Hi All! I have a problem. I want to make an expression plot with the pm and mm intensitys of the genechip. I maked it good, but i want to colored the empty probe set. I have got a mapping vector which has got -1 if the probe set it empty and -2 if it not. Which function sould I use, and how? Thanks a lot! Alm?ssy Bal?zs

23/04/2008 11:10 Almassy Balazs Mihaly a ?crit > Hi All! > I have a problem. I want to make an expression plot with the pm and mm > intensitys of the genechip. I maked it good, but i want to colored the empty > probe set. I have got a mapping vector which has got -1 if the probe set it > empty and -2 if it not. Which function sould I use, and how? > Thanks a lot! Dear Alm?ssy perhaps what you want to achieve can be done by adding something like col=ifelse(mappingvector==-1, "orange", "blue") or col=c("orange", "blue")[-mappingvector] to the arguments of your call to plot. Best wishes Wolfgang ------------------------------------------------------------------ Wolfgang Huber EBI/EMBL Cambridge UK http://www.ebi.ac.uk/huber