[BioC] labeling affy histogram

James W. MacDonald jmacdon at med.umich.edu
Wed Aug 18 16:08:00 CEST 2010

Hi Andrew,

On 8/18/2010 9:14 AM, Andrew Einhorn wrote:
> I am using the affy package to plot a histogram of raw data from an
> affymetrix dataset.
> Data<- ReadAffy()
> hist(Data[,1:4])

You need to look at ?legend. And you need to control the line type and 
color of the samples in your call to hist().

An example:

 > library(affydata)
 > data(Dilution)
 > hist(Dilution, col=1:4, lty=1)
 > legend("topright", inset = 0.01, legend = row.names(pData(Dilution)), 



> The histogram plots fine but I'd like to attach a legend to the plot, or at
> least label the plot-lines somehow.  At present there is no way to discern
> which of the four lines corresponds to which sample.
> 	[[alternative HTML version deleted]]
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James W. MacDonald, M.S.
Douglas Lab
University of Michigan
Department of Human Genetics
5912 Buhl
1241 E. Catherine St.
Ann Arbor MI 48109-5618
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