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**Content Feed**

Rotate Basis Vectors Programmatically

V1 = orth(randn(6)) % your original orthonormal basis % Then you can apply any other orthonormal basis to it % For e...

19 minutes ago | 0

Sorting Values my Integer and Decimal Values

p = [8.1 8.2]; if floor(p(1)) == floor(p(2)) disp("A pair.") end f = [2.1 , 3.1 , 4.1, 5.1, 6.1]; if all(abs(diff(mo...

4 hours ago | 1

Correlate Signals with different time points

You can resample the data into sime sampling time: doc resample doc retime doc interp1 After both signals are sampled in the...

6 hours ago | 0

How to remove the AWGN noise from data?

Uo=[20 30 40 50]; % signal U=awgn(Uo,30) % add noise to signal % Uo=U-awgn(30); % if you don't know t...

6 hours ago | 0

How to trasform from cell to matrix and transpose from horizontal to vertical at the same time?

Data.my_cell{1} = randn(1, 11); Data.my_cell{2} = randn(1, 11); Data.my_cell{3} = randn(1, 11); Data.my_cell my_matrix = cel...

2 days ago | 1

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How do I zoom in on a certain section of a magnitude bode plot

num = [1]; den = [1 0.04946 3.00316 0.0989847 3.00322 0.0494631 1.00006]; g=tf(num, den) bode(g) grid on ax = findobj(gcf, ...

2 days ago | 0

Obtaining Sine Wave From Square Wave

% generate a square wave with no fixed period f = 0.125; fs=1; s = 0.3+sin(2*pi*f*(0:40)); % a sine wave with offset x =2* (...

2 days ago | 0

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why do I get this error while using qammod? "Expected input number 1, X, to be an array with all of the values < 4."

A few bugs in program. The major one is generating input signa which should bel: tx_bits=randi([0 M-1], [N_data_symbol,1]); N...

2 days ago | 1

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Using trapz function to provide answers using loop

% The way to use trapz x= 1:20; % x y = randn(20, 1); % y ytrapz = trapz(x, y) % integr...

2 days ago | 0

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Storing sparse matrices in cell or struct without converting them to full

The sparse array in cell is still sparse array as shown below, Can you show the problem you have encountered? a = sparse(eye(1...

2 days ago | 0

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How to import exponent number from Excel column to MATLAB

x = readtable("2powx.xlsx") y = cellfun(@(a) sscanf(a, "%d^%d")', x.LSB, "UniformOutput", false) y = cell2mat(y) y = y(:, 1)....

3 days ago | 0

How to fit a gaussian distribution curve on a bar diagram?

p = [1/36,2/36,3/36,4/36,5/36,6/36,5/36,4/36,3/36,2/36,1/36]; xsum =[2,3,4,5,6,7,8,9,10,11,12] ; bar(xsum, p) mu = sum(p.*xsu...

3 days ago | 0

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Why do I get error when using a simple global variable?

Not sure what the code is trying to do. However, the error is due to the wrong usage of ( ) rather than global variables. glob...

3 days ago | 1

How can I plot direction of principal components in PCA

x = randn(4, 2); plot(x(:,1), x(:,2), 'ro', 'DisplayName', 'data'); axis equal; hold on p = pca(x); xc = mean(x); quiver(x...

3 days ago | 0

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Smoothing data with sgolay filter

framelen = 11; order = 3; % adjust these values smootheddata = sgolayfilt(z, order, framelen);

3 days ago | 0

Unrecognized function or variable 'sum'.

classdef question2 methods function q2a = l1qa(~,table) % clear sum; s...

3 days ago | 0

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I have a 2x2 matrix with values [0.5694 -0.8220; -0.8220 -0.5694] How do I plot this matrix?

x = [0.5694 -0.8220; -0.8220 -0.5694] heatmap(x); figure plot(x(:, 1), x(:,2)) % take 1st column as x and 2nd column as y (...

3 days ago | 0

Get the displacement component which is perpendicular to the triangle (finite element)

% In order to know the normal of triangle, you need the coordinated of % triangle postri = randn(3, 3) % x y z v = dif...

3 days ago | 0

Separating a timestamp into individual components

times = [ 20082009 21082009 22082009 23082009]; d = floor(times/1e6); m = mod(floor(times/...

3 days ago | 0

Suppress Window using System Command

cd("C:\Program Files\Bentley\Offshore\MAXSURF CONNECT Edition V23") cmd = "MaxsurfModeler64.exe display off" system(cmd)

3 days ago | 0

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plot graphs with a range

R = 2.303 * 8.314; T = 273 + 20; F = 96500; Eqv = @(z, Xout, Xin) ((R * T) / (z * F)) * log(Xout/Xin); fprintf("<Question 1:...

3 days ago | 0

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Scatter plot with mean for multiple groups

x = readtable("https://www.mathworks.com/matlabcentral/answers/uploaded_files/1136975/MATLAB_exampledata.xlsx"); x.Group = cate...

3 days ago | 0

Find the first value that is greater than or equal to and its corresponding value

data =[ 0.01 3 0.02 4 0.03 6 0.04 9 0.05 12 0.06 14 0.07 15 0.08 18]; idx = find(dat...

3 days ago | 0

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How can I insert many columns into a matrix at different locations efficiently?

%Create some "data" A = rand(100); %some random data col = randsample(100,15); A(:, col)=zeros(100,15); %some random columns ...

3 days ago | 0

I am not sure why my function is undefined for input arguments double.

x = rand([-20 20]); % generate random number in range [-20 20] % call the function % output function_name input_argume...

4 days ago | 0

How to get the intensity value of the flower

im = imread("https://www.mathworks.com/matlabcentral/answers/uploaded_files/1136290/image.jpeg"); whos im = rgb2gray(im); ...

4 days ago | 0

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How to convert a sym variable to an ordinary variable?

t= linspace(-1,3); syms x_t(t); x_2(t) = piecewise(t<-1,(2),-1<t<=-.5,(t.*4+6),-.5<t<2, (-2.4*t+3),t==2,(2),t>=2, (2)); y ...

4 days ago | 0

how can I plot a trajectory of moving point ?

npts=1; v=28.8/3.6; radius=1000; center=[0 0]; MOVE(npts, v, radius, center) function MOVE(npts, v, radius, center) d...

4 days ago | 0

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can anyone help me ? i keep getting this error

num_roots=5; num_functions=6; %initial guess for roots (from Wolfram MathWorld) zeros_guess=[2.4,3.8,5.1,6,7.5,8.7;... 5.5...

4 days ago | 0

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Use a grid/image get positional inputs and measure time in-between clicks.

You can make your function based on ginput or getpts. Edit one of these matlab functions and add the output argument of t and r...

4 days ago | 0

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