a newbie seeking for a simple problem
As df2 has only one column and is thus effectively a variable in this case, you don't even need to merge. df1[df1$gene_name%in%df2$gene_name , ] should do. HTH, Daniel wong, honkit (Stephen) wrote
Dear Experienced R users, I have a looks-like simple but complicated problem urgently needed to be solved. Below is the detail: I have two dataframes, df1, df2. df1 contains two column and many thousands rows: column 1 is a "gene_name", column 2 is "value". df2 contains only one column which is "gene_name" with couple hundred rows. I want to change "value" of df2 for those "gene_name" also appear in df2 "gene_name". How to do that? Millions thanks. Ste
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