# Help with this matlab program

Started by May 14, 2003
 Hi I am trying to generate a gaussian monocycle using matlab. And i have the formula for that but the program gives me an error that "Subscript indices must either be real positive integers or logicals" for t=0.1e-9:0.01e-9:1e-9 s-9/7; a(t)=(1-(t/s-3.5)^2); b(t)=exp(-0.5*(t/s-3.5)^2); p(t)=a(t)*b(t) end plot (t,p) Please help me with this program. Thank you, Jay Shah
 Hi! Jay, When you write a(t) (or b(t) or p(t)) on left side of your assignment statement, it takes that as an array. And index for array cannot be a floating number, while t in this case is floating number... Change the program as follows and it will work. ==================================== k = 0; for t=0.1e-9:0.01e-9:1e-9 s-9/7; k = k+1; a(k) = (1-(t/s-3.5)^2); b(k) = exp(-0.5*(t/s-3.5)^2); p(k) = a(t)*b(t) end plot (t,p) ==================================== Regards, Kaushik. --- mailtojayatus <> wrote: > Hi > > I am trying to generate a gaussian monocycle using > matlab. And i have > the formula for that but the program gives me an > error that > "Subscript indices must either be real positive > integers or logicals" > > for t=0.1e-9:0.01e-9:1e-9 > s-9/7; > a(t)=(1-(t/s-3.5)^2); > b(t)=exp(-0.5*(t/s-3.5)^2); > p(t)=a(t)*b(t) > end > plot (t,p) > > Please help me with this program. > > Thank you, > > Jay Shah > __________________________________
 >From: "mailtojayatus" <> >To: >Subject: [matlab] Help with this matlab program >Date: Wed, 14 May 2003 14:15:34 -0000 > >Hi > >I am trying to generate a gaussian monocycle using matlab. And i have >the formula for that but the program gives me an error that >"Subscript indices must either be real positive integers or logicals" Dear Jay Shah You confused the indices with the value that you need for your calculs it very easy to do it in other way, like : t1 is the values that you nead, and t is the indice for your vector a(t),b(t) and p(t). try this : s = 1e-9/7; t1 = 0.1e-9:0.01e-9:1e-9; for t = 1:length(t1); a(t) = (1-(t1(t)/s-3.5)^2); b(t) = exp(-0.5*(t1(t)/s-3.5)^2); p(t) = a(t)*b(t); end plot(t1,p) take care Jaber EL HADAD for t=0.1e-9:0.01e-9:1e-9 > s-9/7; > a(t)=(1-(t/s-3.5)^2); > b(t)=exp(-0.5*(t/s-3.5)^2); > p(t)=a(t)*b(t) >end >plot (t,p) > >Please help me with this program. > >Thank you, > >Jay Shah _________________________________________________________________ Charla con tus amigos en lea mediante MSN Messenger: http://messenger.yupimsn.com/