Hi, I'm using the affy libraries, and I've got a strange issue: Apparently at random(or at least, I've not worked out the pattern yet) I am getting probenames back as "1007_at", or as "X1007.at". Has anyone else seen this, and if so, can they help me work out what the devil is going on? Crispin -------------------------------------------------------- This email is confidential and intended solely for the use of th... {{dropped}}

> Hi, > I'm using the affy libraries, and I've got a strange issue: > > Apparently at random(or at least, I've not worked out the pattern yet) I am getting probenames back as "1007_at", or as "X1007.at". Has anyone else seen this, and if so, can they help me work out what the devil is going on? > Crispin I don't believe anything random is happening here. In some contexts when R has to treat a token beginning with a number as a possible identifier, it will a) prepend "X" and b) change underscores to periods. The latter will probably disappear as the old interpretation of underscore as assignment disappears. Tell us more about exactly what you are doing when you encounter these changes and we can help more.

Whenever R treat the probe names as the column names, it turns something like "1007_at" to "X1007.at". I think that's what's happening here. ...Tao > Hi, > I'm using the affy libraries, and I've got a strange issue: > > Apparently at random(or at least, I've not worked out the pattern yet) I am getting probenames back > as "1007_at", or as "X1007.at". Has anyone else seen this, and if so, can they help me work out what > the devil is going on? > Crispin