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system() under windows [x] but not with Mac

4 messages · barb, David Winsemius, Joshua Wiley +1 more

barb
# 
Hey Guys,

i am kind of confused. Under windows the system() function works great, but
not with my mac.
  I have two questions:

1) What do i have to change. Using packages which require system or
eval(parse() everything is fine, but
when i try it myself "sh: cmd: command not found"
Under windows i use e.g system('cmd /c copy "bild.jpg"',intern=FALSE )

2) I really love the Hmisc/latex function and want to be able to do it
myself. 
    How could i save a text in my notepad as name.txt

Thank you!!

   

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David Winsemius
#
On May 20, 2012, at 6:49 PM, barb wrote:

            

      
      
      
    

        
There is no 'cmd' system function in MacOSX.

system("cp q.csv q2.csv")  # succeeds in making a copy of an existing  
file in the working directory

            

      
      
      
    

        
I do not understand what the problem is. What is meant by "do it"?  
What is the "notepad"?

            

      
      
      
    

        

  
    

      
      
    

  


  


      

    

    

      
      

        


  

        

      Joshua Wiley
    

    

      
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On Mon, May 21, 2012 at 6:25 AM, David Winsemius <dwinsemius at comcast.net> wrote:

            

      
      
      
    

        
Geez, David, clearly the OP wants R to call the webcam to grab images
of a notepad, perform text recognition on those images, and store the
text in name.txt

...what do you mean when you say save the text in your notepad?

            

      
      
      
    

        

      
      
    

        

  
    

      
      
    

  


  


      

    

    

      
      

        


  

        

      MacQueen, Don
    

    

      
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The Mac does not have an application called notepad, so you can't "save a
text in [your] notepad". However, the Mac has TextEdit, and if you save
any file with the ".txt" suffix it will open in TextEdit when you
double-click on it in a Finder window (outside R, that is).

You could even, from inside R, type
  system('open name.txt')
and it will open the file in TextEdit, provided that the file is in what R
considers to be your working directory.

To save a file from within R, start by viewing the help pages for
  write.table
  sink
  cat
depending on what you want to save and how you want it structured in the
file.

-Don