National Instruments 320571-01 用户手册

Applies a Hanning window to the input
sequence X.  If Y represents the output
sequence Hanning {X}, the elements of Y are
obtained using the formula:

y

i

  =  0.5 x

i

 [1 - cos(w)]

for  i = 0, 1, 2, …, n-1 ,

w  =  

2

π

i

n

 ,

where n is the number of elements in the input sequence X.

X is a DSP Handle Cluster that indicates the memory buffer on the DSP board that contains the input
data array.

Note: The operation is performed in place and the input array X is overwritten by the output

Hanning {X} is a DSP Handle Cluster that is identical to X, but with the results of Hanning {X} already
stored in the memory buffer on the DSP board.

error in (no error) contains the error information from a previous VI.  If an error occurs, it is passed out
error out and no other calls are made.

error out contains the error information for this call.