Re: [R] Smart way to check if a column with certain name exists in a data.frame

try: 'x' %in% colnames(df) hth, Kingsford On Mon, Jun 22, 2009 at 9:17 PM, R_help Help wrote: > Hi, > > I have a matrix or data.frame (df). When I would like to check if a column > named "x" exists, it becomes my habit to do the following: > > if (length(which(colnames(df)=="x"))>0) > > Is there

[R] Smart way to check if a column with certain name exists in a data.frame

Hi, I have a matrix or data.frame (df). When I would like to check if a column named "x" exists, it becomes my habit to do the following: if (length(which(colnames(df)=="x"))>0) Is there any smarter way to do this? Thank you. adschai [[alternative HTML version deleted]] __