Description Usage Arguments Details Value Author(s) See Also Examples
Computes the orientation angle of each line segment in a line segment pattern.
1 | angles.psp(x, directed=FALSE)
|
x |
A line segment pattern (object of class |
directed |
Logical flag. See details. |
For each line segment, the angle of inclination to the x-axis (in radians) is computed, and the angles are returned as a numeric vector.
If directed=TRUE
, the directed angle of orientation
is computed. The angle respects the
sense of direction from (x0,y0)
to (x1,y1)
.
The values returned are angles in the full range from -π
to π. The angle is computed as
atan2(y1-y0,x1-x0)
. See atan2
.
If directed=FALSE
, the undirected angle of orientation
is computed. Angles differing by π are
regarded as equivalent. The values returned are angles
in the range from 0 to π. These angles are
computed by first computing the directed angle,
then adding π to any negative angles.
Numeric vector.
and \rolf
summary.psp
,
midpoints.psp
,
lengths.psp
1 2 |
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