jitter()函数的使用

jitter()函数：对数值向量添加一个小的噪音量。

jitter(x,factor=1,amount=NULL)

·x：数值变量，需要加入噪音的数值向量；

·factor：数值型；

·amount：

例：

> round(jitter(c(rep(1,3),rep(1.2,4),rep(3,3))),3)
 [1] 0.995 1.017 1.032 1.201 1.200 1.164 1.180 3.023 2.976 3.030
> jitter(rep(0,7))
[1] -0.0054272884 -0.0092020010  0.0035989811 -0.0133819767 -0.0004372087
[6]  0.0185353459  0.0031841173
> jitter(rep(0,7))
[1]  0.011631916  0.003153848  0.001674986  0.010502867 -0.014309786 -0.004305730  0.012148331
> jitter(rep(10000,5))
[1] 10179.605  9815.381 10067.678  9865.233  9846.532
> jitter(rep(10000,5))
[1]  9852.969  9956.410  9886.297 10078.813  9862.851
> jitter(rep(10000,5))
[1]  9936.206  9933.250 10053.980  9962.283 10067.200
> jitter(rep(10000,5))
[1] 10198.031 10161.518  9936.120  9902.919  9928.875
> jitter(rep(10000,5))
[1]  9997.306  9807.569  9914.049 10063.483  9851.937
> jitter(rep(10000,5))
[1]  9846.340  9812.892  9915.440 10031.004  9815.422
> jitter(rep(10000,5))
[1] 10090.507 10158.549 10095.456  9962.090  9832.906
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