extract.RdThis function is used to extract a sub-sample of data from a vector or matrix.
extract(x, sampling_rate, tst, ted)
| x | A vector or matrix of measurements. If x is a matrix, each column is treated as a separate measurement vector. |
|---|---|
| sampling_rate | the sampling rate in Hz of the data in x. |
| tst | Defines the start time in seconds of the interval to be extracted from x. |
| ted | Defines the end time in seconds of the interval to be extracted from x. |
X: A matrix containing a sub-sample of x. X has the same number of columns as x. The length of the sub-sample will be round(sampling_rate*(tend-tstart)) samples.
Output sampling rate is the same as the input sampling rate.
If either tst or ted are beyond the length of x, non-existing samples will be replaced with NaN in X.
BW <- beaked_whale extract(x = BW$A$data, sampling_rate = BW$A$sampling_rate, tst = 3, ted = 100)