r - 应用于 biostrings 包函数的 BSgenome 数据加载问题

Question

我安装了 BSgenome 似乎工作但我无法加载库。以下代码来自 Biostrings 包

     > require(BSgenome) 
     > require(Biostrings)      
    >    library(BSgenome.Dmelanogaster.UCSC.dm3)
    Error in library(BSgenome.Dmelanogaster.UCSC.dm3) : 
      there is no package called 'BSgenome.Dmelanogaster.UCSC.dm3'
    >   subject <- Dmelanogaster$chr3R
    Error: object 'Dmelanogaster' not found
    >   Lpattern <- "AGCTCCGAG"
    >   Rpattern <- "TTGTTCACA"
    >   matchLRPatterns(Lpattern, Rpattern, 500, subject) # 1 match
    Error in function (classes, fdef, mtable)  : 
      unable to find an inherited method for function "matchLRPatterns", for signature "standardGeneric"

我会感谢你的帮助。你能在你的电脑上试试看这是否适合你吗？什么可能是潜在的问题。

Answer 1

感谢 Roman Lustrik，以下代码有效：

source("bioconductor.org/biocLite.R";) 
biocLite("BSgenome.Dmelanogaster.UCSC.dm3") 
library(BSgenome.Dmelanogaster.UCSC.dm3) 
subject <- Dmelanogaster$chr3R 
Lpattern <- "AGCTCCGAG" 
Rpattern <- "TTGTTCACA" 
matchLRPatterns(Lpattern, 
Rpattern, 500, subject) # 1 match