Hi,
  I have a microarray data which has about 10000 genes and 15 measurements. The 15 measurements contain 6 control, 3 low dose, 3 medium dose, 3 high dose. If I treat the dose level as a continuous variable, how can I use ANCOVA to do gene selection? (I mean to select those genes that response to different level of doses differently?). Thank you very much!

  James

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