Extract a specified waveform from a labeled dataset
wave_extract.RdThe function wave_extract subsets data and returns the specified waveform.
Arguments
- data
A dataframe containing three columns: time, volts, waveform.
- wave
Desired type of waveform, e.g. pd1
- number
Integer denoting which instance of the specified waveform type to select - e.g. number = 1 will select the first instance of waveform type specified by wave parameter.
Value
A list containing 2 entries is returned: entry one is a tibble of time, volts, waveform is returned containing just the specified waveform instance. List entry 2 is the number/count of that type of waveform - e.g. if wave = "pd2" and there are 12 pd2 instances in the dataset, this entry will return 12.
Details
If the wave parameter input does not exactly match a waveform label in the data, the function will not work.
See also
Other waveform functions:
plot_pie(),
plot_wave(),
wave_duration(),
wave_occurrence(),
wave_topfreq(),
wave_volts()