| im.apply {spatstat} | R Documentation |
Returns a pixel image obtained by applying a function to the values of corresponding pixels in several pixel images.
im.apply(X, FUN, ...)
X |
A list of pixel images (objects of class |
FUN |
A function that can be applied to vectors, or a character string giving the name of such a function. |
... |
Additional arguments to |
The argument X should be a list of pixel images
(objects of class "im"). If the images do not have
identical pixel grids, they will be converted to a common
grid using harmonise.im.
At each pixel location, the values of the images in X
at that pixel will be extracted as a vector. The function
FUN will be applied to this vector. The result (which should be
a single value) becomes the pixel value of the resulting image.
A pixel image (object of class "im").
Adrian Baddeley Adrian.Baddeley@curtin.edu.au
and Rolf Turner r.turner@auckland.ac.nz
eval.im for algebraic operations with images.
DA <- density(split(amacrine)) DA im.apply(DA, max)