[R] Please help....normalization by the median of some control genes

[David Lyon]

Can someone show me some code to do normalization by the median of some control genes for the example below?

Many Many Thanks in advance



This strategy selects a subset of genes (called “control genes”) and makes the median of their data distribution similar across arrays.

        id1    id2    id3
control1    0.8    0.7    0.6
control2    0.6    0.2    0.4
probe1        0.3    0.2    0.5
probe2        0.4    0.9    0.7
probe3        0.6    0.7    0.4