_files/1380189/Fig.fig") h = openfig("Fig.fig", "vi...

24 dagen ago | 1

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Answered
Dot indexing is not supported for variables of this type.
% avoid use variable such as o and O x = rand(256, 236); y = fft2(x,256,256); % assume that you are computing the power p =...

24 dagen ago | 0

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Error: Z must be a matrix, not a scalar or vector and error in solution (line 12): surf(x,y,z);
Change the value of b: %Set the Domain of both x and y by setting the lower limit a = 0 %Enter the l...

ongeveer een maand ago | 0

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Related to Graph ?
sr = [1,2,2,2,3,3,3,4,5]; ta = [2,3,6,8,6,4,7,6,6]; % Use graph weight for SNR snr = randn(size(sr)); % gaussian dist...

ongeveer een maand ago | 0

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How do I go about coding a matrix with entries being the outcome on an equation. for example 5 x 10 with Akj= ksin(kj)+jcos(kj)
k = (1:5)'; j = (1:10); A= k.*sin(k*j)+j.*cos(k*j)

ongeveer een maand ago | 0

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Can't see quiver plot
figure, hold on; axis([0 100 0 100]), axis square, box on; xlabel('x'), ylabel('y'); obslist = [60 60 15; 20 40 7...

ongeveer een maand ago | 0

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help draw curved line between two points
Pos=[ 10009.6827000000 49968.6391000000 618.340200000000 10019.7800000000 49979.0046000000 622.162400000000 10027.3819000...

ongeveer een maand ago | 0

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my arrow is not going directly underneath my subplot. please help to adjust position its driving me not happy tried for 4 hours
% Plot the circle subplot(3, 4, 3); theta = linspace(0, 2*pi, 100); centerp = [0 0]; radiusp=1; x = centerp(1) + radiusp*cos...

ongeveer een maand ago | 1

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Answered
How to Correct Signal Waveform (may use some filter)
You can try to use a low pass filter. websave("data.mat", "https://www.mathworks.com/matlabcentral/answers/uploaded_files/13728...

ongeveer een maand ago | 0

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Answered
How I can continue vector if I know two points of vector and direction vector?
X0 = 1.5; Y0 = 1.5; Z0 = 3.0; Theta0 = 10; % azimuth Phi0 = -45; % elev XBar = cosd(Theta0) * cosd(Phi0); ...

ongeveer een maand ago | 0

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Answered
Calculate distance considering road network
lat1 = -22.8851078223344; lon1 = -48.4939312250395; lat2 = -22.8315940282463; lon2 = -48.4298167144681; % need mapping too...

ongeveer een maand ago | 0

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Rotating 3 planes on the one graph
doc view

ongeveer een maand ago | 0

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How to detect overfitting in neural network?
It looks that the overfitting is not occuring in your case since the validation performance still keep improving. Overfitting o...

ongeveer een maand ago | 0

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How can I find each character's index within a matrix, from a vector of characters?
Letters =['ABC'; 'DEF'; 'GHI'] vec = 'ACHI' for i=1:length(vec) [r, c] = find(Letters == vec(i)); fprintf("%s: (%d,...

ongeveer een maand ago | 0

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Not enough input agruments
Function should be placed at the end of script or separate file: % Set the circuit parameters and initial conditions res = 10 ...

ongeveer een maand ago | 0

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Signal auto-correlation in matlab (xcorr function)
csd = randn(4, 100, 20); % dummy data % Calculate trial-averaged auto-correlation nchan = size(csd, 1); % channels ntr...

ongeveer een maand ago | 0

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Answered
Evaluating symbolic function with a vector
% take x1 and x2 as two variables syms x1 x2 f(x1,x2) = x1 + x2; x = [ 1 1]; f(x(1), x(2))

ongeveer een maand ago | 0

Answered
"griddata" results in much smaller values than original data
It is due to the duplicate points in data. Griddata is averaging over the duplicate points to have a smaller value than peak. ...

ongeveer 2 maanden ago | 1

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I am getting NaN value from ifft (please guide)
websave("data.mat", "https://www.mathworks.com/matlabcentral/answers/uploaded_files/1359493/data.mat"); load data % Your data ...

ongeveer 2 maanden ago | 0

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How do I fix this invalide expression error?
bessel0 = @(x) besselj(0, x);

ongeveer 2 maanden ago | 0

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I want to use all nested arrays inside each cell.
C = {'A', (1:3).', {["frodo"; "pippin"], {4} {[5;6]}}} b = celldisp(C)

ongeveer 2 maanden ago | 0

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Acceleration to displacement data based on accelerometer
num=readtable("https://www.mathworks.com/matlabcentral/answers/uploaded_files/1352749/Book5.csv"); head(num); % initialize t...

ongeveer 2 maanden ago | 0

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Add information in the figure by clicking on data point
doc datatip

ongeveer 2 maanden ago | 0

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How can I write a matlab code for this iterative function.
% initial value of x(0) x = 0; for n=1:10 x = (1/n)- (1-(1/n+1)) *x +5*exp(x); % check the formula. this one is dive...

ongeveer 2 maanden ago | 0

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how to use solve
There is no close form solution when a and b are arbitrary constant for the equation. If you want to find the numerical solut...

ongeveer 2 maanden ago | 0

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