Did some search but couldn't find useful result.
I am trying to read a n*m dimension data with read.table, what i need is a
numeric array,
is there any efficient way to allow me get this array directly instead of a
list?
I tried to use as.array() to change the mode, but seems it doesn't work and
i got this error message:
"Error in "dimnames<-.data.frame"(`*tmp*`, value =
list(function (M) :
invalid dimnames given for data frame "
what's wrong with the dimension names , should i delete them? how can i do
that?
Thanks a lot for any help.
tong wang
maybe you can use the array function,like>array(CO2,dim(CO2),list(rownames(CO2),colnames(CO2)))and matrix is just a specif type of array,so maybe you can use as.matrix>as.matrix(CO2)the above tow,the CO2 is a data.frame which can use read.table to read in. the third way is:use the scan the read the data and use array to change the data to array. On Tue, 28 Jun 2005 01:05:23 -0700 tong wang <wangtong at usc.edu> wrote:> Did some search but couldn't find useful result. > > I am trying to read a n*m dimension data with read.table, what i need is a numeric array, > is there any efficient way to allow me get this array directly instead of a list? > I tried to use as.array() to change the mode, but seems it doesn't work and i got this error message: > > "Error in "dimnames<-.data.frame"(`*tmp*`, value = list(function (M) : > invalid dimnames given for data frame " > > what's wrong with the dimension names , should i delete them? how can i do that? > > Thanks a lot for any help. > > tong wang > > ______________________________________________ > R-help at stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html-- Department of Sociology Fudan University,Shanghai Blog:http://sociology.yculblog.com
Please consult the `R Data Import/Export Manual'. You could be using
scan(), as in
matrix(scan("some_file", 0), nrow=n, byrow=TRUE)
On Tue, 28 Jun 2005, tong wang wrote:
> Did some search but couldn't find useful result.
>
> I am trying to read a n*m dimension data with read.table, what i need is
> a numeric array, is there any efficient way to allow me get this array
> directly instead of a list? I tried to use as.array() to change the
> mode, but seems it doesn't work and i got this error message:
>
> "Error in "dimnames<-.data.frame"(`*tmp*`, value =
list(function (M) :
> invalid dimnames given for data frame "
>
> what's wrong with the dimension names , should i delete them? how can i
do that?
I think you wanted as.matrix here, not as.array: probably the call to the
latter was incorrect, but we were not shown it.
--
Brian D. Ripley, ripley at stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595