File R-bit.spec of Package R-bit
%global packname bit
%global rlibdir %{_libdir}/R/library
Name: R-%{packname}
Version: 1.1_12
Release: 1
Summary: A class for vectors of 1-bit booleans
Group: Development/Libraries/Other
License: GPL-2.0
URL: http://cran.r-project.org/web/packages/%{packname}/index.html
Source0: bit_1.1-12.tar.gz
BuildRoot: %{_tmppath}/%{name}-%{version}-build
Requires: R-base
# Package suggestions
BuildRequires: texlive
BuildRequires: texinfo
BuildRequires: fdupes
#
%if 0%{?suse_version} <= 1220 && 0%{?suse_version} != 1110
BuildRequires: texlive-fonts-extra
%endif
BuildRequires: R-base-devel
BuildRequires: gcc-c++
# Package suggestions, not required to build
#BuildRequires:
%description
bitmapped vectors of booleans (no NAs), coercion from and to logicals,
integers and integer subscripts; fast boolean operators and fast summary
statistics. With 'bit' vectors you can store true binary booleans
{FALSE,TRUE} at the expense of 1 bit only, on a 32 bit architecture this
means factor 32 less RAM and ~ factor 32 more speed on boolean operations.
Due to overhead of R calls, actual speed gain depends on the size of the
vector: expect gains for vectors of size > 10000 elements. Even for
one-time boolean operations it can pay-off to convert to bit, the pay-off
is obvious, when such components are used more than once. Reading from and
writing to bit is approximately as fast as accessing standard logicals -
mostly due to R's time for memory allocation. The package allows to work
with pre-allocated memory for return values by calling .Call() directly:
when evaluating the speed of C-access with pre-allocated vector memory,
coping from bit to logical requires only 70% of the time for copying from
logical to logical; and copying from logical to bit comes at a performance
penalty of 150%. the package now contains further classes for representing
logical selections: 'bitwhich' for very skewed selections and 'ri' for
selecting ranges of values for chunked processing. All three index classes
can be used for subsetting 'ff' objects (ff-2.1-0 and higher).
%prep
%setup -q -c -n %{packname}
%build
%install
mkdir -p %{buildroot}%{rlibdir}
%{_bindir}/R CMD INSTALL -l %{buildroot}%{rlibdir} %{packname}
test -d %{packname}/src && (cd %{packname}/src; rm -f *.o *.so)
rm -f %{buildroot}%{rlibdir}/R.css
%files
%defattr(-, root, root, -)
%dir %{rlibdir}/%{packname}
%doc %{rlibdir}/%{packname}/html
%doc %{rlibdir}/%{packname}/ANNOUNCEMENT-1.0.txt
%doc %{rlibdir}/%{packname}/DESCRIPTION
%doc %{rlibdir}/%{packname}/NEWS
%doc %{rlibdir}/%{packname}/README_devel.txt
%{rlibdir}/%{packname}/INDEX
%{rlibdir}/%{packname}/NAMESPACE
%{rlibdir}/%{packname}/Meta
%{rlibdir}/%{packname}/R
%{rlibdir}/%{packname}/exec
%{rlibdir}/%{packname}/libs
%{rlibdir}/%{packname}/help
%changelog
