ov.cgh {Oncotree} | R Documentation |
This is a data set obtained using the comparative genomic hybridization technique (CGH) on samples from papillary serous cystadenocarcinoma of the ovary. Only the seven most commonly occurring events are given.
data(ov.cgh)
A data frame with 87 observations on the following 7 variables.
8q+
3q+
5q-
4q-
8p-
1q+
Xp-
The CGH technique uses fluorescent staining to detect abnormal (increased or decreased) number of DNA copies. Often the results are reported as a gain or loss on a certain arm, without further distinction for specific regions. It is common to denote a change in DNA copy number on a specific chromosome arm by prefixing a “-” sign for decrease and a “+” for increase. Thus, say, -3q denotes abnormally low DNA copy number on the q arm of the 3rd chromosome.
http://www.ncbi.nlm.nih.gov/sky/
data(ov.cgh) heatmap(data.matrix(ov.cgh), Colv=NA, scale="none", col=c("gray90","red"))