[[,adv-method: Extract Something From an adv Object
Description
In addition to the usual extraction of elements by name, some shortcuts
are also provided, e.g. u1 retrieves v[,1], and similarly
for the other velocity components. The a and q
data can be retrived in raw form or numeric
form; see examples.
Usage
## S3 method for class 'adv':
[[(x, i, j, ...)
Arguments
x
An adv object, i.e. one inheriting from adv-class.