Dear all,
I want to use Regression tree and Lowess methods for calculating ecological threshold. but I don't know that what codes did I use to get P value. 
Thanks for your time, best wishes. 


2011-10-12 



刘朔孺
水生昆虫与溪流生态实验室
植保学院
南京农业大学
江苏 南京 卫岗路1号 

 
Liu Shouru
Department of Entomology
Nanjing Agricultural University
Nanjing, Jiangsu Province 210095
P. R. China

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