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# Chunru

Last seen: 3 days ago Active since 2013

Matlab user since 1990

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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, :) =[]

13 days ago | 0

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

18 days ago | 0

'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...

18 days ago | 0

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...

18 days ago | 0

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])

18 days ago | 0

How to format notation to use "... x 10^-5..." instead of "...e..." in this figure

18 days ago | 1

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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 =...

18 days ago | 0

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...

25 days ago | 0

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...

25 days ago | 0

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...

26 days ago | 0

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

26 days 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...

26 days ago | 1

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How to Correct Signal Waveform (may use some filter)

26 days ago | 0

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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); ...

27 days ago | 0

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lat1 = -22.8851078223344; lon1 = -48.4939312250395; lat2 = -22.8315940282463; lon2 = -48.4298167144681; % need mapping too...

27 days ago | 0

Rotating 3 planes on the one graph
doc view

27 days ago | 0

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...

1 month 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,...

1 month ago | 0

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 ...

1 month ago | 0

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...

1 month ago | 0

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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))

1 month ago | 0

"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. ...

1 month ago | 1

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I am getting NaN value from ifft (please guide)

1 month ago | 0

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

1 month ago | 0

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

1 month ago | 0

Acceleration to displacement data based on accelerometer

2 months ago | 0

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

2 months ago | 0