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107 Threads found on Grid Matlab
I'm a beginner in FDTD programing. Anyone have a matlab code to solve the irregular grid problem?? THX
little matlab demo of fractional derivative..enjoy N=256; t=pi*/N; f=exp(-(t.^2)/(0.5)); f=f-mean(f); F=fftshift(fft(f)); figure(1);clf;set(gcf,'Renderer','zbuffer'); for n=0:0.1:4 Fn=(j*t).^n .* F; fn=ifft(fftshift(Fn));fn=fn/max(abs(fn));plot(real(fn)); text(20,1.0,sprintf('%0.2f',n)); grid on;axis( [0 2*N -1.
little matlab demo for fractional fft...enjoy N=64; t=2*pi/N*;c=1; for k=-N/2:N/2 B(c,:)=1/sqrt(N+1)*exp(-j*k*t);c=c+1;end; f=exp(-t.^2); f=f-min(f); f=f'; figure(1);clf;set(gcf,'Renderer','zbuffer'); for n=0:0.1:2.0 Bn=B^n;fn=abs(Bn*f);plot(fn,'b');hold on;plot(f,'r--');hold off; text(10,1.7,sprintf('%0.2f',n));
Hi, I think you may have a problem with that, since matlab hasn't 3D polar plot instruction. However I use a spherical triangular grid (either imported as ASCII from any 3D graphing tool, or generated manually) then use PATCH3 instruction to plot the triangles with the color being proportional to the radiation intensity (or gain in that dire
I do have a S(f) calculated and now I made a x-y coordinate system using this code subplot(2,2,1); semilogx(f,real(S11)); xlabel('Frequency'); ylabel('Real(S11)'); title('Real(S11) = Real(S22)'); grid; As a figure I get empty drawing so i'm interested how to plot the line for the S that i have calculated.What is the co
To begin with, congratulations for the forum! It is very nice! Btw, keep up the good work! As far as my issue is concerned, in few days I will start a project related to the connection of wind turbines to the grid (inductions or synchronous; it doesn't matter). I hope to manage to emphasize the impacts derived from that connection such as the vol
I'm facing problems trying to implement an algorithm i have been thinking in matlab... Here's what i want to do... I have a number of cells(say n cells) (or cities, or points or whatever). The cells are not all connected each other. Some cells are connected with some neighbor cells but no one else. I know the connections. What i want to do is t
/******************************************************************************/ /* MAIN_C /******************************************************************************/ #include #include "gridTree.h" /* THE grid |----------------------------------------------- | |
hi i ran your program in matlab 7 and it worked successfully. i think error belong to "angle" because it is one of matlab functions. use: r = 1.2; theta = 10*pi/180; ang = 0:theta:36*theta; mag = r.^(ang/theta); polar(ang,mag) grid title('Polar Plot')
there is an example x=0:10:1e6; semilogx(x,log10(x));grid;
I think you should first solve for I as a function of V. Then you can use that to write an expression in matlab. Once you get that expression and write I=f(V) then you are basically done. The following code (with an appropriate expression on the right hand side of I= ) should do it. V=; I= plot(V,I),grid
Dear all, This is a part of sigma-delta modulator code in matlab. tr = 1024*4; % points for transient pt = 1024*32; % FFT points tt = tr+pt; % total points osr = 64; % osr=64 fc = 20000; % signal bandwidth = 4k fs = 2*fc*osr; % sampling frequency
I have to solve sub grid(irregular) fdtd with matlab. I hope some one can upload this code. Please~~~~~~!!!
