Description Usage Arguments Value Author(s) See Also
View source: R/quadscheme.lt.R
Creates a quadrature for spatstat from a study area, observations, and lines
1 2 |
study.area |
owin class giving the boundaries of the study area |
observations |
- data frame of observations with the following structure label - label linking it to a unique line x - x coordinate y - y coordinate distance- perpendicular distance from center line ... - any number of covariates |
lines |
- data frame of lines with the following structure label - unique label x0 - x coordinate of beginning of line y0 - y coordinate of beginning of line x1 - x coordinate of end of line y1 - y coordinate of end of line width - optional full width of transect around line angle - angle of rotation to get to vertical ... - any number of covariates |
width |
if no width field is given in lines then it must be specified here as a constant width for all lines |
epsvu |
pixel dimensions epsvu[1] in v direction (height) and epsvu[2] in u direction (width) (these are used once line is rotated vertically. |
show.warnings |
if TRUE, warnings from quadrature construction will be shown. |
Q |
quadscheme as defined in spatstat |
transects |
list of transect polygon dataframes |
lines.psp |
line segment process |
Devin Johnson; Jeff Laake
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