Obrigado pela atenção Walmes.

Estou usando o seguinte código no R:

library(odfWeave)
odfWeave("Fonte.odt","Saida.odt")

onde o arquivo Fonte.odt tem o seguinte código:

<<cemNumeros, echo=FALSE>>=

cemNumeros<-round(rnorm(10,74,2.34))

summary(cemNumeros)

@

Não usei aspas neste código. o log da função aplicada é:

Copying  Fonte.odt 
  Setting wd to  C:\Users\DIOGO\AppData\Local\Temp\Rtmp4qATRq/odfWeave24193047992 
  Unzipping ODF file using unzip -o "Fonte.odt" 
Archive:  Fonte.odt
 extracting: mimetype                
   creating: Configurations2/statusbar/
  inflating: Configurations2/accelerator/current.xml  
   creating: Configurations2/floater/
   creating: Configurations2/popupmenu/
   creating: Configurations2/progressbar/
   creating: Configurations2/toolpanel/
   creating: Configurations2/menubar/
   creating: Configurations2/toolbar/
   creating: Configurations2/images/Bitmaps/
  inflating: content.xml             
  inflating: manifest.rdf            
  inflating: styles.xml              
 extracting: meta.xml                
 extracting: Thumbnails/thumbnail.png  
  inflating: settings.xml            
  inflating: META-INF/manifest.xml   

  Removing  Fonte.odt 
  Creating a Pictures directory

  Pre-processing the contents
  Sweaving  content.Rnw 

  Writing to file content_1.xml
  Processing code chunks ...
    1 : term verbatim(label=cemNumeros)

  'content_1.xml' has been Sweaved

  Removing content.xml

  Post-processing the contents
  Removing content.Rnw 
  Removing styles.xml
  Renaming styles_2.xml to styles.xml
  Removing manifest.xml
  Renaming manifest_2.xml to manifest.xml
  Removing extra files

  Packaging file using zip -r "Fonte.odt" . 
  adding: Configurations2/ (164 bytes security) (stored 0%)
  adding: Configurations2/accelerator/ (164 bytes security) (stored 0%)
  adding: Configurations2/accelerator/current.xml (164 bytes security) (stored 0%)
  adding: Configurations2/floater/ (164 bytes security) (stored 0%)
  adding: Configurations2/images/ (164 bytes security) (stored 0%)
  adding: Configurations2/images/Bitmaps/ (164 bytes security) (stored 0%)
  adding: Configurations2/menubar/ (164 bytes security) (stored 0%)
  adding: Configurations2/popupmenu/ (164 bytes security) (stored 0%)
  adding: Configurations2/progressbar/ (164 bytes security) (stored 0%)
  adding: Configurations2/statusbar/ (164 bytes security) (stored 0%)
  adding: Configurations2/toolbar/ (164 bytes security) (stored 0%)
  adding: Configurations2/toolpanel/ (164 bytes security) (stored 0%)
  adding: content.xml (164 bytes security) (deflated 97%)
  adding: manifest.rdf (164 bytes security) (deflated 54%)
  adding: META-INF/ (164 bytes security) (stored 0%)
  adding: META-INF/manifest.xml (164 bytes security) (deflated 83%)
  adding: meta.xml (164 bytes security) (deflated 56%)
  adding: mimetype (164 bytes security) (stored 0%)
  adding: Pictures/ (164 bytes security) (stored 0%)
  adding: settings.xml (164 bytes security) (deflated 84%)
  adding: styles.xml (164 bytes security) (deflated 92%)
  adding: Thumbnails/ (164 bytes security) (stored 0%)
  adding: Thumbnails/thumbnail.png (164 bytes security) (deflated 31%)
  Copying  Fonte.odt 
  Resetting wd
  Removing  C:\Users\DIOGO\AppData\Local\Temp\Rtmp4qATRq/odfWeave24193047992


Fiz as alterações que sugeriste mas infelizmente não funfou. As versões são BrOffice 3.3 e LibreOffice 3.5.
--
///\\\///\\\///\\\///\\\///\\\///\\\///\\\///\\\
Diogo Braga Mendes
Bacharel em Estatística, CONRE 9558
Fone: (91) 8239-7799
///\\\///\\\///\\\///\\\///\\\///\\\///\\\///\\\
“O âmago da ciência, que sempre se apresenta como a mais importante no que refere a resultados práticos, é a pesquisa altamente teórica e abstrata, nascida da infatigável curiosidade, flexibilidade e força da razão humana”
Andrei Sakharov In Análise Harmônica de Processos Estocásticos