Integral on a Linear Network
Computes the integral (total value) of a function or pixel image over a linear network.
## S3 method for class 'linim' integral(f, domain=NULL, ...) ## S3 method for class 'linfun' integral(f, domain=NULL, ..., delta)
f |
A pixel image on a linear network (class |
domain |
Optional window specifying the domain of integration. Alternatively a tessellation. |
... |
Ignored. |
delta |
Optional. The step length (in coordinate units) for computing the approximate integral. A single positive number. |
The integral (total value of the function over the network) is calculated.
If domain is a window (class "owin") then the integration
will be restricted to this window. If domain is a tessellation
(class "tess") then the integral of f in each
tile of domain will be computed.
A single numeric or complex value
(or a vector of such values if domain is a tessellation).
Adrian Baddeley Adrian.Baddeley@curtin.edu.au, Rolf Turner r.turner@auckland.ac.nz and Ege Rubak rubak@math.aau.dk.
# make some data
xcoord <- linfun(function(x,y,seg,tp) { x }, simplenet)
integral(xcoord)
X <- as.linim(xcoord)
integral(X)
# integrals inside each tile of a tessellation
A <- quadrats(Frame(simplenet), 3)
integral(X, A)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.