# SHP

## Purpose:

Emulates a single pole analog high pass filter.

## Syntax:

SHP(series, fc)

 series - A series or table. fc - A real, the cutoff frequency in Hertz.

A series.

## Example:

W1: gsqrwave(100, .01, 4)

W2: shp(W1, 10)

Highpass filters the squarewave in W1 with a cutoff frequency of 10 Hz. The sample rate is set to the sample rate of the input data.

## Remarks:

The single pole analog highpass filter is implemented in the digital domain using the impulse invariance technique.