Projection
Functions to manipulate the coordinate reference system (CRS) of ctmm objects
## S4 method for signature 'telemetry' projection(x,asText=TRUE) ## S4 method for signature 'ctmm' projection(x,asText=TRUE) ## S4 method for signature 'UD' projection(x,asText=TRUE) ## S4 method for signature 'list' projection(x,asText=TRUE) ## S4 method for signature 'NULL' projection(x,asText=TRUE) ## S4 replacement method for signature 'telemetry' projection(x) <- value ## S4 replacement method for signature 'list' projection(x) <- value ## S3 method for class 'telemetry' median(x,na.rm=FALSE,...) compass(loc=NULL,cex=3,...)
x |
A |
asText |
If |
value |
Projection to apply. Can also be a data.frame of longitude-latitude foci. |
na.rm |
Not used. |
... |
|
loc |
Optional two-dimensional coordinates (in meters) at which to draw a north-facing compass needle. |
cex |
Relative size of compass. |
projection(x) returns the projection information from ctmm object x, while projection(x) <- value applies the projection value to object x.
median(x) returns the ellipsoidal geometric median of a telemetry object.
compass(x,y) plots a north-pointing compass needle at the coordinates (x,y).
C. H. Fleming
# Load package and data library(ctmm) data(buffalo) # Apply a 1-point projection that preserves North==up projection(buffalo) <- median(buffalo) plot(buffalo) compass() # Apply a 2-point projection safer for elongated disributions projection(buffalo) <- median(buffalo,k=2) # This is the default projection for ctmm plot(buffalo) compass()
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