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R: This is the target function whose zero is searched to crete...

omega_root

R Documentation

This is the target function whose zero is searched to crete the inverse function of `omega`.

Description

This is the target function whose zero is searched to crete the inverse function of omega.

Usage

omega_root(x = 0.5, p0_v1 = 0.5, p0_v2 = 0.5, p00 = p0_v1 * p0_v2,
  correlation = NA)

Arguments

`x`	value of expected correlation between the corresponding Gaussian-distributed variables
`p0_v1,p0_v2`	probablity of no precipitatin occurences for the v1 and v2 time series respectively.
`p00`	probability of no precipitation occurence in both v1 and v2 simultanously returned by `omega`
`correlation`	numerical value. DEfault is `NA`. Binary correlation retured by `omega` when the argumet `correlation=TRUE`

Value

the value p00-omega(x=x,p0_v1=p0_v1,p0_v2=p0_v2) or correlation-omega(x=x,p0_v1=p0_v1,p0_v2=p0_v2) (if correlation is not NA)

Note

This function makes use of normal copula

Author(s)

Emanuele Cordano

Examples

rho <- 0.4
p00 <- omega(x=rho,p0_v1=0.5,p0_v2=0.5)
omega_root(x=rho,p0_v1=0.5,p0_v2=0.5,p00=p00)

Results


R version 3.3.1 (2016-06-21) -- "Bug in Your Hair"
Copyright (C) 2016 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu (64-bit)

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> library(RGENERATEPREC)
Loading required package: copula
Loading required package: RGENERATE
Loading required package: RMAWGEN
Loading required package: chron
Loading required package: date
Loading required package: vars
Loading required package: MASS
Loading required package: strucchange
Loading required package: zoo

Attaching package: 'zoo'

The following objects are masked from 'package:base':

    as.Date, as.Date.numeric

Loading required package: sandwich
Loading required package: urca
Loading required package: lmtest

Attaching package: 'vars'

The following object is masked from 'package:copula':

    A

Loading required package: blockmatrix
Loading required package: Matrix
Loading required package: stringr

Attaching package: 'stringr'

The following object is masked from 'package:strucchange':

    boundary

> png(filename="/home/ddbj/snapshot/RGM3/R_CC/result/RGENERATEPREC/omega_root.Rd_%03d_medium.png", width=480, height=480)
> ### Name: omega_root
> ### Title: This is the target function whose zero is searched to crete the
> ###   inverse function of 'omega'.
> ### Aliases: omega_root
> 
> ### ** Examples
> 
> rho <- 0.4
> p00 <- omega(x=rho,p0_v1=0.5,p0_v2=0.5)
> omega_root(x=rho,p0_v1=0.5,p0_v2=0.5,p00=p00)
[1] 0
> 
> 
> 
> 
> 
> dev.off()
null device 
          1 
>

This is the target function whose zero is searched to crete the inverse function of omega.