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Sanaa
Posts:
154
Registered:
3/20/12


Re: problem with cumtrapz
Posted:
Dec 8, 2012 1:09 PM


I am sorry for the miss forming of the code. Please see this % define the vector of colors, to plot the data of reach value of r in % different color color_vec = ['b']; r=0.05; for rho = 0: 0.001:10 % define the number of discrete times in interval [k*r, (k+1)*r] n = 50; % define the number of iterations k = 1,.....,Nit Nit = 150; % define the initial vector which is a vector of size n x0 = 0.3*ones(1,n); % define vectors x_next and x_previous x_next = zeros(1,n); %x_(n+1) x_previous = zeros(1,n); %x_n time = zeros(1,n); % initialize x_previous x_previous = x0; x_next = x_previous; hold on for i = 1:Nit time = linspace(i*r,(i+1)*r,Nit); y_next=rho.*x_previous.*(1x_previous); x_next = x_previous+ cumtrapz(y_next); x_previous = x_next; end end plot(rho,x_next(1),'.', 'Color', char(color_vec)) Now I have only one point in the plot!! I also want to integrate from n*r to t!? Any help please. thanks a lot in advance



