[R] artificial data matrix with 100000 rows

[Martin Maechler]

>>>>> "PS" == Paul Smith <phhs80 at gmail.com>
>>>>>     on Sun, 9 Sep 2007 12:17:32 +0100 writes:

    PS> On 9/9/07, kevinchang <shukai at seas.upenn.edu> wrote:
    >> I tried to made the matrix with this size by either matrix() or array().
    >> However, there seems to be default limit of number for rows made. I got sort
    >> of error message from R .To be specific,
    >> 
    >> m<--matrix(ncol=3,nrow=100000)
    >> 
    >> error message:[ reached getOption("max.print") -- omitted 66667 rows ]]
    >> 
    >> or
    >> 
    >> a<-array(dim=c(10000,3,10))
    >> 
    >> error message:reached getOption("max.print") -- omitted 6667 row(s) and 6
    >> matrix slice(s) ]

    PS> That is not an error message, I guess. 

Definitely not,
thank you, Paul!

Also, they were not produced by what Kevin showed (namely assignments)
but rather when he *prints* the contents of his huge matrix /
array.

    PS> When the matrices are huge, R is unable to print them
    PS> totally on the screen, but all data are present.

Not at all "unable" !!
R protects you from accidentally overflowing your "console" with
huge amount of non-sensical output.

As the warning above mentions,
you should look at
  ? getOption
  ? options
and particularly the  'max.print'  option

Is  '' reached  getOption("max.print") '' 
too difficult to read?

You *can* increase the 'max.print' option as much as you like,
and that's why I said     'not at all "unable"'   above.

Regards,
Martin

    PS> For instance,

    >> m[(nrow(m)-10):nrow(m),]
    PS> [,1] [,2] [,3]
    PS> [1,]   NA   NA   NA
    PS> [2,]   NA   NA   NA
    PS> [3,]   NA   NA   NA
    PS> [4,]   NA   NA   NA
    PS> [5,]   NA   NA   NA
    PS> [6,]   NA   NA   NA
    PS> [7,]   NA   NA   NA
    PS> [8,]   NA   NA   NA
    PS> [9,]   NA   NA   NA
    PS> [10,]   NA   NA   NA
    PS> [11,]   NA   NA   NA

or rather just

   tail(m)

or tail(m, 11)
or head(m)

or str(m)

etc etc

    PS> See

    PS> ?getOption

yes indeed.
Martin

    PS> Paul