The Filter IIR calculation allows you to create a filter and apply it to a data series.
The user may select which class their filter is to be, as well as the Response type. Certain other parameters must also be specified: Order, Corner Frequency etc.
In the script, the filter is built using a combination of direct user
specified parameters and enumerated user specified parameters (see Section 5 for
details on enumerated parameters). The built function used is
.filterIIR(…).
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