Another example:
plot.landsurveydata: no visible binding for global variable 'value'
plot.landsurveydata: no visible binding for global variable 'variable'
plot.landsurveydata <- function(...){
# ...
qplot(time., value, data=X, color=variable, ...)
# where value and variable are columns of the data.frame X
Is there a way to tell "R CMD check" that qplot looks for time.,
value and variable as columns of X?
Thanks,
Spencer
On 4/11/2011 9:04 AM, Spencer Graves wrote:
On 4/11/2011 8:46 AM, Simon Urbanek wrote:
On Apr 11, 2011, at 11:28 AM, Davor Cubranic wrote:
On 2011-04-09, at 2:08 PM, Ted Harding wrote:
I think the right thing to so is to introduce the students to the
basics of scoping, early in the process of learning R.
I know the basics of scoping perfectly well, but that doesn't stop
me from occasionally misspelling a variable name that only causes an
error much later.
OTOH, I think with Perl you can start declaring your variables
"local" and keep the interpreter happy. But in R's context you then
have to also start declaring what you expect to inherit from parent
environments, and pretty soon the code is so encrusted with
annotation barnacles that it loses the simplicity that makes R so
nice in the interactive mode.
What would be really nice is if we had a smart R editor/IDE that
would "DWIM" and put a red underline under a misspelled name, but
leave it alone when, as Duncan said, it's in the environment.
... which is, of course, impossible since the editor has no idea what
environment you will evaluate the function in ... It can make
assumptions but they may as wrong as the spurious warnings discussed
so people will complain either way ;)
For the record, my "complaint" stemmed from my inability to see
a way to get rid of that message in that context. In most cases, I've
found that message to be very valuable in identifying latent bugs in
code. In that context, however, the message seemed inappropriate.
Duncan privately suggested I add "LazyData: yes" to the package
DESCRIPTION file. I did that, and the offending message disappeared!
Thanks again to Duncan.
Best Wishes,
Spencer
Cheers,
Simon
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Structure Inspection and Monitoring, Inc.
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