R的merge用法（2018-06-05） R的merge用法（2018-06-05）

R语言-merge函数
merge函数的声明:
merge( x, y, by = intersect(names(x), names(y)),
by.x = by, by.y = by, all = FALSE, all.x = all, all.y = all,
sort = TRUE, suffixes = c(".x",".y"),
incomparables = NULL, ...）

#merge过程中两个文件匹配行一致，不然会报错。DF1<-read.csv("lyr/rna-seq/blast/geneID/gene.csv") #读取gene.csv DF2<-read.csv("lyr/rna-seq/blast/geneID/db_blast3.csv") #读取db_blast3.csv dim(DF1) #看一下表格维度 dim(DF2) merge(DF1,DF2,by ="RNA_nucleotide_accession.version", all.y = TRUE) data1<-(merge(DF1,DF2,by ="RNA_nucleotide_accession.version", all.y = TRUE)) #将merge结果写道data中 write.csv(data1, file = "result_data.csv", quote = FALSE, row.names = FALSE) #输出文件为result_data.csv

【R的merge用法（2018-06-05）】接着看result_data.csv中基因的功能。