addStage

Add filter stage to cascade

Syntax

addStage(FC,newFilt)

addStage(FC,newFilt,stageId)

Description

addStage(FC,newFilt) adds a filter stage represented by the newFilt System object™ as the final stage of the dsp.FilterCascade System object, FC. To see which System objects you can add to a filter cascade, use:

dsp.FilterCascade.helpSupportedSystemObjects

addStage(FC,newFilt,stageId) adds newFilt at stage position stageId of the filter cascade FC. All existing filters from stageId to the end of the cascade are shifted up in the cascade when newFilt is added.

Examples

Add Filter Stage to Filter Cascade

Call addStage with only the System object™ arguments,. The function adds the new filter stage as the final stage in the filter cascade.

FC = dsp.FilterCascade 

FC = 
  dsp.FilterCascade with properties:

         Stage1: [1x1 dsp.FIRFilter]
    CloneStages: true

addStage(FC,dsp.IIRFilter)
FC

FC = 
  dsp.FilterCascade with properties:

         Stage1: [1x1 dsp.FIRFilter]
         Stage2: [1x1 dsp.IIRFilter]
    CloneStages: true

Call addStage with an index argument. The function adds the new filter stage at the specified index. This example creates a filter cascade with three stages, and then adds a filter as the second stage of the cascade.

FC = dsp.FilterCascade(dsp.CICDecimator,dsp.FIRDecimator,dsp.FIRFilter)

FC = 
  dsp.FilterCascade with properties:

         Stage1: [1x1 dsp.CICDecimator]
         Stage2: [1x1 dsp.FIRDecimator]
         Stage3: [1x1 dsp.FIRFilter]
    CloneStages: true

addStage(FC,dsp.IIRFilter,2)
FC

FC = 
  dsp.FilterCascade with properties:

         Stage1: [1x1 dsp.CICDecimator]
         Stage2: [1x1 dsp.IIRFilter]
         Stage3: [1x1 dsp.FIRDecimator]
         Stage4: [1x1 dsp.FIRFilter]
    CloneStages: true

Input Arguments

FC — Filter cascade

dsp.FilterCascade System object

Filter cascade, specified as a dsp.FilterCascade System object.

newFilt — Filter stage to add

filter System object | delay System object | scalar gain value

Filter stage to add, specified as one of the supported System objects or a scalar gain value. Each stage can be a filter or delay object, or a scalar gain value. To see which System objects you can add to a filter cascade, use:

dsp.FilterCascade.helpSupportedSystemObjects

stageId — Index of filter stage to be added

positive integer

Index of filter stage to be added, specified as a positive integer. The object adds this stage to the filter cascade. All existing filters from stageId to the end of the cascade are shifted up in the cascade when the new filter is added.

Version History

Introduced in R2014b