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R > データ操作 > ノイズの付加 > jitter()

Last updated at Posted at 2016-09-22
動作環境
RStudio 0.99.903 on Windows 7 pro
R version 3.3.1

R機能マップ http://qiita.com/7of9/items/0f911bcb95d3a8bbd703

サンプルデータを作っているとノイズを足したくなる。

jitter()というのがあるようだ。

参考 https://stat.ethz.ch/R-manual/R-devel/library/base/html/jitter.html

やってみた。

> x<-1:10
> y<-jitter(x, factor=10)
> plot(y)

直線データにノイズが足された。

qiita.png

ノイズ付加したデータをlsfit()で見てみた。

> z<-lsfit(1:10,y)
> z
$coefficients
  Intercept           X 
0.006796537 1.038853321 

$residuals
 [1] -1.49509932  0.48895678 -0.42771788  0.04735133
 [5]  1.10582436  1.39600966  0.75062550 -0.98962267
 [9]  0.86836521 -1.74469297

$intercept
[1] TRUE

$qr
$qt
 [1] -18.0897771   9.4358539  -0.1731444   0.3756662
 [5]   1.5078805   1.8718072   1.3001643  -0.3663425
 [9]   1.5653867  -0.9739301

$qr
       Intercept            X
 [1,] -3.1622777 -17.39252713
 [2,]  0.3162278   9.08295106
 [3,]  0.3162278   0.15621147
 [4,]  0.3162278   0.04611510
 [5,]  0.3162278  -0.06398128
 [6,]  0.3162278  -0.17407766
 [7,]  0.3162278  -0.28417403
 [8,]  0.3162278  -0.39427041
 [9,]  0.3162278  -0.50436679
[10,]  0.3162278  -0.61446316

$qraux
[1] 1.316228 1.266308

$rank
[1] 2

$pivot
[1] 1 2

$tol
[1] 1e-07

attr(,"class")
[1] "qr"
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