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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

0.99586757367491940.40833752941181880.16761088832763580.246858837322246340.432866472071836040.439979858216147270.432901310269353250.48137943311558130.477697063372825750.028839034648290067

(1)

HannWindowa

0.00.0477664170444813750.069252781506203250.185144127991684750.419813950831684930.426712842138145530.32467598270201490.198894385894360310.055879941240909150.0

(2)

cArray1..10,datatype=float8,order=C_order:

HannWindowa,container=c

0.00.0477664170444813750.069252781506203250.185144127991684750.419813950831684930.426712842138145530.32467598270201490.198894385894360310.055879941240909150.0

(3)

c

0.00.0477664170444813750.069252781506203250.185144127991684750.419813950831684930.426712842138145530.32467598270201490.198894385894360310.055879941240909150.0

(4)

aGenerateTone100,1,1π,π:

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]