How to draw same size rectangle on different image location
Try to adjust this protocol to your problem : L=0.5; N=100; for n=1:N p=randn; p2=randn; r=p+L; r2=p2+L...

9 years 前 | 1

variance equation of a white noise
you can program E or use *var* function, %var(x,0) %var(x,1)

9 years 前 | 0

How to add noise to rect fuction (rectangle) ?
The solution exists for one dimensional function, when you apply the function, you obtain a logical array, you need to convert i...

9 years 前 | 0

how to make fft2 surf plot with z axis in dB?
This problem does not occur with the following test : H=exp(-randn(10).^2); F=abs(fftshift(fft2(H,200,200))); F=F/m...

9 years 前 | 0

Sine wave changing amplitude
Nuchto, That is the amplitude modulation, it is possible to simulate that type of signals: x=real(exp(j*2*pi*(0:0.1:10))); ...

9 years 前 | 0

How from uint8 to 0 and 1?
rgb2gray(im2double(X));

9 years 前 | 0

Draw a polar plot from cartesian plot of gain function
In the code, v is not defined, i assume is it omegat, try : figure; polar(omegat,abs(gainfunction)); % 20*log10(abs(gain...

9 years 前 | 0

Question about coordinate system in matlab
You can start inspecting the x,y values in sample, to get an idea try : >>imshow('circuit.tif') Then go to *Tools* in men...

9 years 前 | 0

Help generating a triangle using arrays, rotating triangle
Colin, you can try using the function *line* as the following : x1=[0 2]; y1=[0 0]; x2=[0 0]; y2=[0 1]; x3=[0 2]; ...

9 years 前 | 0

How do you plot a surface in matlab?
There several tutorials that illustrate how to make a graph of f(x,y), here is simple example : [x,y]=meshgrid(-1:0.1:1); ...

9 years 前 | 0

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Matrix for double pendulum not populating last column
This problem is sensitive to initial conditions, you can start by checking the equations, or values given to variables. In funct...

9 years 前 | 0

i want to find angle between two 3d dots in kinect skeleton
try to verify these relations : r=sqrt(x^2+y^2+z^2); phi=acos(z/r); % radian theta=acos(x/(r*cos(phi)); radian ...

9 years 前 | 0

compute the 2 dimensional (x,y) with respect to time
As long as there are three variables, you need to use : plot3(t,x,y); %.....

9 years 前 | 0

Lorentz poles in complex plane
Generating n peaks in complex using nth version of Lorentz function.

9 years 前 | 1 次下载 |

Replace jth zero in vector with j
try : x = [1 0 2 4 -3 0 3 0]; y=x; [a,b]=find(x==0); y(b)=b;

9 years 前 | 0

Soundsc and sound not Playing anything
It can be the range of the vector, try *sound(y/max(y),Fs)*.

9 years 前 | 0

Sir i am getting error :function isgray has been removed. Please suggest me which version of matlab i should use.
I think this function test an image of it is gray scale image, try to use an alternative way, using always logical answer, The g...

9 years 前 | 0

how to generate three independent sinusoidal signal in matlab?
sin waves with different frequencies : Fs=20; f1=2; f2=4; f3=9; t=0:1/Fs:10-1/Fs; y1=sin(2*pi*f1*t); y2=sin(2*pi...

9 years 前 | 0

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Vector convergence in cartesian coordinates
There are 24 undefined variables *C1;G0;hMaz;hMpol;Alpha;theta;phi;EAj;EAi;EAk;Ku;Vol;P;C2;Is;P_hbar;P_Q;Ms;Nx;Nz;Ny;hx;hy;hz;*...

9 years 前 | 0

A script that writes all even numbers from 1 to 100
Here is a beginning using while, : N=100; n=1; c=1; while n<N if mod(n,2)==0 E(c)=n;c=c+1; end n=n+1; en...

9 years 前 | 0

Frequency time graph.
Three dimensional graph to represent one dimensional sine waves

9 years 前 | 1 次下载 |

Replacing part of a matrix with a matrix
you can try : A(1:2,1:2)=0;

9 years 前 | 2

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What exactly is the "n-point DFT" that fft() computes?
N is the number of points used to calculate the fft, it does not increase physical resolution but adds more point to the spectru...

9 years 前 | 0

General Question of Matlab.
Maybe you need to to understand the structure of the problem before trying to solving as program, or you try to understand the p...

9 years 前 | 0

It is correct, you just need to exchange pdf with X : plot(x,pdf);

9 years 前 | 1

How to generate a discrete square pulse, lets say N times?
You can either write the function or use built-in function, here is an example using 1000 samples : N=1e+3; Fs...

9 years 前 | 0

Problems with snr function
Generally the formula is SNR=20log10(std(signal)/std(noise)) , in your case you have : snr=20*log10(std(xn)/std(ns...

9 years 前 | 0

convert number to string but keep it the same as it is
You can achieve that command using transformation from matrix to cells, if M is your matrix : M=magic(10); N=siz...

9 years 前 | 0

Plotting 2-variable Function with integration using MatLab
The problem is in the function *int*, it is designed for symbolic calculation while your work with numerical one, if you have th...

9 years 前 | 0