Re: [R] how to match or merge data.frames in this case...

PROTECTED] > Sent: quinta-feira, 4 de Setembro de 2008 1:28 > To: [EMAIL PROTECTED] > Subject: Re: [R] how to match or merge data.frames in this case... > > > I'm trying to match two data frames in order to replace the boundary > values > > in a dataframe.1 with

[R] how to match or merge data.frames in this case...

Hi, I'm trying to match two data frames in order to replace the boundary values in a dataframe.1 with values in dataframe.2 ONLY where the pair id1 id2 matches between the two data frames. Eg. > dataframe.1 ... id1 id2 boundary 3307 1095 1108 438.691 3308 1095 1109 438.691 3309 1095 1121 4