R/minitab.R

In foreign: Read Data Stored by 'Minitab', 'S', 'SAS', 'SPSS', 'Stata', 'Systat', 'Weka', 'dBase', ...

### This file is part of the `foreign' package for R.

###
###             Read stored Minitab worksheets
###
### Copyright 1999-2000 Douglas M. Bates <bates$stat.wisc.edu>,
###                     Saikat DebRoy <saikat$stat.wisc.edu>
###
### This file is part of the `foreign' library for R and related languages.
### It is made available under the terms of the GNU General Public
### License, version 2, or at your option, any later version,
### incorporated herein by reference.
###
### This program is distributed in the hope that it will be
### useful, but WITHOUT ANY WARRANTY; without even the implied
### warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
### PURPOSE.  See the GNU General Public License for more
### details.
###
### You should have received a copy of the GNU General Public
### License along with this program; if not, a copy is available at
### http://www.r-project.org/Licenses/

## Files in the Minitab portable worksheet format represent numbers in a
## fixed format (written in Fortran as 5e15.9 or something like that) but
## the data values are only stored in Minitab in single precision.  We use
## signif to remove the inaccuracies in the representation in the files.

"read.mtp" <-
function (file) {
    clean <- function(x) if(is.numeric(x)) signif(x, 6L) else x
    val <- .Call(read_mtp, file)
    lapply(val, clean)
}