iNEXT: an r package for interpolation and extrapolation species diversity
1. iNEXT : an R package for interpolation and
extrapolation species diversity
種類數的稀釋與預測方法
謝宗震 (Johnson)
2. About me
· 清華統計所
- 研究領域:Statistics,
ecology
and
genetics
· Taiwan R User Group Officer
· Data Science Program 籌備委員
· R 相關作品:
- R package: CARE1 [主要作者], iNEXT
[主要作者], ChaoEntropy, ChaoSpecies
- Shiny app: iNEXT-Online [主要作者], LoL
Champion
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7. 統計方法 — 種類數的稀釋與預測
時,
)m (S
資料中出現的種類數
m
利用樣本數對種類數的稀釋與預測曲線 (rarefaction and extrapolation curve),來描述樣本數為
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8. 8/15
1
n > m fi ])
2
fn
f2
)
n ≤ m fi
)
− 1( − 1 [ 0f +
ˆ
m
n
(
x− n
sb o
S = )m ( S
ˆ
0> i x
∑ −
m
i
sb o S
(
= )m ( S
ˆ
統計學家 (Smith and Grassle 1977, Shen et al. 2003) 得到估計量
1= i
]
) ip − 1 ( − 1[∑ = )m (S
m
S
稀釋與預測函數的期望值 (Good 1953)
統計方法 — 種類數的稀釋與預測(續)
9. R套件 iNEXT
R package iNEXT = mehtod of iNTerpolation and EXTrapolation curve
isalpcae(dvol"
ntl.akgs"etos)
lbaydvol)
irr(etos
isalgtu(iET,"onoHih)
ntl_ihb"NX" Jhsnse"
lbayiET
irr(NX)
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15. 參考文獻
1. Chao, A. 1984. Nonparametric estimation of the number of classes in a population. Scandinavian
Journal of Statistics 11:265-270.
2. Colwell, R. K., A. Chao, N. J. Gotelli, S. Y. Lin, C. X. Mao, R. L. Chazdon, and J. T. Longino.
2012. Models and estimators linking individual-based and sample-based rarefaction,
extrapolation and comparison of assemblages. Journal of Plant Ecology 5:3-21.
3. Hsieh, T. C., K. H. Ma, and A. Chao. 2013. iNEXT online: interpolation and extrapolation
(Version 1.3.0) [Software]. Available from http://chao.stat.nthu.edu.tw/blog/software-download/.
4. Hsieh, T. C., K. H. Ma, and A. Chao. 2013. iNEXT: an R package for interpolation and
extrapolation species diversity. http://johnsonhsieh.github.io/iNEXT/
5. Ramnath V. 2012. slidify: Generate
http://ramnathv.github.com/slidify/
reproducible
html5
slides
from
R
markdown.
6. Taiwan R User Group. 2013. R topic - estimation and prediction of richness. Programmer
magazine 12:48-53. http://programmermagazine.github.io/201312/htm/article6.html
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