Signal Processing Toolbox

dfilt.scalar

Construct a discrete-time, scalar gain filter object

Syntax

• Hd = dfilt.scalar(g)
  Hd = dfilt.scalar
  

Description

Hd = dfilt.scalar(g) returns a discrete-time, scalar gain filter object, Hd, with gain g, where g is a scalar.

Hd = dfilt.scalar returns a default, discrete-time scalar gain filter object, Hd, with gain 1.

Example

Create a direct form I filter object and a scalar object with a gain of 3 and cascade them together, and display them using FVTool.

• b = [0.3 0.6 0.3];
  a = [1 0 0.2];
  Hd_filt = dfilt.df1(b,a)
  Hd_filt =
       FilterStructure: 'Direct form I'
             Numerator: [0.3000 0.6000 0.3000]
           Denominator: [1 0 0.2000]
  Hd_gain = dfilt.scalar(3)
  Hd_gain =
       FilterStructure: 'Scalar'
                 Gain: 3
  Hd=cascade(Hd_gain,Hd_filt)
  Hd =
  Cascade
  Section(1) = 
      FilterStructure: 'Scalar'
                 Gain: 3
  Section(2) = 
      FilterStructure: 'Direct form I'
            Numerator: [0.3000 0.6000 0.3000]
          Denominator: [1 0 0.2000]
  fvtool(Hd_filt,Hd_gain,Hd)
  
  
  

See Also

dfilt, dfilt.cascade

dfilt.parallel

dfilt.statespace