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From: matlab_learner on 18 Mar 2010 20:13
hi all
i want to eliminate the for statement...but the boundaries need to be
fixed. is there a better way of writing this? i am using matlab.
thanks

d(1) = fi(2) - a*fi(1);
d(79) = fi(80) - c*fi(81);
for i = 3:79
d(i) = fi(i-1)
end


where a and c are scalars.
From: William Smith on 18 Mar 2010 20:31
matlab_learner <cibeji(a)gmail.com> wrote in message <91bf19f3-7065-4fe4-a6e5-1b7395c3eb8c(a)w27g2000pre.googlegroups.com>...
> hi all
> i want to eliminate the for statement...but the boundaries need to be
> fixed. is there a better way of writing this? i am using matlab.
> thanks
>
> d(1) = fi(2) - a*fi(1);
> d(79) = fi(80) - c*fi(81);
> for i = 3:79
> d(i) = fi(i-1)
> end
>
>
> where a and c are scalars.

How about d(3:79) = fi(2:78).

But why are you setting d(79) in the for loop and in the previous line as well?
From: matlab_learner on 18 Mar 2010 21:05
On Mar 18, 5:31 pm, "William Smith" <w...(a)commoditymodels.com> wrote:
> matlab_learner <cib...(a)gmail.com> wrote in message <91bf19f3-7065-4fe4-a6e5-1b7395c3e...(a)w27g2000pre.googlegroups.com>...
> > hi all
> > i want to eliminate the for statement...but the boundaries need to be
> > fixed. is there a better way of writing this? i am using matlab.
> > thanks
>
> >     d(1) = fi(2) - a*fi(1);
> >     d(79) = fi(80) - c*fi(81);
> >     for i = 3:79
> >         d(i) = fi(i-1)
> >     end
>
> > where a and c are scalars.
>
> How about d(3:79) = fi(2:78).
>
> But why are you setting d(79) in the for loop and in the previous line as well?

The problem is best solved in C. Using Matlab I am forced to shift my
index by 1
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