fvtool

(To be removed) Visualize filter bank

The fvtool function will be removed in a future release. Use visualize instead.

Syntax

fvtool(obj)

fvtool(obj,ind)

fvtool(___,N=n)

Description

fvtool(obj) visualizes the filters in the filter bank using the Filter Visualization Tool (FVTool).

fvtool(obj,ind) visualizes the filters corresponding to the elements in the vector ind.

fvtool(___,N=n) specifies the number of points used to visualize the filters.

Examples

View octaveFilterBank in FVTool

Create an octaveFilterBank object. Call fvtool to visualize the filter bank.

octFiltBank = octaveFilterBank;
fvtool(octFiltBank)

ans = 
  Figure (filtervisualizationtool) with properties:

      Number: []
        Name: 'Figure 1: Magnitude Response (dB)'
       Color: [0.9608 0.9608 0.9608]
    Position: [167 243 560 337.1852]
       Units: 'pixels'

  Use get to show all properties

To visualize a subset of filters in the filter bank, specify the second argument as a row vector of indices between one and the number of filters in the filter bank. If not specified, fvtool visualizes 1 to N filters of the filter bank, where N is the smallest of octFiltBank.NumFilters and 64. Visualize the ninth filter.

fvtool(octFiltBank,9)

ans = 
  Figure (filtervisualizationtool) with properties:

      Number: []
        Name: 'Figure 2: Magnitude Response (dB)'
       Color: [0.9608 0.9608 0.9608]
    Position: [1 1 1024 657]
       Units: 'pixels'

  Use get to show all properties

To specify the number of points in the frequency response, use the N name-value argument. Specify that the frequency response contains 8192 points.

fvtool(octFiltBank,N=8192)

ans = 
  Figure (filtervisualizationtool) with properties:

      Number: []
        Name: 'Figure 3: Magnitude Response (dB)'
       Color: [0.9608 0.9608 0.9608]
    Position: [167 243 560 337.1852]
       Units: 'pixels'

  Use get to show all properties

View gammatoneFilterBank in FVTool

Create a gammatoneFilterBank object. Call fvtool to visualize the filter bank.

gammaFiltBank = gammatoneFilterBank;
fvtool(gammaFiltBank);

To visualize a subset of filters in the filter bank, specify the second argument as a row vector of indices between one and the number of filters in the filter bank. If not specified, fvtool visualizes 1 to N filters of the filter bank, where N is the smallest of gammaFiltBank.NumFilters and 64. Visualize the ninth filter.

fvtool(gammaFiltBank,9);

To specify the number of points in the frequency response, use the N name-value argument. Specify that the frequency response contains 8192 points.

fvtool(gammaFiltBank,N=8192);

Input Arguments

obj — Object to get filter frequency responses from

gammatoneFilterBank | octaveFilterBank

Object to get filter frequency responses from, specified as an object of gammatoneFilterBank or octaveFilterBank.

ind — Indices of filters to calculate frequency responses from

1:max(N,64) (default) | row vector of integers with values in the range [1, N]

Indices of filters to calculate frequency responses from, specified as a row vector of integers with values in the range [1, N]. N is the total number of filters designed by obj.

n — Number of points

8192 (default) | positive integer

Number of points used to visualize the filters, specified as a positive integer.

Data Types: single | double | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64

Version History

Introduced in R2019a

R2024b: To be removed

The fvtool function will be removed in a future release. Use visualize instead.