将表示由for循环生成的变量的字符串向量用作函数调用中的变量

Question

我想使用字符串向量中的变量名称在R中调用function()。在我的特定情况下，我使用了for循环来生成编号的变量名称。例如：

    for (i in 1:3) {
        assign(paste0("x",i),"value")
    }
    v <- paste0("x",c(1,2,3))

    function(v) #Here I would like to call function with variables defined in for loop.

背景： 我有一个数据框，可以通过不同的条件（控件，案例）进行过滤。生成的向量将变成Grange对象，并保存为变量或另存为目录的字符串向量。然后，我想使用相同数量的Grange对象和路径调用IDRfilterN3()。该函数需要3个Grange对象和3个路径。

下面是具体示例：

for (i in unique(samples$Treatment)){
  ind <- samples$Treatment == i
  for (j in samples$Replicate[ind]){
    assign(paste0("peaks_",i,"_",j),toGRanges(file.path(samples$Peaks[ind][j]),format = "MACS2")) 
    assign(paste0("bam_",i,"_",j),file.path(samples$bamReads[ind][j])) 
  }
  if(length(samples$Replicate[ind])==3) assign(paste0("peaks_",i,".idr"),IDRfilterN3(paste0("peaks_",i,"_",c(1,2,3)),paste0("bam_",i,"_",c(1,2,3))))
  else print("Sample size not applicable. IDR failed!")
}

这是示例工作表的示例和我需要执行的步骤：

    ids <- paste0("ID",c(1,2,3,4))    
    condition <- c(rep("A",2),rep("B",2))
    replicate <- c(1,2,1,2)
    pathA <- paste0("/dir/sample_",c(1,2,3,4))
    pathB <- paste0("/dir/sample_",c(1,2,3,4),".bam")
    d <- data.frame(ids,condition,replicate,pathA,pathB)

    #Generate variable storing Grange object out of pathA path for each condition and replicate:
    peakA1 <- toGRanges("/dir/sample_1")
    peakA2 <- toGRanges("/dir/sample_2")
    peakB1 <- toGRanges("/dir/sample_3")
    peakB2 <- toGRanges("/dir/sample_4")

    #Call IDR function for each condition (A, B) using the replicate variables and the path from column pathB
    IDRfilterN3(peakA1, peakA2, "/dir/sample_1.bam", "/dir/sample_2.bam")
    IDRfilterN3(peakB1, peakB2, "/dir/sample_3.bam", "/dir/sample_4.bam")

感谢您的输入。