Re: Arbitrary frequence response

On 20 Feb, 16:57, Randy Yates <ya...@xxxxxxxx> wrote:
Rune Allnor <all...@xxxxxxxxxxxx> writes:
On 20 Feb, 13:36, Randy Yates <ya...@xxxxxxxx> wrote:
Rune Allnor <all...@xxxxxxxxxxxx> writes:
On 20 Feb, 08:34, "kungcoccos" <c...@xxxxxxxxxxxxx> wrote:
Hi!

I would like to create a filter with an inverse sinc-like form in the
passband

What does 'inverse sinc' mean? Are you talking about time domain
or frequency domain? Do you know how to design FIR filters by
the window method? If so, how is what you want to do different
from that method?

using the most effective algoritm. For now I using fir2, but I
suspect that it is not the most cost efficient method. Is it any?

A somewhat unique problem. Cost efficiency is usually a
very important issue at the *implementation* stage; cost
efficiency has not been an issue in design stages for
decades.

You're being too pedantic/anal, Rune (good in design, bad in human
interaction). The OP probably meant "implementation efficiency" - it
seems to make more sense given the context.

If I need to use terms like 'probably' and 'seem' to understand
a question, I ask for clarifications. If you think that is
too pedantical then that's your problem.

I think asking for clarification is good. However, I didn't see you
asking anything with respect to the efficiency issue. What I saw is you
hammering someone for not asking a question in precisely the right way.

So what?

If you take half the time you spend nagging on me and actually
check out what the guy in fact asks for, you will find that the
matlab function FIR2 is a filter *design* function. Just check
out the online matlab docs if you don't have access to the SP
toolbox.

Since you are so upset about this (and for to settle my own
curiosity) -- when was the last time you encountered computational
efficiency issues as the main limitation when computing coefficients
of filters?

Rune
.

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