signature <- read.delim("D:/project/gaea/signature", header=FALSE)%读取数据
关于read.delim()函数：delim的含义：A delimited text file is one in which each line of text is a record, and the fields are separated by a known character.也就是说一个delimited text file 就是每行为一个记录，每个fields由某字符分割。详细含义详见：read.delim & write.table
查看signature的数据类型
mode(signature)
-[1] "list"
按照signature的某一列排序
t = signature[order(signature$V3),]
输出排序结果
write.table(t,'D:/project/gaea/signature.out',quote = FALSE, sep = '\t', row.names = FALSE)
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