rounding {spatstat.geom}

Detect Numerical Rounding

Description

Given a numeric vector, or an object containing numeric spatial coordinates, determine whether the values have been rounded to a certain number of decimal places.

Usage

rounding(x)

## Default S3 method:
rounding(x)

## S3 method for class 'ppp'
rounding(x)

## S3 method for class 'pp3'
rounding(x)

## S3 method for class 'ppx'
rounding(x)

Arguments

x

A numeric vector, or an object containing numeric spatial coordinates.

Details

For a numeric vector x, this function determines whether the values have been rounded to a certain number of decimal places.

• If the entries of x are not all integers, then rounding(x) returns the smallest number of digits d after the decimal point such that round(x, digits=d) is identical to x. For example if rounding(x) = 2 then the entries of x are rounded to 2 decimal places, and are multiples of 0.01.

• If all the entries of x are integers, then rounding(x) returns -d, where d is the smallest number of digits before the decimal point such that round(x, digits=-d) is identical to x. For example if rounding(x) = -3 then the entries of x are multiples of 1000. If rounding(x) = 0 then the entries of x are integers but not multiples of 10.

• If all entries of x are equal to 0, the rounding is not determined, and a value of NULL is returned.

For a point pattern (object of class "ppp") or similar object x containing numeric spatial coordinates, this procedure is applied to the spatial coordinates.

Value

An integer.

Author(s)

Adrian Baddeley [e-mail]

and Rolf Turner [e-mail]

See Also

round.ppp

Examples

   rounding(c(0.1, 0.3, 1.2))
   rounding(c(1940, 1880, 2010))
   rounding(0)
   rounding(cells)