[R] 'scan' in a script?

[jim holtman]

If you want the value printed in the script, then use the 'print' function:

print(MyNames)

There is an implicit 'print' when you type an object's name at the
command line, but with you have it within a script, you have to
explicitly print it.

On Thu, Jul 9, 2009 at 5:08 PM, Mark Knecht<markknecht at gmail.com> wrote:
> Jim,
>   In Rgui there is a feature to create a new script so I open that
> and get a blank editor. I put these commands in the script
>
> MyNames = scan(what="")
> MyNames
>
>   Whether I ask Rgui to run the whole script as a script - not
> sourced - it runs the first command, doesn't wait for input and then
> runs the second command. I see
>
>> MyNames
> character(0)
>>
>
>   If I right click the first line and ask it to run the selection or
> line then R waits for the input.
>
>   If I source the file then the opposite happens. It does the scan
> correctly, waiting for me to make entries. When I finish it doesn't
> print what's in MyNames, as shown here where I typed in happy sad test
> go and hit enter.
>
>> source("C:\\Users\\Mark\\Documents\\R\\Test Cases\\scan from script.R")
> 1: happy sad test go
> 5:
> Read 4 items
>>
>
>   Possibly (probably!) this is a misunderstanding on my part, but
> it's something I need to start looking at as the reason for me
> checking out R at all was as a potential way to develop a complete
> program, as opposed to writing it in C, so I need to start looking at
> how to give it input (file names, directory paths, user requests)
> other than changing source code.
>
>   I hope this is clear enough and I appreciate your inputs.
>
> Cheers,
> Mark
>
> On Thu, Jul 9, 2009 at 1:02 PM, jim holtman<jholtman at gmail.com> wrote:
>> Exactly how are you using it?  How you executing your script?  Are you
>> using cut/paste or source?  Have you tried 'readline'?
>>
>> More details on what you mean by it does not work as expected.
>>
>> On Thu, Jul 9, 2009 at 2:24 PM, Mark Knecht<markknecht at gmail.com> wrote:
>>> When I use the scan function in the Rgui console it works as expected.
>>> However it seems that when I put the same command in a script file it
>>> doesn't wait for input.
>>>
>>> Is there an option to scan to make it wait for input when used in a
>>> script? Or is there possibly a different function that will do in a
>>> script the same sort of thing as scan does in the console?
>>>
>>> Thanks,
>>> Mark
>>>
>>> ______________________________________________
>>> R-help at r-project.org mailing list
>>> https://stat.ethz.ch/mailman/listinfo/r-help
>>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>>> and provide commented, minimal, self-contained, reproducible code.
>>>
>>
>>
>>
>> --
>> Jim Holtman
>> Cincinnati, OH
>> +1 513 646 9390
>>
>> What is the problem that you are trying to solve?
>>
>



-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem that you are trying to solve?