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Programming in MATLAB applied to interdisciplinary engineering fields

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How to get Fourier transform of rectangular window as shown by wvtool function?. Why frequency domain of rectwin(M) using fft and wvtool are different?
_By default, the frequency domain plot is the magnitude squared of the Fourier transform of the window vector in decibels (dB)_ ...

約16時間前 | 0

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Dot Product of row vectors using loops not functions
result = dot(a1,a2) Why do you need a for loop ?

約17時間前 | 0

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Make scalar data into a vector
for i=1:length(x) a(i)=round(-19.93984628*x(i).^2-19.26822854*x(i)+28.63259561); %Use inverse matrix to form system ...

約19時間前 | 0

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Code not working?
clear; clc; % Given data E_f = 228000; % Elastic modulus of the fiber E_m = 1325; % Elastic modulus of the matrix G_f = 15...

約24時間前 | 1

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Unable to plot transfer function properly by using step(tf,array)
sys = tf(4,[1 2 10]); tt=0:0.0074:0.3; step(sys,tt)

1日前 | 0

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where is the mistake?
while count<15 if strcmp(w(count),'r') disp('yes') count=count+1; else break;% this will ...

1日前 | 0

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i have a function and i need to find the output of the last value. y(n)=1/2*(y(n-1)+A^2/y(n-1)) 0<=n<=N-1 (N=30 A=4),When i run it says output arguments not assignet.
function res = my_matlab_function(A,N) % res is te function output y(1)=1/2*(3+(A^2/3)); y(2)=1/2*(y(1)+(A^2/y(1))); for n...

1日前 | 0

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I have written the code for three differential equations for plotting the graph . I am not able to get the graph .
clc; clear all; close all; F = @(Z,X,Y) (1.07*Z*Z-Z*Z*Z-0.17*Z-(0.36*Z*X)-(0.0001*sqrt(Z*Y))/(1+0.2*sqrt(Z))) A = @(X,Y,Z)...

1日前 | 0

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Implicit matrix expansion correction
a = rand(11,21); b = rand(21,1); c = 21 a = reshape(a(a~=b.'),[],c) There is no error with your code. Maybe it's version...

2日前 | 0

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Nothing shows up on plot?
MM = 24; days = 1;i =1;% set value to counter while MM > 0 m(i) = MM; MM = MM - randi(5); MM = MM - 7; ...

2日前 | 0

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Ode45 not working in matlab 2021b
zdot=inline('[z(2);-0.2*z(2)-sin(z(1))]','t','z') Check your zdot function. There is no variable with _t_ defined in it...

3日前 | 0

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How can I remove some specific lines from this contour plot
Easy way is that you can select "Edit" option from the figure window after plotting and click on figure properties. Then click o...

3日前 | 1

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Reading all values as a string from excel file
Use readtable or readmatrix instead of xlsread

3日前 | 0

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TASK 5 PROBLEM SIMULINK ONRAMP
Set the initial condition source to external and try

4日前 | 0

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Simulink Onramp 13.1 Task 5
Set the initial condition source to external from drop down menu.

4日前 | 0

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Matlab recommends me to apply 'subs' command but I have already used it to convert a symbolic matrix into a numerical one. What fails?
A_final=vpa(A_num,3); Check with _vpa_ instead of _double_

4日前 | 0

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Error when indexing 3D cell array: Index in position 2 exceeds array bounds
N = block_size*ceil(numel(participants{i,2})/block_size); Try changing this line to above. It seems you are using _numel_ f...

4日前 | 0

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How Do I Properly Format my Bar Graph?
x = [379.5 , 1138.3 , 1897.2 , 2656]; % your values y = rand(size(x)); bar(x, y) xlabel('Number in the Thousands (ie 4,000)'...

5日前 | 1

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Getting a blank graph
syms theta1 grid on w2 = @(theta1) ((cos(pi/6)*(sec(theta1)).^2)./ ((tan(theta1)).^2+(cos(pi/6)).^2))*2*pi; theta1 = 0:pi...

6日前 | 0

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why do I keep getting this error message
t = 0:1/320:0.5; x = @(t) 6*cos(4*pi*t)+2*sin(16*pi*t) -4*sin(32*pi*t);% define anonymous function x(t) plot(x(t))

6日前 | 0

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Plotting with dsolve for ODE
clear clc [x,y] = meshgrid(-5:0.4:5,-5:0.4:5); dydx = x.^2+y.^2-1; L = sqrt(1+dydx.^2); quiver(x,y,1./L,dydx./L,'k') hold...

7日前 | 0

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Hi COMM, How can I hold only one plot while updating the rest in a figure ? E.g. I want to keep (x,f) plot fixed , while keeping the current value for the animated plot
for k=1:length(x) plot(x(1:k),f(1:k),'or') axis([SSmin SSmax 0 30]) pause(2) end Check with this

7日前 | 0

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the for loop is only giving me the last value
North_20170401 = zeros(360,6); N_Y_K_20170401 = zeros(360,6); for i = 9 :15 : 359 %for j = 1:1:24 disp( Data_2...

8日前 | 0

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matlab 'colorbar' error
This syntax does not seem to be supported in Matlab axis('ij') See what you get if you change it to axis ij

8日前 | 0

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Error in using diff for derivative
t = f(a); while (true) if (gradient(t) ~= 0) b = a - t./gradient(t); if (abs(b-a) <= error) ...

8日前 | 0

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How ro divide a scalar by a excel data and plot the result?
X= 51./data(:,4); Use the element wise division operator

9日前 | 0

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add new row to table with missing values
V.name = "Ann"; V.city = "Berlin"; V.age = 24; V.height = 172; T1 = struct2table(V); V2.name = "Luka"; V2.city = "Tokyo"...

9日前 | 0

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How do I extract a vector from a single field in a structured variable?
folder_names = struct('name',['MH';'TM';'JW']) participant_ID = folder_names.name Check with this

9日前 | 0

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How can ı solve invalid indexing or function
clc; clear all; syms nw W x Q(x) Y Qo ode1=diff(Q,x)== -nw*W*Y; cond1 = Q(0)== 0; cozum1(x)=dsolve(ode1,cond1); cozum1=s...

10日前 | 0

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Index exceeds the number of array elements. Index must not exceed 1.
z(i+1)=z(i)+(1/6*(k1_hiz(i)+2*k2_hiz(i)+2*k3_hiz(i)+k4_hiz(i))); v(i+1)=v(i)+(1/6*(k1_ivme(i)+2*k2_ivme(i)+2*k3_ivm...

10日前 | 1

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