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Syntax |
`fn2clp(` cutoff`, ` numin`, ` denin`, ` numout`, ` denout`)` |

See Also | fnbut , fncheb , fn2dlp |

Converts a normalized filter to a continuous lowpass filter. The real or double-precision scalar

The input values of

The response of a continuous filter is

2

|*num*[*s*]|

|------|

|*den*[*s*]|

where *num*[*s*]

is the numerator polynomial
and *den*[*s*]

is the denominator polynomial corresponding
to the filter.
The response of a normalized filter is near 1 for
*s*

in the interval

__

[0, \/-1]

and near 0 for the rest of the
positive imaginary axis.
The response of the continuous lowpass filter is near
1 for *s*

in the interval

__

[0, \/-1 *cutoff*]

and near 0 for the rest of the positive imaginary axis.
```
```

numin = 1.

denin = {1., sqrt(2.), 1.}

numout = novalue

denout = novalue

cutoff = 2.

fn2clp(cutoff, numin, denin, numout, denout)

xmin = 1e-1

xmax = 1e+1

ymin = 1e-4

ymax = 1e+2

fcplot(xmin, xmax, ymin, ymax, cutoff, numout, denout)

returns the following plot: