我正在逐行读取文件,然后将特定行添加到数据框中。这是我将添加到数据框中的一行示例:
ATOM 230 CA GLU A 31 66.218 118.140 2.411 1.00 31.82 C
我已经验证我的检查没问题,我认为这与我的 rbind 命令特别有关。谢谢你的帮助!
编辑:错误如下,数据框的输出为:
Residue AtomCount SideChain XCoord YCoord ZCoord
2 MET 1 A 62.935 97.579 30.223
21 <NA> 2 A 63.155 95.525 27.079
3 <NA> 3 A 65.289 96.895 24.308
似乎它不再拿起残留物的名称了..
我正在使用的代码是:
get.positions <- function(sourcefile, chain_required = "A"){
positions = data.frame()
visited = list()
filedata <- readLines(sourcefile, n= -1)
for(i in 1: length(filedata)){
input = filedata[i]
id = substr(input,1,4)
if(id == "ATOM"){
type = substr(input,14,15)
if(type == "CA"){
#if there are duplicates it takes the first one
residue = substr(input,18,20)
type_of_chain = substr(input,22,22)
atom_count = strtoi(substr(input, 23,26))
if(atom_count >=1){
if(type_of_chain == chain_required && !(atom_count %in% visited) ){
position_string = trim(substr(input,30,54))
position_string = lapply(unlist(strsplit(position_string," +")),as.numeric)
positions<- rbind(positions, list(residue, atom_count, type_of_chain, position_string[[1]], position_string[[2]], position_string[[3]]))
}
}
}
}
}
return (positions)
}