Re: [R] proto and get()
In further offline discussion with the poster it was explained that
the purpose of this is to display the icon object and not to return an
instantiatedProtoMethod which was what the code was attempting to do.
That is in proto, g$icon is not the icon object. It is the icon method
instantiated with the g object, essentially a currying operation in
which the object is plugged into the first arguement of icon and the
resulting function (no longer a method since its now been
instantiated) returned. To get what the poster desires, namely the
icon object itself, one would do this instead of g$icon:
with(g, icon)
On Thu, Oct 8, 2009 at 7:44 PM, Gabor Grothendieck
ggrothendi...@gmail.com wrote:
This may be a bug in objects of class instantiatedProtoMethod. I
tried it with the devel version of proto and got no error so you could
try that. I will send it to you offline for your try.
On Thu, Oct 8, 2009 at 1:02 PM, baptiste auguie
baptiste.aug...@googlemail.com wrote:
Dear all,
In mucking around with ggplot2, I've hit the following snag,
library(ggplot2)
# this returns a grob, OK
GeomAbline$icon()
# lines[GRID.lines.9]
# this returns the function icon, OK
GeomAbline$icon
# proto method (instantiated with ): function (.)
# linesGrob(c(0, 1), c(0.2, 0.8))
# environment: 0x13e6800
Now I want to wrap this in a function,
getIcon - function(geom){
st - paste(Geom, firstUpper(geom), sep=)
g - get(st, 2)
g$icon()
}
getIcon(abline) # still OK
# lines[GRID.lines.10]
but ...
getIcon - function(geom){
st - paste(Geom, firstUpper(geom), sep=)
g - get(st, 2)
g$icon
}
getIcon(abline)
# proto method (instantiated with ):
# Error in get(icon, env = g, inherits = TRUE) : object 'g' not found
So, it seems that I'm being too naive about using get on a proto
object or something along those lines.
I'd be grateful if proto experts could help me extract the icon
function from this object.
Best regards,
baptiste
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[R] proto and get()
Dear all,
In mucking around with ggplot2, I've hit the following snag,
library(ggplot2)
# this returns a grob, OK
GeomAbline$icon()
# lines[GRID.lines.9]
# this returns the function icon, OK
GeomAbline$icon
# proto method (instantiated with ): function (.)
# linesGrob(c(0, 1), c(0.2, 0.8))
# environment: 0x13e6800
Now I want to wrap this in a function,
getIcon - function(geom){
st - paste(Geom, firstUpper(geom), sep=)
g - get(st, 2)
g$icon()
}
getIcon(abline) # still OK
# lines[GRID.lines.10]
but ...
getIcon - function(geom){
st - paste(Geom, firstUpper(geom), sep=)
g - get(st, 2)
g$icon
}
getIcon(abline)
# proto method (instantiated with ):
# Error in get(icon, env = g, inherits = TRUE) : object 'g' not found
So, it seems that I'm being too naive about using get on a proto
object or something along those lines.
I'd be grateful if proto experts could help me extract the icon
function from this object.
Best regards,
baptiste
__
R-help@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.
Re: [R] proto and get()
... without answering my previous question, I have just found a
fortune-hate workaround,
getIcon - function(geom){
st - paste(Geom, firstUpper(geom),$icon, sep=)
eval(parse(text=st))
}
getIcon(abline)
I'm still curious about the get() behaviour though.
Best,
baptiste
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] proto and get()
This may be a bug in objects of class instantiatedProtoMethod. I
tried it with the devel version of proto and got no error so you could
try that. I will send it to you offline for your try.
On Thu, Oct 8, 2009 at 1:02 PM, baptiste auguie
baptiste.aug...@googlemail.com wrote:
Dear all,
In mucking around with ggplot2, I've hit the following snag,
library(ggplot2)
# this returns a grob, OK
GeomAbline$icon()
# lines[GRID.lines.9]
# this returns the function icon, OK
GeomAbline$icon
# proto method (instantiated with ): function (.)
# linesGrob(c(0, 1), c(0.2, 0.8))
# environment: 0x13e6800
Now I want to wrap this in a function,
getIcon - function(geom){
st - paste(Geom, firstUpper(geom), sep=)
g - get(st, 2)
g$icon()
}
getIcon(abline) # still OK
# lines[GRID.lines.10]
but ...
getIcon - function(geom){
st - paste(Geom, firstUpper(geom), sep=)
g - get(st, 2)
g$icon
}
getIcon(abline)
# proto method (instantiated with ):
# Error in get(icon, env = g, inherits = TRUE) : object 'g' not found
So, it seems that I'm being too naive about using get on a proto
object or something along those lines.
I'd be grateful if proto experts could help me extract the icon
function from this object.
Best regards,
baptiste
__
R-help@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.
__
R-help@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.
