Calculate ocean wave summary statistics, including significant wave height and period.
waveStatsZC(data, Fs, threshold = NULL, plot = FALSE)
A numeric vector of water surface height data. The data do not need to be detrended prior to use. Typical units = meters
Sampling frequency of the data, in Hz.
The minimum height necessary for a zero-crossing event to be considered a wave.
Set to TRUE if summary histograms of wave heights and wave periods are desired.
A list object containing summary statistic values.
Hsig Mean of the highest 1/3 of waves in the data set. Units =
same as input surface heights.
Hmean Overall mean wave height, for all waves (bigger than
H10 Mean height of the upper 10% of all waves.
Hmax Maximum wave height in the input data.
Tmean Mean period of all waves (bigger than threshold).
Units = seconds.
Tsig Mean period of
Hsig (highest 1/3 of waves).
Based on an upward zero-crossing algorithm originally provided by Urs Neumeier, v1.06. However, by default the algorithm is run as a downward zero-crossing process by inverting the data.
Original MATLAB function by Urs Neumeier: http://neumeier.perso.ch/matlab/waves.html
waveStatsSP for wave statistics determined using
spectral analysis methods.
data(wavedata) waveStatsZC(data = wavedata$swDepth.m, Fs = 4, plot = TRUE)#> $Hsig #>  0.3870003 #> #> $Hmean #>  0.2530191 #> #> $H10 #>  0.4686878 #> #> $Hmax #>  0.565325 #> #> $Tmean #>  9.622973 #> #> $Tsig #>  11.81855 #>