[BioC] matrix row/column displayed as a list

[Seth Falcon]

Daniel Brewer <daniel.brewer at icr.ac.uk> writes:

> 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?

I think you mean that it displays a vector.  I think you will find
help by reading help("[") and looking at the 'drop' argument.

togo <- matrix(c(1,2,3,4),ncol=2, nrow=2)
> togo[1, ]
[1] 1 3
> togo[1, , drop=FALSE]
     [,1] [,2]
[1,]    1    3

+ seth

-- 
Seth Falcon | Computational Biology | Fred Hutchinson Cancer Research Center
http://bioconductor.org