Hi all I've a question about ADC TEST. I received matlab code for logic analyzer's data in MAXIM Homepage. But I'm confused about that. In code... . . . figure; plot(,code); title('TIME DOMAIN') xlabel('SAMPLES'); ylabel('DIGITAL OUTPUT CODE'); Dout=code-(2^numbit-1)/2; %Re-center the digitized sinusoidal input Dout
Xc= 2; %Center for x Yc = 3; %Center for y R = 2; %This is the radius x=0:0.01:1; %x vector y=0:0.01:1; %y vector plot(Xc+R*cos(2*pi*x),Yc+R*sin(2*pi*y));%the circle plot grid
Your code is close but had a few errors. Here is the working code. close all; clear all; reg1 =0; reg2 =0; reg3 = 0; eta =sqrt(2)/2; theta =2*pi*1/100; Kp = ; Ki = ; d_phi_1 = 1/20; n_data = 100; for nn =1:n_data phi1= reg1 +d_phi_1; phi1_reg(nn) = phi1; s1 =exp
Hi all, I want to plot an i-v curve of this equation i=100*^2 by using matlab, but unfortunately it looks that the plot I get isn?t the one that I want, so I think there must be something wrong but I don?t know it. Your suggestions and comments will be highly appreciated! Here is my code: %current versus voltage cur
fs=50; fcut1=10; fcut2=5; w1=2*fcut1/fs; w2=2*fcut2/fs; =butter(2,w1); =butter(2,w2,'high'); =freqz(b,a,100,fs); =freqz(b1,a1,100,fs); kfr=abs(h); kfr1=abs(h1); subplot(2,1,1),plot(kfr);grid; subplot(2,1,2),plot(kfr1);grid;
In this example, we shall simulate the shapes of the electrocardiogram for both The following commands create an electrocardiogram signal heart might produce assuming a 4000 Hz sampling rate. The heart rate for this signal is approximately 89 beats per minute, and the peak voltage of the signal is 3.5 millivolts. x1 = 3.5*ecg(2700).'; y1 = s
my project is about FIR filter design by the FFT algorithm, I have some problem in writing code in matlab. if any body could help me I'll really be tankful. please copy paste this code in your matlab software(ver.7) & run it. f = ; m = ; h(:,1) = fir2(31,f,m) ; %time domain FIR filter plot(b); hold on plot(I,h(
x and z are RV of gaussiana distribution and not correlated, y is a RV of a gaussiana distribution and correlated with x n=2^13; x=randn(1,n)+3; z=randn(1,n)+4; y=zeros(1,n); m=50; for i =1:n-m y(i)=mean(x(i:i+m-1)); end plot(); grid The density function: =hist(x,50); fx=fx/sum(fx); =hist(y,50)
figure(1);plot(x,y);grid on; figure(2);polar(x,y);grid on;
Hi, Could some one please elaborate if it is possible to 'not' have the figure window show up before a jpeg file creation (using print -djpeg command)? If used in a loop, the plot command takes a long time in creating the window on every iteration on the screen, when all I really want is to create a jpeg file afterwards. Thanks, /Hunter
matlab provides the inbuilt function for QAM. Here is the code... just try over this Create a random digital message M = 16; % Alphabet size x = randint(5000,1,M); % Message signal % Use 16-QAM modulation. y = qammod(x,M); % Transmit signal through an AWGN channel. ynoisy = awgn(y,15,'measured'); % Create scatter plot from noisy d
Hi x: x(1:12)=0; x(13:17)=1; x(18:29)=0; n=-14:14; stem(n,x,'.'); grid; axis() For X(ejw): W=-2*pi:1e-4:2*pi; plot(W,sin(2.5*W)./sin(W/2));
Hi all I want to grid (FEM 2-D) a geometry that is bounded with a function (defined in a mfile) in matlab. in pde of matlab it is described with command "initmesh" but this command did not recognize my function. I want to know the user defined function must have what properties?
We can plot the magnitude/phase and mark the phase margin / gain margin of a system with following command phase (sys) But the defaust unit used in the plot is rad/sec. and the grid line is default off. 1. How to program to set the unit to Hz directly? 2. How to program to set the grid line is on?
hi see my code here (i attached this code many times) clc; clear all; disp('M-Array PSK Modulation') %create a random digital message M=input ('M= '); %alphabet size x=randint(input('Number of binary bit stream = '),1,M); %% %% nsample=40; %oversampling rate. %% %% %use M-PSK modulation to produce y y=modulate(modem.pskmod(M),x); %%
Hi dear see this (my program) clc; clear all; disp('M-Array PSK Modulation') %create a random digital message M=input ('M= '); %alphabet size x=randint(input('Number of binary bit stream = '),1,M); nsample=40; %oversampling rate. %% %% %use M-PSK modulation to produce y y=modulate(modem.pskmod(M),x); %% %follow with rectangular p
Hi experts, i have a quistion here, please read the following paragragh as it is in a pdf document on the web: The Fourier transform can be computed using the matlab code Fk = fft(fn)/N; % The FFT of the signal fn fn = ifft(Fk)*N; % The Inverse FFT ifft(fft(fn)); % This result = fn (within machine precision) We must divide by the number of
clc;clear all; %create a random digital message M=64; %alphabet size x=randint(100e3,1,M); %% %use 16-QAM modulation to produce y y=modulate(modem.qammod(M),x); %% %%transmit signal through an AWGN Channel ynoisy=awgn(y,27,'measured'); %% %Create scattet plot from noisy data scatterplot(ynoisy),grid; %% %Demodulate ynoisy to recover t
In a matlab code, i have to finde the symbol error rate of 32qam modulation with awgn and SNR from -30 to 30 and step 5. But the figure apears wrong. Can somebody tell me what i made wrong in the code??? clear N=10^4; M=32; for SNR=-30:5:30 x1=randint(1,N,M); y1=qammod(x1,M); for t=1:N awgn1 =awgn(y1,SNR,'measur
