# Ops.msr

0th

Percentile

##### Arithmetic Operations on Measures

These group generic methods for the class "msr" allow the arithmetic operators +, -, * and / to be applied directly to measures.

Keywords
methods, spatial
##### Usage
## S3 methods for group generics have prototypes:
Ops(e1, e2)

##### Arguments
e1, e2

objects of class "msr".

##### Details

Arithmetic operators on a measure A are only defined in some cases. The arithmetic operator is effectively applied to the value of A(W) for every spatial domain W. If the result is a measure, then this operation is valid.

If A is a measure (object of class "msr") then the operations -A and +A are defined.

If A and B are measures with the same dimension (i.e. both are scalar-valued, or both are k-dimensional vector-valued) then A + B and A - B are defined.

If A is a measure and z is a numeric value, then A * z and A / z are defined, and z * A is defined.

##### Value

Another measure (object of class "msr").

with.msr

• Ops.msr
##### Examples
# NOT RUN {
X <- rpoispp(function(x,y) { exp(3+3*x) })
fit <- ppm(X, ~x+y)
rp <- residuals(fit, type="pearson")
rp

-rp
2 * rp
rp /2

rp - rp

rr <- residuals(fit, type="raw")
rp - rr
# }

Documentation reproduced from package spatstat, version 1.59-0, License: GPL (>= 2)

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