余舟 wrote:
Huhu,
Thank you for all you guys. readline works.
I hope R can be more and more powerful to deal with strings.
Strings and power come from regular expressions, check out ?regexpr.
cheers,
Paul
Thank you so much;
Zhou
2010/4/14 Erik Iverson <er...@ccbr.umn.edu>
David Scott wrote:
Erik Iverson wrote:
?? wrote:
Thank you for your reply.
My objective is simple. Assume I have a constant vector, say Vector. in
C++ code, I want to do:
int index;
cout<<"Please enter the index of the element you want to look at Vector
:";
cin>>index
cout<<Vector[index]
I want every user to be able to do this.
As I understand, scan can only read data from a fixed file. Can I just
get the input from the shell directly?
Isn't that what the file argument of ?scan says? I think?
file: the name of a file to read data values from. If the
specified file is ‘""’, then input is taken from the keyboard
(or whatever ‘stdin()’ reads if input is redirected or R is
embedded).
I think the required function is readline which prompts for user input.
?readline
Great, didn't know that one. The example in ?readline is hilarious.
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