[Scilab-users] Difference btween flts and filter

2019-10-25 Thread Federico Miyara


Dear all,

I would like to know if there is a fundamental difference between
functions flts and filter.

For instance performance, accuracy, speed, versatility...

I had asked some time ago but had no answer.

Thanks.

Regards,

Federico Miyara

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[Scilab-users] Inconsistency in polynomial coefficient order?

2019-10-25 Thread Federico Miyara


Dear all,

I'm somewhat puzzled by what appears to be an inconsistency in
polynomial coefficient order.

Consider the polynomial

A = 1 + 2*x + 3*x^2;

If I want to create it using poly I must write

A = poly([1 2 3], 'x', 'coeff');

But if I want to use it as the denominator of a filter (whose numerator
we can call B) I must write

y = filter(B, [3 2 1], x);

Is there a reason for this?

Regards,

Federico Miyara


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Re: [Scilab-users] Inconsistency in polynomial coefficient order?

2019-10-25 Thread Stéphane Mottelet
Hello 

I think this is due to the Matlab convention, as filter syntax is the same in 
Scilab.

S.

> Le 25 oct. 2019 à 23:25, Federico Miyara  a écrit :
> 
>  
> Dear all,
> 
> I'm somewhat puzzled by what appears to be an inconsistency in polynomial 
> coefficient order.
> 
> Consider the polynomial
> 
> A = 1 + 2*x + 3*x^2;
> 
> If I want to create it using poly I must write
> 
> A = poly([1 2 3], 'x', 'coeff');
> 
> But if I want to use it as the denominator of a filter (whose numerator we 
> can call B) I must write
> 
> y = filter(B, [3 2 1], x);
> 
> Is there a reason for this?
> 
> Regards,
> 
> Federico Miyara
> 
>   Libre de virus. www.avast.com
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> users mailing list
> users@lists.scilab.org
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