Averages the u and v components of a wind_series over its time steps, giving the mean wind
vector in each cell as a wind_field. Long series stored in files are processed in blocks,
without loading the whole series into memory.
Usage
# S4 method for class 'wind_series'
mean(x, ..., na.rm = FALSE)Details
The mean wind vector describes the net drift of the air over the series: where winds blow
from many directions, it is short even if winds are strong. It is similar to, but not the same
as, the net_flow() of a wind rose built from the series. Net flow describes the connectivity
model rather than the wind itself: it is shaped by trans, and with trans = 1 it is
typically a few percent weaker than the mean wind, because the rose divides each wind between
two neighbor directions. Use mean() to describe the wind, and net_flow() to describe the
wind rose used for connectivity modeling.
See also
subset_series() to average over selected time steps, such as one season.
Examples
series <- windscape_example("wind_series")
prevailing <- mean(series)