[Rd] R CMD check tells me 'no visible binding for global variable ', what does it mean?
When I run R CMD check on a package I have recently started work on I
get the following:
* checking R code for possible problems ... NOTE
addlinear: no visible binding for global variable 'x'
I appreciate that this is only a NOTE and so I assume is R's
equivalent of 'This is perfectly legal but I wonder whether it is
really what you intended' but I would like to understand it.
In the relevant function addlinear the following function is defined locally:
orfun - function(x, oddsratio) {1/(1+1/(oddsratio * (x/(1-x}
and then used later in curve
curve(orfun(x, exp(estimate)), from = 0.001, to = 0.999, add = TRUE)
These are the only occurrences of 'x'.
Is it just telling me that I have never assigned a value to x? Or is
it more sinister than that? As far as I can tell the function does
what I intended.
Michael Dewey
http://www.aghmed.fsnet.co.uk
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Re: [Rd] R CMD check tells me 'no visible binding for global variable ', what does it mean?
On 12/04/2010 10:51 AM, Michael Dewey wrote:
When I run R CMD check on a package I have recently started work on I
get the following:
* checking R code for possible problems ... NOTE
addlinear: no visible binding for global variable 'x'
I appreciate that this is only a NOTE and so I assume is R's
equivalent of 'This is perfectly legal but I wonder whether it is
really what you intended' but I would like to understand it.
In the relevant function addlinear the following function is defined locally:
orfun - function(x, oddsratio) {1/(1+1/(oddsratio * (x/(1-x}
and then used later in curve
curve(orfun(x, exp(estimate)), from = 0.001, to = 0.999, add = TRUE)
These are the only occurrences of 'x'.
Is it just telling me that I have never assigned a value to x? Or is
it more sinister than that? As far as I can tell the function does
what I intended.
The curve() function evaluates the first argument in a strange way, and
this confuses the code checking. (The variable name x is special to
curve().)
I think you can avoid the warning by rewriting that call to curve() as
curve(function(x) orfun(x, exp(estimate)), from = 0.001, to = 0.999, add = TRUE)
Duncan Murdoch
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Re: [Rd] R CMD check tells me 'no visible binding for global variable ', what does it mean?
On Mon, Apr 12, 2010 at 5:08 PM, Duncan Murdoch murd...@stats.uwo.ca wrote:
On 12/04/2010 10:51 AM, Michael Dewey wrote:
When I run R CMD check on a package I have recently started work on I get
the following:
* checking R code for possible problems ... NOTE
addlinear: no visible binding for global variable 'x'
I appreciate that this is only a NOTE and so I assume is R's equivalent of
'This is perfectly legal but I wonder whether it is really what you
intended' but I would like to understand it.
In the relevant function addlinear the following function is defined
locally:
orfun - function(x, oddsratio) {1/(1+1/(oddsratio * (x/(1-x}
and then used later in curve
curve(orfun(x, exp(estimate)), from = 0.001, to = 0.999, add = TRUE)
These are the only occurrences of 'x'.
Is it just telling me that I have never assigned a value to x? Or is it
more sinister than that? As far as I can tell the function does what I
intended.
The curve() function evaluates the first argument in a strange way, and this
confuses the code checking. (The variable name x is special to curve().)
I think you can avoid the warning by rewriting that call to curve() as
curve(function(x) orfun(x, exp(estimate)), from = 0.001, to = 0.999, add =
TRUE)
...or
x - NULL; rm(x); # Dummy to trick R CMD check
curve(orfun(x, exp(estimate)), from = 0.001, to = 0.999, add = TRUE)
/Henrik
Duncan Murdoch
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