[Rcpp-commits] r3741 - pkg/RcppCNPy/vignettes
noreply at r-forge.r-project.org
noreply at r-forge.r-project.org
Tue Aug 21 16:55:24 CEST 2012
Author: edd
Date: 2012-08-21 16:55:24 +0200 (Tue, 21 Aug 2012)
New Revision: 3741
Modified:
pkg/RcppCNPy/vignettes/RcppCNPy-intro.Rnw
Log:
correct typos
Modified: pkg/RcppCNPy/vignettes/RcppCNPy-intro.Rnw
===================================================================
--- pkg/RcppCNPy/vignettes/RcppCNPy-intro.Rnw 2012-08-21 02:53:27 UTC (rev 3740)
+++ pkg/RcppCNPy/vignettes/RcppCNPy-intro.Rnw 2012-08-21 14:55:24 UTC (rev 3741)
@@ -73,11 +73,11 @@
\proglang{Python}\footnote{\url{http://www.python.org}} is a widely-used
programming language. It is deployed for use cases ranging from simple
scripting to larger-scale application development. \Python is also popular
-for quantitative and scientific application due to the existenve of extension
+for quantitative and scientific application due to the existence of extension
modules such as \pkg{NumPy}\footnote{\url{http://numpy.scipy.org/}} (which is
shorthand for Numeric Python).
-\pkg{NumPy} can be used for $N$-dimenional arrays, and provides an efficient
+\pkg{NumPy} can be used for $N$-dimensional arrays, and provides an efficient
binary storage model for these files. In practice, $N$ is often equal to
two, and matrices processed or generated in \Python can be stored in this
form.
@@ -157,7 +157,7 @@
matrices and higher-dimensional arrays: a matrix constructed from a single
sequence has its first consecutive elements in its first row---whereas \Rns,
following the \proglang{C} convention, has these first few values in its first
-column. This shows that to go back and forth we need to tranpose these
+column. This shows that to go back and forth we need to transpose these
matrices (which represented internally as two-dimensional arrays).
\subsection{Data reading in \R}
@@ -320,7 +320,7 @@
\section{Performance}
The \R script \code{timing} in the \code{demo/} directory of package
-\pkg{RcppCNPy} provides a sinple benchmark. Given two values $n$ and $k$, a
+\pkg{RcppCNPy} provides a simple benchmark. Given two values $n$ and $k$, a
matrix of size $n \times k$ is created with $n$ rows and $k$ columns. It is
written to temporary files in
% \begin{enumerate}
@@ -336,7 +336,7 @@
Table~\ref{tab:benchmark} shows some timing comparisons for a matrix with
five million elements. Reading the \code{npy} is clearly fastest as it
required only parsing of the header, followed by a single large binary read
-(and the tranpose required to translate the representation used by \Rns). The
+(and the transpose required to translate the representation used by \Rns). The
compressed file requires only one-fourth of the disk space, but takes
approximately 2.5 times as long to read as the binary stream has be
transformed. Lastly, the default ascii reading mode is clearly by far the
@@ -357,7 +357,7 @@
\end{small}
\caption{Performance comparison of data reads using a matrix of size
$10^5 \times 50$. File size are 39.7mb for ascii, 40.0mb for npy and
- 10.8mb for npy.gz. Ten replications were performaned, and total times
+ 10.8mb for npy.gz. Ten replications were performed, and total times
are shown.}
\label{tab:benchmark}
\end{center}
More information about the Rcpp-commits
mailing list