12-10-2008
It is possible that your script has defined the variable "value" as an integer (typeset -i value). The shell integer variables cannot hold very large numbers. Just hold them in a character field. Also, most versions of "expr" cannot deal with very large numbers.
To ensure that your variable "value" is a character variable "unset" it.
size=1000000
unset value
value=`echo "$size * (1024 ^ 6)"|bc`
echo $value
1152921504606846976000000
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LEARN ABOUT DEBIAN
rscript
Rscript(1) FSF Rscript(1)
NAME
Rscript - front end for scripting with R
SYNOPSIS
Rscript [--options] [-e expr] file [args]
DESCRIPTION
A binary front-end to R, for use in scripting applications.
expr An optional expression to be evaluated, used in place of expr.
file Input file of R expressions
args Optional further arguments to be processed by commandArgs in the R interpreter.
OPTIONS
--options accepted are
--help Print usage and exit
--version
Print version and exit
--verbose
Print information on progress
--default-packages=list
Where 'list' is a comma-separated set of package names, or 'NULL'
and also options to R (in addition to --slave --no-restore), such as
--save Do save workspace at the end of the session
--no-environ
Don't read the site and user environment files
--no-site-file
Don't read the site-wide Rprofile
--no-init-file
Don't read the user R profile
--restore
Do restore previously saved objects at startup
--vanilla
Combine --no-save, --no-restore, --no-site-file --no-init-file and --no-environ
SEE ALSO
R(1)
R scripting April 2007 Rscript(1)