Checks whether any pixel values in a pixel image are NA
(meaning that the pixel lies outside the domain of definition of the
image).
# S3 method for im
anyNA(x, recursive = FALSE)A pixel image (object of class "im").
Ignored.
A single logical value.
The function anyNA is generic: anyNA(x) is a
faster alternative to any(is.na(x)).
This function anyNA.im is a method for the generic anyNA
defined for pixel images. It returns the value TRUE if any of the pixel
values in x are NA, and
and otherwise returns FALSE.
# NOT RUN {
anyNA(as.im(letterR))
# }
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