Log simulation data in buffer
The SignalSink object logs MATLAB® simulation data. This object accepts any numeric data type.
To log MATLAB simulation data :
H = dsp.SignalSink returns a signal sink, H, that logs 2-D input data in the object.
H = dsp.SignalSink('PropertyName',PropertyValue,...) returns a signal sink, H, with each specified property set to the specified value.
Process input as frames or samples
To enable frame-based processing for 2-D inputs, set this property to true. When you set this property to false, the object performs sample-based processing on 2-D inputs. The signal sink object always performs sample-based processing for N-D inputs when N is greater than 2. The default is true.
Maximum number of input frames or samples to log
Specify the maximum number of frames to log when the object is performing frame-based processing, or the maximum number of samples to log when the object is performing sample-based processing. The object always preserves the most recent data in the buffer. When you specify a buffer length that is greater than the input length, the object pads the end of the logged data with zeros. To capture all input data without extra padding, set the BufferLength property to inf. The default is inf.
Setting this property to any positive integer d causes the signal sink to write data at every dth sample. The default is 1.
Output dimensionality for frame-based inputs
Set the dimension of the output array for frame-based inputs as 2-D array (concatenate) or 3-D array (separate). Concatenation occurs along the first dimension for 2-D array (concatenate). This property applies only when you set the FrameBasedProcessing property to true. The default is 2-D array (concatenate).
Logged Data (read only)
The signal sink writes simulation data into a buffer. Specify the maximum length of the buffer with the BufferLength property.
|clone||Create signal logger object with same property values|
|getNumInputs||Number of expected inputs to step method|
|getNumOutputs||Number of outputs of step method|
|isLocked||Locked status for input attributes and nontunable properties|
|release||Allow property value and input characteristics changes|
|reset||Reset internal states of signal logger object|
|step||Store signal in buffer|
Log input data.
hlog = dsp.SignalSink; for i=1:10 y = sin(i); step(hlog,y); end log = hlog.Buffer; % log = sin([1;2;3;4;5;6;7;8;9;10])
This object implements the algorithm, inputs, and outputs described on the To Workspace block reference page. The object properties correspond to the block properties, except:
|The object always generates fixed-point output for fixed-point input.|
Objects and blocks interpret frames differently. Objects process inputs as frames or as samples by setting the FrameBasedProcessing property. Blocks process inputs as frames or as samples by inheriting the frame information from the input ports. See Set the FrameBasedProcessing Property of a System object for more information.