#11436: Fix R reading files
--------------------------+-------------------------------------------------
Reporter: kcrisman | Owner: was
Type: defect | Status: new
Priority: major | Milestone: sage-4.7.1
Component: interfaces | Keywords:
Work_issues: | Upstream: N/A
Reviewer: | Author:
Merged: | Dependencies:
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The current way we configure the R Pexpect interface is to have a 1024
character cutoff to trying to read from a file.
Problem: this doesn't actually seem to work.
{{{
sage: s = 'matrix(c(1, 1, 1, 1,' + ' '*987 + '2,2,2,2), ncol=4)'
sage: len(s)
1024
sage: r.eval(s)
' [,1] [,2] [,3] [,4]\n[1,] 1 1 2 2\n[2,] 1 1
2 2'
sage: s = 'matrix(c(1, 1, 1, 1,' + ' '*988 + '2,2,2,2), ncol=4)'
sage: len(s)
1025
sage: r.eval(s)
''
}}}
jhpalmieri helped track this down. See [http://groups.google.com/group
/sage-support/browse_thread/thread/daa01227a8c4865d this sage-support
thread] for more details.
Helpful links:
* [http://rss.acs.unt.edu/Rdoc/library/base/html/source.html doc for R
source command]
* [http://rss.acs.unt.edu/Rdoc/library/base/html/connections.html doc for
R file command(s)]
It seems like everything is creating files as should be, and using the
verbose option to source shows that at least something's being computed,
but the result is not showing up in Sage, possibly due to misuse of
"source", or "file".
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11436>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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