Re: Error exploring a Matlab example

[jmb]

On 10/21/2014 07:16 PM, vathomas wrote:
> Hi JMB,
>
> Pade function is not implemented, but you can do the approximation yourself.
> There are tables on the internet providing the coefficients, for example
> here: http://en.wikipedia.org/wiki/Pad%C3%A9_table
>
> Another way is to use the "pade" function from the development branch of
> control package:
> https://bitbucket.org/paramaniac/control-time-delay/src/f631625ecbd537ed3b0ef30d770a8126e13d3446/inst/pade.m?at=default
>
> Please be advised, calling the function with an LTI (like ss, or tf) as
> input argument, will error out for sure. But using the function as:
>>> [num, den] = pade(theta, N)
>>> Gp = tf(num,den)/(1+tau*s)
> where N is the order of the approximation, should do the job.
>
> Also if you want how good the approximation is just type
>>> pade(theta, N)
> and a comparison plot should appear.
>
> Best,
> Thomas
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Hello Thomas,

Wow, I am impressed by your response!  I have a lot of reading to do,
but your help is extremely useful!  Thanks a bunch.  I will experiment
with it...

Regards! JMB