head(s, 12)# using the Dlist print() method

__CF_USER_TEXT_ENCODING
                   0x1F5:0x0:0x0
Apple_PubSub_Socket_Render
                   /private/tmp/com.apple.launchd.3MecAID1KO/Render
CLICOLOR_FORCE     1
DISPLAY            :0
DYLD_FALLBACK_LIBRARY_PATH
                   /Library/Frameworks/R.framework/Resources/lib:/Users/atang148/lib:/usr/local/lib:/usr/lib:::/lib:/Library/Java/JavaVirtualMachines/jdk-11.0.1.jdk/Contents/Home/lib/server
EDITOR             vi
GIT_ASKPASS        rpostback-askpass
HOME               /Users/atang148
LANG               en_US.UTF-8
LC_CTYPE           en_US.UTF-8
LN_S               ln -s
LOGNAME            atang148
display(fn)

Error in display(fn) : could not find function "display"
dir()

 [1] "_config.yml"                 "ActionNote.txt"             
 [3] "DoSomething.R"               "Exploring_File_System.ipynb"
 [5] "filelist.Rmd"                "filesystemplay.py"          
 [7] "notebook1.Rmd"               "README.md"                  
 [9] "system_commands.ipynb"       "TEST copy.nb.html"          
[11] "TEST copy.Rmd"               "TEST.Rmd"                   
[13] "Untitled.ipynb copy"         "weblist.md"                 
[15] "z.Rproj"                    
dir()

 [1] "_config.yml"                 "ActionNote.txt"             
 [3] "DoSomething.R"               "Exploring_File_System.ipynb"
 [5] "filelist.Rmd"                "filesystemplay.py"          
 [7] "notebook1.Rmd"               "README.md"                  
 [9] "system_commands.ipynb"       "TEST copy.nb.html"          
[11] "TEST copy.Rmd"               "TEST.Rmd"                   
[13] "Untitled.ipynb copy"         "weblist.md"                 
[15] "z.Rproj"

Add a new chunk by clicking the Insert Chunk button on the toolbar or by pressing Cmd+Option+I.

When you save the notebook, an HTML file containing the code and output will be saved alongside it (click the Preview button or press Cmd+Shift+K to preview the HTML file).

The preview shows you a rendered HTML copy of the contents of the editor. Consequently, unlike Knit, Preview does not run any R code chunks. Instead, the output of the chunk when it was last run in the editor is displayed.

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