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SignalProcessing

  

HannWindow

  

multiply an array of samples by a Hann windowing function

 

Calling Sequence

Parameters

Options

Description

Thread Safety

Examples

Compatibility

Calling Sequence

HannWindow(A)

Parameters

A

-

Array of real or complex numeric values; the signal

Options

• 

container : Array, predefined Array for holding results

• 

inplace : truefalse, specifies that output should overwrite input

Description

• 

The HannWindow(A) command multiplies the Array A by a Hann windowing function and returns the result in an Array having the same length. The length of A must be at least 3.

• 

The Hann windowing function w is defined as follows for a sample with N points.

wk=0.50.5cos2πkN1

• 

For an Array with complex values, the real and imaginary parts are multiplied by the same windowing function.

• 

If the container=C option is provided, then the results are put into C and C is returned. With this option, no additional memory is allocated to store the result. The container must be an Array of the same size and datatype as A.

• 

If the inplace or inplace=true option is provided, then A is overwritten with the results. In this case, the container option is ignored.

Thread Safety

• 

The SignalProcessing[HannWindow] command is thread-safe as of Maple 17.

• 

For more information on thread safety, see index/threadsafe.

Examples

withSignalProcessing:

aGenerateUniform10,1,1

0.78521849215030790.58841396495699970.99316582269966760.92157828854397080.038780170958489240.0136057925410568920.210756972897798160.74960021581500880.138966357801109770.21228513401001725

(1)

HannWindowa

0.00.068831358424042520.41035219373339640.69118371640797820.037610805720498780.0131955276959160040.158067729673348620.309716752179997450.0162559758135429960.0

(2)

cArray1..10,'datatype'='float'8,'order'='C_order':

HannWindowa,'container'=c

0.00.068831358424042520.41035219373339640.69118371640797820.037610805720498780.0131955276959160040.158067729673348620.309716752179997450.0162559758135429960.0

(3)

c

0.00.068831358424042520.41035219373339640.69118371640797820.037610805720498780.0131955276959160040.158067729673348620.309716752179997450.0162559758135429960.0

(4)

aGenerateTone100,1,1Pi,Pi:

useplotsindisplayArraylistplota,listplotHannWindowaend use

Compatibility

• 

The SignalProcessing[HannWindow] command was introduced in Maple 17.

• 

For more information on Maple 17 changes, see Updates in Maple 17.

See Also

SignalProcessing[BartlettWindow]

SignalProcessing[BlackmanWindow]

SignalProcessing[HammingWindow]

SignalProcessing[KaiserWindow]