R言語の幾何平均数、調和平均数、平方平均数

平方平均数が最も実現しやすい

a  
  
         ，    NA   
 
  
geometry.mean  
  
  ： http://stackoverflow.com/questions/2602583/geometric-mean-is-there-a-built-in
 
  

 
  
    psych     geometric.mean
 
  

 
  
http://personality-project.org/r/html/geometric.mean.html
 
  

 
  
      harmonic.mean,            lmomco  psych
 
  
length(a)/sum(1/a)
  
http://personality-project.org/r/psych/help/harmonic.mean.html 
http://www.inside-r.org/packages/cran/lmomco/docs/harmonic.mean 
library(ggplot2)
library(reshape2)
# Function to calculate the harmonic mean
harmonicMean  
  
  ：
 
  
http://economistatlarge.com/r-guide/arithmetic-harmonic-geometric-means-r