multiply an array of samples by an exponential windowing function
ExponentialWindow( A, alpha )
Array of real or complex numeric values; the signal
numeric value strictly between 0 and 1
container : Array, predefined Array for holding results
inplace : truefalse, specifies that output should overwrite input
The ExponentialWindow( A, alpha ) command multiplies the Array A by the exponential windowing function, with parameter alpha, and returns the result in an Array having the same length.
The exponential windowing function w⁡k with parameter alpha is defined as follows for a sample with N points.
The parameter alpha must lie in the open interval 0,1.
Before the code performing the computation runs, A is converted to datatype float or complex if it does not have one of those datatypes already. For this reason, it is most efficient if A has one of these datatypes beforehand. This does not apply if inplace is true.
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.
The SignalProcessing[ExponentialWindow] command is thread-safe as of Maple 18.
For more information on thread safety, see index/threadsafe.
N ≔ 1024:
a ≔ GenerateUniform⁡N,−1,1
a ≔ 1 .. 1024 ArrayData Type: float8Storage: rectangularOrder: C_order
1 .. 1024 VectorrowData Type: float8Storage: rectangularOrder: C_order
c ≔ Array⁡1..N,'datatype'='float'8,'order'='C_order':
u ≔ `~`[log]⁡FFT⁡c:
The SignalProcessing[ExponentialWindow] command was introduced in Maple 18.
For more information on Maple 18 changes, see Updates in Maple 18.
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