Question

approach to solve coupled differential equiations

to whom it may concern, I was wondering how to approach these coupled differential equations numerically using matlab. Note tha...

4 years ago | 1 answer | 0

Question

change from frequency to time domain

%%%hello every one so here is my code in solving the NLSE(Non Linear Schrödinger Equation) using Split Step Fourier Method w...

6 years ago | 0 answers | 0

Question

how to add a signal?

so this is my small code on solving the nonlinear schrodinger equation , when you run the program you will get some graphs my ...

6 years ago | 1 answer | 0

Question

changing to wavelength domain

% hello everyone i have a question : in my small code here, I drawn a Fourier transform function from time to frequency domain...

6 years ago | 0 answers | 0

Question

getting the error please help

b4=0.1:0.001:1; B=(20.*abs(b4))/3; F1=(6/abs(b4)).*(sqrt(10^(-2)+B)+10^(-1)); F2=(6/abs(b4)).*(sqrt(10^(-4)+B)+10^...

6 years ago | 1 answer | 0

Question

i want to draw 10 lines from x =0 till x=10 in 3d i tried but i wouldnt get my result any thoughts??

x=0:1:10; y=0:1:10; z=0:1:10; for j=0:1:10 for i=0:1:10 x=x+i; end plot3(x,y,z) end

6 years ago | 2 answers | 0

Question

i need to plot in 3d the freuquency domain of a gaussian pulse please someone tell me how to do it this is so far what i could do i did it in 2d but my purpose is in 3d???any one???

t=-10:0.1:10; C=0; t0=1; T=t/t0; A=1+(1i.*C); fymax=1i; B=T.^2; ut=exp((-0.5.*A.*B)+(z*1i*exp(-A.*B))); ...

6 years ago | 0 answers | 0

Question

to save time the mistake is in this line how can i solve it

omega=(pi/tmax)*(0:nt/2-1) (-nt/2:-1); the error is said: Unbalanced or unexpected parenthesis or bracket.how can i solve ...

6 years ago | 1 answer | 0

Question

how to plot the signal maintained in frequency domain in 3d i tried but as you can see its not what i want :(

t=-10:0.1:10; C=0; t0=1; T=t/t0; A=1+(1i.*C); fymax=4.5.*pi; B=T.^2; ut=exp((-0.5.*A.*B)+(4.5i*pi*exp(-A....

6 years ago | 2 answers | 0

Question

i tried to fix the problem i didnt know how :( please help

clear all; distance=15; beta2=1; N=1; mshape=input('m=0 for seech, m>0 for super-gaussian= '); chirp0=0; nt=...

6 years ago | 0 answers | 0

Question

fix the mistake line 91 function

% This program simulates a single-channel fiber transmission link % using the symmetrized split-step Fourier algorithm. ...

6 years ago | 1 answer | 0

Question

i copied it from the book i know the error is in the omega definition(line 12) but i dont know how to solve it please help

clear all; distance=15; beta2=1; N=1; mshape=input('m=0 for seech, m>0 for super-gaussian= '); chirp0=0; nt=...

6 years ago | 1 answer | 0

Question

i dont know why the second figure is empty

fs=20; Ts=1/fs; N=1024 Tmax=(N-1)*Ts; t=-10:Ts:10; ut=exp(-(t/10).^2); plot(t,ut.^2) f=-5:fs:5; z=ffts...

6 years ago | 1 answer | 0

Question

Is it possible to solve the following ???

Hello everyone I need to ask a tough question I have an integral I should plot in 3d from minus infinite to plus infinite it is ...

6 years ago | 1 answer | 0