[BioC] matrix row/column displayed as a list

[Daniel Brewer]

Yes I have already tried that, class(expression) is matrix.  But
class(expression[1,]) is list as is class(expression[,1]).  Whereas the
class of my simple constructed matrix when looking at a single row or
column is numeric i.e. class(togo[,2]).

Thanks for the suggestion anyway.

Stephen Henderson wrote:
> Are you sure expression is a matrix?
> What do you get when you type?
> 
>> class(expression)
> 
> have you tried:
> 
>> expression<- as.matrix(expression)
> 
> 
> Stephen Henderson
> Wolfson Inst. for Biomedical Research
> Cruciform Bldg., Gower Street
> University College London
> United Kingdom, WC1E 6BT
> +44 (0)207 679 6827
> 
> 
> -----Original Message-----
> From: bioconductor-bounces at stat.math.ethz.ch
> [mailto:bioconductor-bounces at stat.math.ethz.ch] On Behalf Of Daniel
> Brewer
> Sent: 30 March 2007 14:42
> To: bioconductor at stat.math.ethz.ch
> Subject: [BioC] matrix row/column displayed as a list
> 
> Hi,
> 
> This is a silly little question, but I can't find the answer.  I have a
> matrix of expression values e.g. expression.  When I display either one
> column or one row it displays a list e.g. expression[1,] or
> expression[,1].  Is there a way to change this behaviour?
> 
> When I constructed a test matrix, the matrix worked as desired i.e.
>> togo <- matrix(c(1,2,3,4),ncol=2, nrow=2)
>> togo[,1]
> [1] 1 2
> Why is the behaviour different?
> 
> Many thanks
> 
> Dan

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