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findingsanaa (150) 70 Articles, 80 Replies, 150 Points

Since 5/31/2012 12:54:34 AM, findingsanaa has written 70 articles and participated in 80 conversations.
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findingsanaa

findingsanaa's articles:
 Items(70) /7 Next >> Last >| PECE method demo 3 13 (8/24/2013 4:27:08 PM) comp.soft-sys.matlabHi all, I downloaded PECE method matlab code written by Roberto Garrappa for solving nonlinear fractional order differential equations. I tried to implement the code several times but I failed. Is there any...Sanaa The entries in tspan must strictly increase or decrease 1 20 (8/22/2013 7:48:06 PM) comp.soft-sys.matlabHi all, I have 4 m files to create a plot and I define tspan = [0:tstep:tend]; Matlab gives me the error ??? Error using ==> funfun\private\odearguments The entries in tspan must strictly increase or decr...Sanaa Defining a fractional order differential equation in Matlab #2 0 22 (8/20/2013 2:20:35 PM) comp.soft-sys.matlabHi all, How to define a fractional order differential equation in matlab. I don't want to solve it but I just need to pass it to matlab. Thanks a lot in advance. ...Sanaa Defining a fractional order differential equation in Matlab 0 46 (8/20/2013 2:20:25 PM) comp.soft-sys.matlabHi, In the Matlab code written by Ivo Pertas for solving nonlinear fractional order differential equations in matlab (using fde12) I have to define my function which is a system of FODES for example, D^alpha...Sanaa Index out of bounds #8 3 7 (8/14/2013 8:46:08 PM) comp.soft-sys.matlabHi all, Can anyone please help me fixing the error I get when running the code given in three m files? Main code: clear M = [1 0 0 0 1 0 0 0 1]; x0=[-0.5; 0.2; 0.5]; options = odese...Sanaa One or more output arguments not assigned during call #2 11 26 (8/11/2013 2:46:11 PM) comp.soft-sys.matlabHi all, I have a problem when plotting the bifurcation diagram of the fractional-order duffing equation my code for that is function [T, Y]=FODuffing(parameters, orders, TSim, Y0) h=0.01; % number of calcu...Sanaa Calculating the absolute error 5 20 (7/31/2013 3:28:14 PM) comp.soft-sys.matlabHi all I have tow types of equations, the first is 3 fractional-order differential equations and the second is a 3 difference equations. I got the solutions for both of them; x, y and z How to calculate the a...Sanaa Integration with variable limits 17 16 (7/25/2013 2:09:14 PM) comp.soft-sys.matlabHi all, How to integrate a function within a loop and the limits of integration are variables? For instance, y(i)*(1-y(i)) is the function I wish to integrate from 0.25*i to t where t \in (0.25*i, 0.25*(i+1...Sanaa integration code error 0 7 (7/22/2013 3:55:13 PM) comp.soft-sys.matlabHi, I am integrating a function y (i)*(1-y(i)) from i*r to (i+1)*r but I get an error Function 'int' is not defined for values of class 'double'. My code is itermax=300;min=itermax-9;% That is we plot f...Sanaa Incomplete diagram! 2 15 (7/12/2013 12:32:20 PM) comp.soft-sys.matlabHi, I have a problem that I wish to plot what is called a bifurcation diagram. The map under study is given by x_((n+1)r)= 1 - ru *x^2_(nr), where r is a positive constant may take 0.1,0.2,... ru is a p...Sanaa

findingsanaa's replies:
 Items(35) /4 Next >> Last >| plot problem #13 6 22 (11/27/2012 7:35:18 PM) comp.soft-sys.matlabHi, I am plotting the bifurcation diagram of the map x(i+1)=x(i)+(t-i*0.05)*rho*x(i-3)*(1-x(i-2)); but matlab says ??? In an assignment A(I) = B, the number of elements in B and I must be the same. Pl...findingsanaa (150) How to integrate discrete function? 2 34 (12/4/2012 7:10:12 PM) comp.soft-sys.matlabHello, I want to integrate the discrete function a*x_n*(1-x_n) from nr to t (take r=0.005) where a:0:0.001:4 and n=0,1,2,3,...., and t\in[nr,(n+1) r] Any idea please? Thanks a lot. ...findingsanaa (150) problem with cumtrapz 3 24 (12/7/2012 5:51:08 PM) comp.soft-sys.matlabHi, I want to integrate the discrete function a*x_n*(1-x_n) from nr to t (take r=0.005) > > where a:0:0.001:4 and n=0,1,2,3,...., and t\in[nr,(n+1) r] I have tried the follwoing % define the vector of color...findingsanaa (150) why I am not getting a bifurcation diagram? 3 15 (2/20/2013 12:20:09 PM) comp.soft-sys.matlabHi, I am trying to plot a bifurcation diagram for Rossler discrete-time system. What's wrong in my code? I am only getting a line!!!! itermax=300;min=itermax-9;% That is we plot from 291:300 i.e. 10 v...findingsanaa (150) Incomplete diagram! 2 15 (7/12/2013 12:32:20 PM) comp.soft-sys.matlabHi, I have a problem that I wish to plot what is called a bifurcation diagram. The map under study is given by x_((n+1)r)= 1 - ru *x^2_(nr), where r is a positive constant may take 0.1,0.2,... ru is a p...findingsanaa (150) Integration with variable limits 17 16 (7/25/2013 2:09:14 PM) comp.soft-sys.matlabHi all, How to integrate a function within a loop and the limits of integration are variables? For instance, y(i)*(1-y(i)) is the function I wish to integrate from 0.25*i to t where t \in (0.25*i, 0.25*(i+1...findingsanaa (150) Calculating the absolute error 5 20 (7/31/2013 3:28:14 PM) comp.soft-sys.matlabHi all I have tow types of equations, the first is 3 fractional-order differential equations and the second is a 3 difference equations. I got the solutions for both of them; x, y and z How to calculate the a...findingsanaa (150) One or more output arguments not assigned during call #2 11 26 (8/11/2013 2:46:11 PM) comp.soft-sys.matlabHi all, I have a problem when plotting the bifurcation diagram of the fractional-order duffing equation my code for that is function [T, Y]=FODuffing(parameters, orders, TSim, Y0) h=0.01; % number of calcu...findingsanaa (150) Index out of bounds #8 3 7 (8/14/2013 8:46:08 PM) comp.soft-sys.matlabHi all, Can anyone please help me fixing the error I get when running the code given in three m files? Main code: clear M = [1 0 0 0 1 0 0 0 1]; x0=[-0.5; 0.2; 0.5]; options = odese...findingsanaa (150) PECE method demo 3 13 (8/24/2013 4:27:08 PM) comp.soft-sys.matlabHi all, I downloaded PECE method matlab code written by Roberto Garrappa for solving nonlinear fractional order differential equations. I tried to implement the code several times but I failed. Is there any...findingsanaa (150)