[BioC] Handling Missing Values

Robert Gentleman rgentlem@jimmy.harvard.edu
Tue, 29 Oct 2002 15:56:29 -0500

On Tue, Oct 29, 2002 at 12:33:17PM -0500, Sundaram, Shyam (NIH/CIT) wrote:
> Hi,
> Couple of  questions regarding the bioconductor packages and the handling of
> missing values.
> 1. Is there a currently an impute function implementation( or likelihood of
> adding an impute function)?

  It is unclear what such a function would do. In most cases one is
  going to have to use some reasonable amount of external information
  to perform imputations. This is possible now.

> 2. Does the exprSet object have a restriction of having missing values in
> the "exprs" slot ?

  Not intentionally (and not that I am aware of). If you have a
  specific example please post it. If you are simply wondering then I
  suggest that you actually try it and find out. There are lots of
  runnable examples that can easily be adjusted to produce missing
  values and without too much effort you can see the answer for


> Thanks
> Shyam
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| Robert Gentleman                 phone : (617) 632-5250                   |
| Associate Professor              fax:   (617)  632-2444                   |
| Department of Biostatistics      office: M1B20
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