These are group generic methods for images of class "im", which
allows for usual mathematical functions and operators to be applied
directly to images. See Details for a list of implemented functions.
Usage
## S3 methods for group generics have prototypes:
Math(x, ...)Ops(e1, e2)Complex(z)Summary(..., na.rm = FALSE)
Arguments
x, z, e1, e2
objects of class "im".
...
further arguments passed to methods.
na.rm
logical: should missing values be removed?
Details
Below is a list of mathematical functions and operators which are
defined for images. Not all functions will make sense for all
types of images. For example, none of the functions in the "Math" group
make sense for character-valued images. Note that the "Ops"
group methods are implemented using eval.im, which tries
to harmonise images via harmonise.im if they aren't
compatible to begin with.
## Convert gradient values to angle of inclination: inc <- atan(bei.extra$grad) * 180/pi## Make logical image which is TRUE when heat equals 'Moderate': A <- gorillas.extra$heat == "Moderate"