Yes matlab is the best tool for simulating antenna arrays; Below i have typed some matlab code to simulate liner antenna array. change the different variable and see the results. %******************************** clc clear all f=2000; c=340; d=.08; N=10; theta= 45 * (pi/180); si=0:pi/100:pi; for k=1:101 peak(k)=(sin(N*f*d*pi*(cos(
Here i hav written a small code to plot ur data, hope it will help clc clear all fid=fopen('C:\Documents and Settings\Zeeshan\Desktop\a.txt'); data=fread(fid,inf,'int16'); figure(1) plot(data(1:100)) grid on fclose(fid);
function askd(g,f) %Modulation ASK %Example: %askd(,2) objectId=14328&objectType=FILE if nargin >2 error('Too many input arguments') elseif nargin ==1 f=1; end if f<1; error('Frequency must be bigger than 1') end t=0:2*pi/99:2*pi; cp=;sp=; mod=;mod1=;bit=; for n=1:length(g); if g(n)==0;
Hi, I have a matlab code here it acquires FM modulated signal from sound card can perform FM demodulation however, i don't why it set vcok (VCO K constant) at 0.176 anyone can explain to me how and why it is set to 0.176? Fc = 2144; %select VCO carrier frequency vcok = 0.176; %select vco constant Fs = 40000; %select sound card sampl
The following program is not showin the frequency properly that is supposed to be got by fft. please help. clear all;clc;close all; fs=1e3; t=(0:fs)'/fs*10; f=30; x=sin(2*pi*f*t); xf=fft(x); plot(t,x); hold on plot(t,xf,'r'); grid on; axis tight; zoom on;
hello everybody... can i ask something... how ca i change this command to display the magnitude spectrum?? this command has show low pass filter.. case 1 if(wp>ws) handle=errordlg('wp must be less than ws for lowpass filter','guifilter_design'); return; end =buttord(wp,ws,rp,rs,
clc; clear all; disp('M-Array ASK Modulation') %create a random digital message M=input ('M= '); %alphabet size x=randint(input('Number of binary bit stream = '),1,M); nsample=40; %oversampling rate. %% %% %use M-ASK modulation to produce y y=modulate(modem.qammod(M),x); %% %follow with rectangular pulse shaping. ypulse=rectpulse(y,n
see this code for QAM, you can modify it as your request: clc;clear all; %create a random digital message M=64; %alphabet size x=randint(100e3,1,M); %% %use 16-QAM modulation to produce y y=modulate(modem.qammod(M),x); %% %%transmit signal through an AWGN Channel ynoisy=awgn(y,27,'measured'); %% %Create scattet plot from noisy data s
I need grid based clustering algorithm (code) for matlab (or C++).. I can't find it anywhere... Please help.. Something simple that works.. STING, WaveCluster, Clique, Optigrid or something else.. I'm writing a paper about grid based clustering and I need to attach code to show how it works.. If anyone knows, please (...)
I think the good point to start you is with the DC/DC converter control.... then move to Inverter Control and then grid synchronization.
this is the bpsk code i tried in matlab.. but no output... plz help... for j=1:7 eb1(j)=j; no=1; eb2(j)=10.^(eb1(j)/10); a=sqrt(eb2(j)/4); %s=; s1=; s2=; psi=; x=0; for i=1:10000 d=randint(i); if d==1 s=s1; else s=s2; end n=randn(1,4); n1=n*sqrt(no/2); r=s+n1; z
This is a program in matlab to do the DFT and the FFT (2-sided and 1-sided) Good luck %FFT lecture. clc;close all; clear all; %Generate the sine wave sequences fs=8000; % sampling rate N=1000; % Number of data points. x=2*sin(2000*pi*/fs) ; figure(1) ; stem( 1 : 1:N/10,x( 1 : 1 :N/10 ) ,'filled' ) ;%plot first 100 sample of x(n)
this is a simple code for M - PSK modulation try it, if you need other help, contact me or you can join our groups: and the second %adding a rectangular pulse shaping; clc; clear all;close all; disp('M-Array PSK Modulation')
Hello I m trying to estimate time delay between signals using cross correlations. Unfortunately I ve encountered a few problems I m unable to handle. Here is code what I ve done. According to article I ve read it is supposed to be working. I m expecting at the last figure, one peak which should indicate a delay between signals x1, and xr, but
I think you are right. I did a simulation for a CDMA system and i have faced the same problem. by the way: I changed the following lines: at the first I added clc; close all; clear all; the signal to noise ratio become SNR = 0:.2:20; % Range of SNR values, in dB. to make the figure more smoth. and the reset was canceled as
hi this is pradeep doing mtech in nit.i want matlab/simulink model for pv sytem.please send mdl file to my email
Please give me the description for the code below. This is based on baby cry detection. that is finding the pitch of the baby cry and controlling the cradle accordingly ******************************************************************* x=fft(double(y)); z=length(x); z1=int16(z/8000); z2=z1*150; z3=z1*200; z4=z1*900; m = abs(x(5:
Use the following code for creating a low pass filter : Determine the cut off frequency and change Fc appropriately Fc = 500 ; %cut off frequency w = Fc/(2*fs); % Normalized frequency %design a low pass fitler with above mentioned specifications =butter(5,w,'low'); %5th order butterworth LPF =freqz(b,a,1024); %Frequency response