[Rcpp-commits] r1710 - pkg/Rcpp

[noreply at r-forge.r-project.org]

Author: romain
Date: 2010-06-24 12:47:23 +0200 (Thu, 24 Jun 2010)
New Revision: 1710

Modified:
   pkg/Rcpp/NEWS
Log:
update the NEWS about sugar

Modified: pkg/Rcpp/NEWS
===================================================================
--- pkg/Rcpp/NEWS	2010-06-24 10:46:09 UTC (rev 1709)
+++ pkg/Rcpp/NEWS	2010-06-24 10:47:23 UTC (rev 1710)
@@ -1,33 +1,33 @@
 0.8.3   (under development)
 
-	o	This release adds Rcpp sugar which brings (a subset of) the R syntax
-		into C++. This supports : 
-		- binary operators : <,>,<=,>=,==,!= between R vectors
-		- arithmetic operators: +,-,*,/ between compatible R vectors
-		- several functions that do similar as the R function of the same name:
-		abs, all, any, ceiling, diff, exp, ifelse, is_na, lapply, pmin, pmax, 
-		pow, sapply, seq_along, seq_len, sign
-		
-		Simple examples :
-		
-		// two numeric vector of the same size
-		NumericVector x ;
-		NumericVector y ;
-		NumericVector res = ifelse( x < y, x*x, -(y*y) ) ;
-		
-		// sapply'ing a C++ function
-		double square( double x ){ return x*x ; }
-		NumericVector res = sapply( x, square ) ;
-		
-		Rcpp sugar uses the technique of expression templates, pioneered by the 
-		Blitz++ libraray and used in many libraries (Boost::uBlas, Armadillo). 
-		Expression templates allow lazy evaluation of expressions, which 
-		coupled with inlining generates very efficient code, very closely 
-		approaching the performance of hand written loop code, and often
-		much more efficient than the equivalent (vectorized) R code.
-		
-		Rcpp sugar is curently limited to vectors, future releases will 
-		include support for matrices with sugar functions such as outer, etc ...
+    o	This release adds Rcpp sugar which brings (a subset of) the R syntax
+        into C++. This supports : 
+        - binary operators : <,>,<=,>=,==,!= between R vectors
+        - arithmetic operators: +,-,*,/ between compatible R vectors
+        - several functions that do similar as the R function of the same name:
+        abs, all, any, ceiling, diff, exp, ifelse, is_na, lapply, pmin, pmax, 
+        pow, sapply, seq_along, seq_len, sign
+        
+        Simple examples :
+        
+        // two numeric vector of the same size
+        NumericVector x ;
+        NumericVector y ;
+        NumericVector res = ifelse( x < y, x*x, -(y*y) ) ;
+        
+        // sapply'ing a C++ function
+        double square( double x ){ return x*x ; }
+        NumericVector res = sapply( x, square ) ;
+        
+        Rcpp sugar uses the technique of expression templates, pioneered by the 
+        Blitz++ libraray and used in many libraries (Boost::uBlas, Armadillo). 
+        Expression templates allow lazy evaluation of expressions, which 
+        coupled with inlining generates very efficient code, very closely 
+        approaching the performance of hand written loop code, and often
+        much more efficient than the equivalent (vectorized) R code.
+        
+        Rcpp sugar is curently limited to vectors, future releases will 
+        include support for matrices with sugar functions such as outer, etc ...
 
     o   New helper function so that "Rcpp?something" brings up Rcpp help