Last data update: 2014.03.03

R: Forward estimators after m steps
ForwardSearch.stoppedR Documentation

Forward estimators after m steps

Description

A Forward Search gives a sequence of regression estimators. This function gives the regression estimators when stopped at m.

Usage

ForwardSearch.stopped(FS, m)

Arguments

FS

List. Value of the function ForwardSearch.fit.

m

Integer. Stopping time.

Value

ranks.selected

Vector. Ranks of m observations in the selected set.

ranks.outliers

Vector. Ranks of n-m observations that are not selected. These are the "outliers". It is the complement to ranks.selected.

beta.m

Vector. Least squares estimator based on ranks.selected.

sigma2.biased Scalar.

Scalar. Least squares residual variance based on ranks.selected. Value is *not* bias corrected.

Author(s)

Bent Nielsen <bent.nielsen@nuffield.ox.ac.uk> 9 Sep 2014

References

Johansen, S. and Nielsen, B. (2013) Asymptotic analysis of the Forward Search. Download: Nuffield DP.

Johansen, S. and Nielsen, B. (2014) Outlier detection algorithms for least squares time series. Download: Nuffield DP.

Examples

#####################
#	EXAMPLE 1
#	using Fulton Fish data,
#	see Johansen and Nielsen (2014).

#	Call package
library(ForwardSearch)

#	Call data
data(Fulton)
mdata	<- as.matrix(Fulton)
n		<- nrow(mdata)

#	Identify variable to reproduce Johansen and Nielsen (2014)
q		<- mdata[2:n		,9]
q_1		<- mdata[1:(n-1) ,9]
s		<- mdata[2:n		,6]
x.q.s	<- cbind(q_1,s)
colnames(x.q.s	)	<- c("q_1","stormy")

#	Fit Forward Search
FS95	<- ForwardSearch.fit(x.q.s,q,psi.0=0.95)

ForwardSearch.stopped(FS95,107)

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)

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.

R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.

Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.

> library(ForwardSearch)
Loading required package: robustbase
> png(filename="/home/ddbj/snapshot/RGM3/R_CC/result/ForwardSearch/ForwardSearch.stopped.Rd_%03d_medium.png", width=480, height=480)
> ### Name: ForwardSearch.stopped
> ### Title: Forward estimators after m steps
> ### Aliases: ForwardSearch.stopped
> 
> ### ** Examples
> 
> #####################
> #	EXAMPLE 1
> #	using Fulton Fish data,
> #	see Johansen and Nielsen (2014).
> 
> #	Call package
> library(ForwardSearch)
> 
> #	Call data
> data(Fulton)
> mdata	<- as.matrix(Fulton)
> n		<- nrow(mdata)
> 
> #	Identify variable to reproduce Johansen and Nielsen (2014)
> q		<- mdata[2:n		,9]
> q_1		<- mdata[1:(n-1) ,9]
> s		<- mdata[2:n		,6]
> x.q.s	<- cbind(q_1,s)
> colnames(x.q.s	)	<- c("q_1","stormy")
> 
> #	Fit Forward Search
> FS95	<- ForwardSearch.fit(x.q.s,q,psi.0=0.95)
> 
> ForwardSearch.stopped(FS95,107)
$res
               [,1]
  [1,] -0.643120941
  [2,] -0.276639648
  [3,]  0.364210858
  [4,] -0.475854200
  [5,]  0.662212451
  [6,]  0.151680947
  [7,]  0.370940422
  [8,] -0.443856126
  [9,]  0.529152538
 [10,]  0.183196876
 [11,]  0.212387653
 [12,]  0.557285732
 [13,]  0.847669950
 [14,]  0.332051069
 [15,]  0.693556422
 [16,] -0.628388507
 [17,] -1.963154228
 [18,]  0.261579655
 [19,]  0.841030661
 [20,] -0.494715888
 [21,] -0.358568522
 [22,]  0.203320030
 [23,]  0.996026199
 [24,] -0.258010987
 [25,] -0.120547741
 [26,]  0.851843435
 [27,] -0.220442565
 [28,]  0.683225679
 [29,] -0.147866333
 [30,] -0.590044082
 [31,]  0.215960636
 [32,] -1.144971170
 [33,] -1.823326081
 [34,] -1.193777405
 [35,] -0.200088378
 [36,]  0.500632806
 [37,]  0.559376968
 [38,] -0.015251986
 [39,] -0.064196651
 [40,] -0.563659216
 [41,]  0.044932157
 [42,] -0.298953221
 [43,]  0.719234124
 [44,] -0.823951410
 [45,] -1.064851264
 [46,]  0.301618644
 [47,]  0.283101422
 [48,]  0.395470594
 [49,] -0.434313447
 [50,]  0.340268643
 [51,]  0.330224908
 [52,]  0.780413417
 [53,]  0.984106091
 [54,] -0.652240637
 [55,]  0.010497938
 [56,]  0.321427688
 [57,] -0.369586392
 [58,] -1.036750532
 [59,] -0.768113493
 [60,] -0.293393867
 [61,]  0.473175075
 [62,] -0.084904056
 [63,]  0.478362082
 [64,]  0.270093626
 [65,]  0.482167732
 [66,] -0.193605683
 [67,]  1.277737769
 [68,]  0.342505951
 [69,] -0.640744222
 [70,]  0.969427033
 [71,] -0.355882686
 [72,]  0.991603927
 [73,]  0.368764186
 [74,] -1.315814409
 [75,]  0.011180212
 [76,]  0.585753171
 [77,] -0.875898385
 [78,] -0.412068038
 [79,] -0.687131592
 [80,]  0.744270392
 [81,] -1.065422651
 [82,] -0.530578984
 [83,] -1.221325575
 [84,] -0.072131103
 [85,]  0.636543402
 [86,]  0.806952001
 [87,]  0.181785219
 [88,] -1.450318870
 [89,]  0.826114797
 [90,] -0.038843596
 [91,] -0.134109101
 [92,] -0.047273023
 [93,] -1.327615354
 [94,] -2.403622110
 [95,]  0.695619068
 [96,]  0.020718996
 [97,]  0.538574923
 [98,] -0.471337865
 [99,]  0.057962207
[100,]  0.933140570
[101,] -0.247668393
[102,] -0.538847931
[103,] -0.004494437
[104,]  0.387341099
[105,]  0.263348661
[106,] -0.132707181
[107,] -1.545004136
[108,] -1.216260789
[109,]  0.167984555
[110,] -0.392624728

$ranks.selected
  [1] 103  55  75  38  96  90  41  92  99  39  84  62  25 106  91  29   6 109
 [19]  87  10  66  35  22  11  31  27 101  24  18 105  64   2  47  60  42  46
 [37]  56  51  14  50  68  71  21   3  73  57   7 104 110  48  78  49   8  98
 [55]  61   4  63  65  20  36   9  82  97 102  12  37  40  76  30  16  85  69
 [73]   1  54   5  28  79  15  95  43  80  59  52  86  44  89  19  13  26  77
 [91] 100  70  53  72  23  58  45  81  32  34 108  83  67  74  93  88 107

$ranks.outliers
[1] 33 17 94

$beta.m
[1]  7.92662347  0.08834236 -0.37144951

$sigma2.biased
[1] 0.4018263

> 
> 
> 
> 
> 
> 
> dev.off()
null device 
          1 
>