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How to determine the magnetic field in a round circuit using biot-savart law
The magnetic field *B(r)* is perpendicular to the the circle, hence it depends on the altitude z, but suppose that we want to ev...

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How can I add the arrow to the graph like this picture ?
Nguyen, That is thermodynamic cycle, there might be a solution, however try this temporary example : X=[2 4 4 2 2]; Y=[2 ...

대략 12년 전 | 1

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How to Plot the discrete Fourier transform on an image ?
%a I=I=im2double(imread('circuit.tif')); %b F=fftshift(fft2(I)); % surface(abs(F)) %c plot(abs(F)) ...

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how to find fourier transformation in intensity values
engineer 01, If you have one dimensional signal, you can use *fft(signal,N)* with N being the number of points for evaluating...

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How to Make a function accept vector inputs
You did not specify how the output should be , 1x1 or Nx1 , you can try this way : function Ml = myseries(t) n=0; ctr=1;...

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how to use Arrays for plotting curves in for loop
kiran, that can be done efficiently if you store all the ys in one matrix : t=0:0.1:6; y=zeros(length(t),3); y(:,1)=sin...

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Find angle between dots
hi, Computing the angle require the scalar product between the points, so you need to know the coordinate of the white dots, he...

대략 12년 전 | 0

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Surface plot of PDE numeric solution
Danila, I tried to examine you solution, the first thing is that r0,r1,r2 and r3 are not provided , plus a variable mu is not d...

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ground motion velocity in matlab
if you have the acceleration vector , you can integrate it to get the velocity, here is a simple example : t=0:0.1:2; % tim...

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on the image window output shows repeatation of image
hi, The code you provided is working correctly, but you did not exploit the matrix operations effectively, here is simpler ve...

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issue in matrix multiplication
G is 4x12 and m is 1x4, then two possibilities : m*G G'*m' You do not get binary result because of the multiplication c...

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Taylor series method for 2 coupled ODEs and I'm confused!!!
Jesse, i think you should add the index to the two solutions, try : h = 0.01; x1 = 2.37; x2 = -3.48; t = -1; for i=...

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Designing a lowpass filter in matlab
there is a filter design functions , you can start with the simplest function as follows : % given you sampling frequen...

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Why isn't array division commutative?
Andre, you mean that a1 and a2 are linearly dependent? then you divide a2 by a1 you obtain a matrix , the diagonal of that matr...

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compute the ideal impulse
try this function : function F = ideallp(wc,N); t = (N-1)/2; x = [0: (N-1)]; m = x - t + e...

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power spectral density PSD?
You can try this way : t=linspace(0,1,33);% 1 seconde Fs=inv(t(3)-t(2)); f=Fs/10; P=13; % number of signals X=zeros(33,P...

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can anyone demo me how to do a tamper localization?
hi, That is new field to me, let us try to apply what @Image Analyst described as an example : X=im2double(imread('circu...

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find values around a given row value
you can use minimum absolute value as the following : % data generation p1=2.5;p2=2.35; A=ones(600,2); A(:,1)=A(:,1)*p...

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Numerical integral calculation on GPU
hi, there are functions that are open source, letting the author to edit them, others are built in like fft as example. The int...

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Creating user defined variables and solving systems with a script
Use input: K=input(' Enter matrix :\n'); % You enter the K(i,j) as :[4 5 8 7;2 3 6 5] then K is the entered matrix

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please help>>>how to fix (Matrix dimensions must agree.) error in matlab?
hi Asma, the number of columns of WindowI must be the same as the number of lines in WindowH, take the two blocks with same d...

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Convert Image Sequence to Video
you can simply try : fileNames = dir(fullfile('C:\...\Cell Images','*.jpg')); N = length(fileNames); for k = 1:N ...

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FFT, Periodogram difference, Power Spectral Density Representation and Effect of Hilbert Trasnform to PSD
hans, If you are treating narrow band signals then FFT or pwelch as said by Andrew is sufficient, but for wideband signals, you...

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Two-side spectrum in Matlab
You can start by many tutorials, each offers a different approach to the DFT problem, in terms of resolution and amplitude estim...

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Matrix transformstion need help
Matrix transformation depends on size, if you are working on two dimensional space, then vectors X,Y must be 2x1 : here is an e...

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how to add white noise to signal
hi, Azzi mentioned a good point about the seed and about the signals noise, for this its better to work with signal to noise ra...

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Simple question, How to find one variable from a equation.
hi,are all the variables defined, because d1 d2 are missing , if you find d1 or d2 then v can be found by two ways : POL=[...

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How can I calculate the mean of a particular number of video frames?
hi, if it is grayscale Video then : [m,n,p]=size(X); MEAN=zeros(1,p); for x=1:p MEAN(x)=mean(X(:,:,x)); end ...

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Function for summing an infinite series using for-end loops
Chris, You can start by differentiating between names of input and output variables , then only S is your output : funct...

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How can I determine what matrix is needed to flip an image upside down?
Generally that type of matrices are for euclidean space where a vector or a set of vector can be rotated with a cos and sin rota...

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