help about R install "ISCN/SOCDRaHR2"

[wzh...@gmail.com]

Hi,

I am trying to install R package, install_github("ISCN/SOCDRaHR2").

 I am following the instruction that:

To quickly access ISCN3 data:

library(devtools) 

install_github("ISCN/SOCDRaHR2") 

ibrary(SOCDRaH2)

  ISCN3 <- ISCN3(dataDir='YourDataDir')

but when I do install_github("ISCN/SOCDRaHR2"), there is error. 

Error in ---readBuell2011 <- function(data_dir, download = TRUE, verbose = FALSE) { : 

  object 'readBuell2011' not found

Error: unable to load R code in package ‘SOCDRaH2’

Anybody can help me fix this? 

thank you so much.

zhuonan warng