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How to collect output matrix from for loop
If you want to accumate over different matrices n = 10; A = zeros(3, 3) for i=1:n A = A + randi(5,3,3); end A If you ...

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Write a script file that will compute the sine of an angle using the Taylor series formula:
disp("Input the angle in degrees (x) and the number of terms (n)") %x = input('x: '); x = 45; %n = input('n: '); n = 100; ...

quasi 3 anni fa | 1

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how to normalize a uniformly distributed random values such that every row sum of X(:,:,i) should be 1 except for ith row?
n=6; key_size=3; i=5; X = rand([n,key_size,6]); idx = [1:i-1 i+1:n]; X (idx, :, :) = X (idx, :, :)./sum(X (idx, :, :), 2); ...

quasi 3 anni fa | 0

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Please Help Debug/ What are the errors?
t=-2:0.1:8; % define t first, since it is used next y=t.^3-6*t.^2+3*t+10; % need the element based operat...

quasi 3 anni fa | 0

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Count occurrences of categorical conjunction
Cat_one = categorical({'A'; 'B'; 'A'; 'D'; 'C'; 'B'; 'B'; 'A'; 'A'}); Cat_two = categorical({'X'; 'X'; 'Y'; 'Y'; 'Y'; 'X'; 'Y';...

quasi 3 anni fa | 1

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How to plot array with result of roots?
P=1:0.1:10; A=P; B=-(10+5*P); % 5*P not 5P C=3; D=-15; for i =1 : length(P) fv=[A(i) B(i) C D] v(i)=max(roots...

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What am I missing with plot? math is working fine, just need to plot it.
For ervery loop, you have only one point (x,y) which you can not plot as a line. Use plot(x, y, 'bo') to plot the point instead...

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sampling and FFT of a sinusoid signal
f0 = 50; fs = 250; t = (0:1/fs:(0.1-.5/fs)); % [0, 0.1) g = sin(2*pi*f0*t); plot(t, g); L = 512 Y = fft(g, L); % compute...

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Why the following code does not give me the 3D plot. Please someone help me out.
In your definition of R0, there is a term rho1+rho2, which happen to be 0. So R0 is just 0. Check your formula first.

quasi 3 anni fa | 1

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How to find standard deviation of all entries in a range and omit nan
A=rand(10); StdssA=std(A(2:4,3:7), 0, 'all', 'omitnan') % doc std

quasi 3 anni fa | 0

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How to reduce computation time with 8 nested for loop
Brute force searching for such problem is not feasible. If it takes around 10 days to reach to 10^13, it takes 10*10^11=10^12 d...

quasi 3 anni fa | 0

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Display value of a variable within ' '
system([stata_location ' -b do mydir/mydofile ' num2str(run_id)]);

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why is this happening? It's just an example from the textbook.
syms x f=@(x) x-3; r=solve(f, x)

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How to computer a frequency spectrum and find its largest spectral energy
fs = 10; tspan = [0:1/fs:100]; % specify the time points xint = [3.0;2.0;1.0]; [t,x]= ode45(@nonlin,tspan,xint); % remov...

quasi 3 anni fa | 0

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How to delete specific cells according to the condition from cell array?
If you want to keep the output as a cell array (as the input), you cannot delete them, but you can assign them to empty array. ...

quasi 3 anni fa | 1

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Finding the required number of high frequency values from histogram
a = [randn(10000,1)-5; randn(10000,1); randn(10000,1)+5]; histogram(a) [y,edges] = histcounts(a); % Use the center of edges...

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How to find out roll-off from magnitude response of filter in matlab
fs = 2000; [b,a] = butter(9,400/(fs/2)); [h, f] = freqz(b,a,16384,fs); h = 20*log10(abs(h)); [~, i3db] = min(abs(h - 10*log1...

quasi 3 anni fa | 0

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Finding location of specific element from a MATRIX returns '0×1 empty double column vector'
[i,j] = find(abs(a-23.5975)<1e-20)

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How to move a signal to be on the x-axis
try "detrend".

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String to number from array
You can use "readmatrix" function: % Generate the data file a = [290729 123456 13984 654321 13272 111111]; writem...

quasi 3 anni fa | 2

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How to efficiently compare large multi-dimensional arrays together of different dimensions?
M = 512; N = 512; O = 136; P = 6; % Generate random matrix A = rand(M, N, O, P); thres = rand(O, P); % Thresh...

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cross-correlation between a vector and and rows of a matrix
x = randn(40, 5); % better to make it column dominant order for speed y = circshift(x(:,1), 5); for i=1:size(x, 2) ...

quasi 3 anni fa | 0

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Should the filter frequency response contain magnitude greater than 3dB in magnitude?
if you have 10^-6 dB or lower, then the response is almost flat in amplitude. The design or something else is most likely wrong...

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Plotting Response of Discrete Signals
https://www.mathworks.com/matlabcentral/answers/1458259-plotting-a-response-of-the-following-system#answer_792534

quasi 3 anni fa | 0

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Error while plotting the polar plot
e = 0.5; thet = -60:1:60; theta = thet .*(pi/180); c = cos(theta); p = 4*(1-e^2).*(c.^2) + (2*e - 1)^2; % q = 2*(1-e*e).*...

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Plotting a Response of the Following system
% 𝑦[𝑛] = −𝑦[𝑛 − 1] + 5𝑥[𝑛] + 2𝑥[𝑛 − 3]. b = [5 0 0 2]; % 5x(n), 2x(n-3) a = [1 1]; % y(n) + y(n-1) % From an ...

quasi 3 anni fa | 1

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How do I refer to values that contain decimal points and integers (for example, 1.0000 ... and 1)?
a = b(cellfun(@(x) abs(x -1 ) <1e-10, b(:,1)),:);

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Question about how to put several values in one histogram
You should not use histogram. You should use bar: bar([3 4 3]) set(gca, 'XTickLabel', ["Player" "Computer" "Draw"])

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How to find rest of the number in matrix ?
a = 1:10; I = find(a>5) aa = a(I) bb = a; bb(I)=[]; bb

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who to write this function in another way?
fcn(-5) fcn(.34) fcn(4) function y = fcn(u) x0 = [-inf -0.9 -0.8 -0.6 -0.4 -0.2 0.2 0.4 0.6 0.8 0.9 1.5]; y...

quasi 3 anni fa | 0