Continuously decimates an input sequence according to a specific decimating factor and averaging method.
A Boolean that specifies whether to initialize the decimation.
True | Initializes the decimation. |
False | Does not initialize the decimation. |
If reset is True or if this node runs for the first time, this node initializes the decimation from the sample of x specified by start index. When the node runs again with reset set to False, this node initializes the decimation from the final state of the previous call to the node.
Processing a Large Data Sequence Consisting of Smaller Blocks
To process a large data sequence that consists of smaller blocks, set reset to True for the first block and to False for all remaining blocks. You also can set reset to True at regular intervals of blocks to periodically reset the sample from which the decimation begins.
Default: False
Input sequence.
This input accepts the following data types:
The factor by which this node decimates the input sequence. decimating factor must be greater than zero. If decimating factor is greater than the number of elements in signal or less than or equal to zero, this node sets decimated signal to an empty array and returns an error.
Default: 1
Index of the sample from which the node starts to decimate the input sequence. start index must be greater than or equal to zero.
This input is available only if you wire one of the following data types to signal:
This input changes to start time when the data type of signal is a waveform or a 1D array of waveforms.
Default: 0
Time at which the node starts to decimate the input sequence.
This input is available only if you wire one of the following data types to signal:
This input changes to start index when the data type of signal is an array of numbers.
Error conditions that occur before this node runs.
The node responds to this input according to standard error behavior.
Standard Error Behavior
Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.
Default: No error
Decimated sequence of the input sequence.
This output can return the following data types:
Error information.
The node produces this output according to standard error behavior.
Standard Error Behavior
Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.
If Y represents the output sequence decimated signal, this node obtains the elements of the sequence Y using the following equation.
If averaging? is False, ${Y}_{i}={x}_{i*m+s}$
for i = 0, 1, 2,..., size - 1,
$\mathrm{size}=\lceil \frac{n-s}{m}\rceil $,
If averaging? is True, ${Y}_{i}=\frac{1}{m}\sum _{k=0}^{m-1}{x}_{i*m+s+k}$
for i = 0, 1, 2,..., size - 1,
$\mathrm{size}=\lfloor \frac{n-s}{m}\rfloor $,
where
Where This Node Can Run:
Desktop OS: Windows
FPGA: Not supported
Web Server: Not supported in VIs that run in a web application