hook_rgl has been moved to the rgl package

inst/examples/knitr-manual.Rnw

@@ -631,9 +631,10 @@ The \textbf{knitr} package is ready for customization. Both the patterns
 and hooks can be customized; see the package website for details.
 Here I show an example on how to save \textbf{rgl} plots \citep{R-rgl}
 using a customized hook function. First we define a hook named \texttt{rgl}
-using the function \emph{hook\_rgl()} in \textbf{knitr}:
+using the function \emph{hook\_rgl()} in \textbf{rgl}:
 
 <<rgl-demo>>=
+library(rgl)
 knit_hooks$set(rgl = hook_rgl)
 head(hook_rgl)  # the hook function is defined as this
 @

inst/examples/knitr-manual.lyx

@@ -1,5 +1,5 @@
-#LyX 2.0 created this file. For more info see http://www.lyx.org/
-\lyxformat 413
+#LyX 2.1 created this file. For more info see http://www.lyx.org/
+\lyxformat 474
 \begin_document
 \begin_header
 \textclass article
@@ -23,13 +23,13 @@ knitr
 \font_roman palatino
 \font_sans lmss
 \font_typewriter lmtt
+\font_math auto
 \font_default_family default
 \use_non_tex_fonts false
 \font_sc true
 \font_osf false
 \font_sf_scale 100
 \font_tt_scale 100
-
 \graphics default
 \default_output_format default
 \output_sync 0
@@ -50,15 +50,24 @@ knitr
 \pdf_quoted_options "pdfstartview={XYZ null null 1}"
 \papersize default
 \use_geometry true
-\use_amsmath 1
-\use_esint 1
-\use_mhchem 1
-\use_mathdots 1
-\cite_engine natbib_authoryear
+\use_package amsmath 1
+\use_package amssymb 1
+\use_package cancel 1
+\use_package esint 1
+\use_package mathdots 1
+\use_package mathtools 1
+\use_package mhchem 1
+\use_package stackrel 1
+\use_package stmaryrd 1
+\use_package undertilde 1
+\cite_engine natbib
+\cite_engine_type authoryear
+\biblio_style plainnat
 \use_bibtopic false
 \use_indices false
 \paperorientation portrait
 \suppress_date false
+\justification true
 \use_refstyle 1
 \index Index
 \shortcut idx
@@ -323,7 +332,7 @@ qplot(speed, dist, data=cars)+geom_smooth()
 \end_layout
 
 \begin_layout Plain Layout
-\begin_inset Caption
+\begin_inset Caption Standard
 
 \begin_layout Plain Layout
 \begin_inset CommandInset label
@@ -2599,7 +2608,7 @@ hook_rgl()
 \emph default
  in 
 \series bold
-knitr
+rgl
 \series default
 :
 \end_layout
@@ -2615,6 +2624,11 @@ status open
 
 \begin_layout Plain Layout
 
+library(rgl)
+\end_layout
+
+\begin_layout Plain Layout
+
 knit_hooks$set(rgl = hook_rgl)
 \end_layout