R help - Mar 2007 - using scan to record user's input

Silly question: Are you 'source'-ing this code or copying and pasting
it from somewhere?  I don't have any problems running your above
example on a PPC Mac with almost the same version of R (using
'source').

Here's my info:
R version 2.4.1 (2006-12-18)
powerpc-apple-darwin8.8.0

locale:
en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8

attached base packages:
[1] "stats"     "graphics"  "grDevices"
"utils"     "datasets"
"methods"   "base"

other attached packages:
      MASS KernSmooth
  "7.2-30"  "2.22-19"

Otherwise, I'm as stumped as you are.

On 3/11/07, Ken Knoblauch <knoblauch at lyon.inserm.fr>
wrote:
> I'm using scan in a script to record a series of responses of the user
as
> a function
> of some graphs that I put up on the screen.  A toy version would be,
>
> y <- rep(NA, 3)
> for (ix in seq( length(y) ) ) {
>         y[ix] <- scan( n = 1 )
>         }
>
> However, if I include any code after this loop, for example,
> y <- rep(NA, 3)
> for (ix in seq( length(y) ) ) {
>         y[ix] <- scan( n = 1 )
>         }
> y
>
> I get an error after I've entered my first number.
>
> 1: y
> 1: 3
> Error in scan(file, what, nmax, sep, dec, quote, skip, nlines, na.strings, 
:
>         scan() expected 'a real', got 'y'
>
> scan seems to be trying to read the commands after the loop.  In the real
> case,
> the loop is longer and there are more commands after the loop.
> If I have more commands, I get the error right away, before the prompt to
> enter a number.
>
> I didn't see anything in the scan help that would allow me to
circumvent
> this error.
>
> Can anyone suggest a way to get around this error.
>
> Thank you.
>
> Ken
>
> Here is my info
>
> sessionInfo()
> R version 2.4.1 Patched (2007-01-23 r40561)
> i386-apple-darwin8.8.1
>
> locale:
> C
>
> attached base packages:
> [1] "stats"     "graphics"  "grDevices"
"utils"     "datasets"  "methods"
> [7] "base"
>
> other attached packages:
>     MASS
> "7.2-31"
>
>
> --
> Ken Knoblauch
> Inserm U846
> Institut Cellule Souche et Cerveau
> D?partement Neurosciences Int?gratives
> 18 avenue du Doyen L?pine
> 69500 Bron
> France
> tel: +33 (0)4 72 91 34 77
> fax: +33 (0)4 72 91 34 61
> portable: +33 (0)6 84 10 64 10
> http://www.pizzerialesgemeaux.com/u846/
>
> ______________________________________________
> R-help at stat.math.ethz.ch 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.
>

I'm using scan in a script to record a series of responses of the user as
a function
of some graphs that I put up on the screen.  A toy version would be,

y <- rep(NA, 3)
for (ix in seq( length(y) ) ) {
	y[ix] <- scan( n = 1 )
	}

However, if I include any code after this loop, for example,
y <- rep(NA, 3)
for (ix in seq( length(y) ) ) {
	y[ix] <- scan( n = 1 )
	}
y

I get an error after I've entered my first number.

1: y
1: 3
Error in scan(file, what, nmax, sep, dec, quote, skip, nlines, na.strings,  :
	scan() expected 'a real', got 'y'

scan seems to be trying to read the commands after the loop.  In the real
case,
the loop is longer and there are more commands after the loop.
If I have more commands, I get the error right away, before the prompt to
enter a number.

I didn't see anything in the scan help that would allow me to circumvent
this error.

Can anyone suggest a way to get around this error.

Thank you.

Ken

Here is my info

sessionInfo()
R version 2.4.1 Patched (2007-01-23 r40561)
i386-apple-darwin8.8.1

locale:
C

attached base packages:
[1] "stats"     "graphics"  "grDevices"
"utils"     "datasets"  "methods"
[7] "base"

other attached packages:
    MASS
"7.2-31"


-- 
Ken Knoblauch
Inserm U846
Institut Cellule Souche et Cerveau
D?partement Neurosciences Int?gratives
18 avenue du Doyen L?pine
69500 Bron
France
tel: +33 (0)4 72 91 34 77
fax: +33 (0)4 72 91 34 61
portable: +33 (0)6 84 10 64 10
http://www.pizzerialesgemeaux.com/u846/