Off topic:Normalize Cel Files And Identify Differentially Expressed Genes (I.E.Down-Regulated) In Tumor Samples

Question

[User 6686]

BioStar Groups

Hi, I would like to identify differentially expressed genes in tumor samples of GSE11024 and later do clustering (k-means) for down-regulated genes. When I tried to boxplot the exprs(eset) there was an error message. Could you help me solving this error. I would be glad and highly appreciate for your kindness.

An error less than x [! Xna]: object of type 'S4' is not subsettable Additional Information: Warning messages:

1: In is.na(x) : is.na() applied to non-(list or vector) of type 'S4' 2: In is.na(x) : is.na() applied to non-(list or vector) of type 'S4' >

Warm regards, Haobijam SNU, Seoul KOREA