[BioC] Image() - Question

Rafael A. Irizarry rafa@jhu.edu
Mon, 17 Feb 2003 08:39:49 -0500 (EST)

if ab is an AffyBatch object you can type

image(ab,transfo=NULL) ## or
image(ab,tranfo=function(x) x)

to see all arrays in the batch in linear scale.

alternatlvely, you can type image(ab[[i])) to see array i.
ab[[i]] is a Cel object (a lower level class). image(ab[[i]]) calls the
imaging function for Cels. image(ab) is a wrapper for batches, that
include the log as the tranformation. log is more popular than linear so,
on average, it saves keystrokes.

On Fri, 14 Feb 2003, Sundaram, Shyam (NIH/CIT) wrote:

> Hi :
> I recently uploaded a HGU 133A cel file and generated the image file using
> te AffyBatch method. I had the following questions.
> 1. What is the scaling on the image ( I got 700 on the X and the Y) ? How is
> this scaling done ? 
> 2. How do i turn off the log scaling?
> Thanks
> Shyam
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