# Math.imlist

##### S3 Group Generic methods for List of Images

These are group generic methods for the class `"imlist"`

of lists of images. These methods
allows the usual mathematical functions and operators to be applied
directly to lists of images. See Details for a list of implemented functions.

##### Usage

```
## S3 methods for group generics have prototypes:
````Math(x, \dots)`

`Ops(e1, e2)`

`Complex(z)`

`Summary(\dots, na.rm = TRUE)`

##### Arguments

- x, z, e1, e2
objects of class

`"imlist"`

.- …
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 lists of 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.

Group

`"Math"`

:`abs`

,`sign`

,`sqrt`

,`floor`

,`ceiling`

,`trunc`

,`round`

,`signif`

`exp`

,`log`

,`expm1`

,`log1p`

,`cos`

,`sin`

,`tan`

,`cospi`

,`sinpi`

,`tanpi`

,`acos`

,`asin`

,`atan`

`cosh`

,`sinh`

,`tanh`

,`acosh`

,`asinh`

,`atanh`

`lgamma`

,`gamma`

,`digamma`

,`trigamma`

`cumsum`

,`cumprod`

,`cummax`

,`cummin`

Group

`"Ops"`

:`"+"`

,`"-"`

,`"*"`

,`"/"`

,`"^"`

,`"%%"`

,`"%/%"`

`"&"`

,`"|"`

,`"!"`

`"=="`

,`"!="`

,`"<"`

,`"<="`

,`">="`

,`">"`

Group

`"Summary"`

:`all`

,`any`

`sum`

,`prod`

`min`

,`max`

`range`

Group

`"Complex"`

:`Arg`

,`Conj`

,`Im`

,`Mod`

,`Re`

##### Value

The result of `"Math"`

, `"Ops"`

and `"Complex"`

group
operations is another list of images.
The result of `"Summary"`

group operations is a numeric vector of
length 1 or 2.

##### See Also

`Math.im`

or `eval.im`

for evaluating expressions involving images.

##### Examples

```
# NOT RUN {
a <- Smooth(finpines, 2)
log(a)/2 - sqrt(a)
range(a)
# }
```

*Documentation reproduced from package spatstat, version 1.63-0, License: GPL (>= 2)*