4 messages · Gabor Grothendieck, Duncan Murdoch
I noticed the following difference in parse(text = ...) between R 2.4.1 and R 2.5.0. ===
parse(text = "\"^\" (x ,2 )")
expression(x^2)
R.version.string
[1] "R version 2.4.1 Patched (2006-12-30 r40331)" ====
parse(text = "\"^\" (x ,2 )")
expression("^" (x ,2 ))
R.version.string
[1] "R version 2.5.0 RC (2007-04-16 r41194)" ==== Ryacas was depending on the behavior in R 2.4.1 so the new behavior breaks it. Is this intentional? a bug? How do I get the R 2.4.1 output from R 2.5.0 ?
I noticed the following difference in parse(text = ...) between R 2.4.1 and R 2.5.0. ===
parse(text = "\"^\" (x ,2 )")
expression(x^2)
R.version.string
[1] "R version 2.4.1 Patched (2006-12-30 r40331)" ====
parse(text = "\"^\" (x ,2 )")
expression("^" (x ,2 ))
R.version.string
[1] "R version 2.5.0 RC (2007-04-16 r41194)" ==== Ryacas was depending on the behavior in R 2.4.1 so the new behavior breaks it. Is this intentional? a bug? How do I get the R 2.4.1 output from R 2.5.0 ?
There's no difference in the parsing, the difference is in the printing. By default 2.5.0 will echo what you typed, whereas 2.4.1 will deparse. You can get the 2.4.1 behaviour using options(keep.source=F) or parse(text = "\"^\" (x ,2 )", srcfile=NULL) (as ?parse says). Duncan Murdoch
On 4/27/2007 11:34 AM, Gabor Grothendieck wrote:
I noticed the following difference in parse(text = ...) between R 2.4.1 and R 2.5.0. ===
parse(text = "\"^\" (x ,2 )")
expression(x^2)
R.version.string
[1] "R version 2.4.1 Patched (2006-12-30 r40331)" ====
parse(text = "\"^\" (x ,2 )")
expression("^" (x ,2 ))
R.version.string
[1] "R version 2.5.0 RC (2007-04-16 r41194)" ==== Ryacas was depending on the behavior in R 2.4.1 so the new behavior breaks it. Is this intentional? a bug? How do I get the R 2.4.1 output from R 2.5.0 ?
There's no difference in the parsing,
This isn't quite true, of course: in 2.5.0 the default parse output includes an attribute that references the original source. I think the rest of what I wrote is right: the difference is in the printing.
By default 2.5.0 will echo what you typed, whereas 2.4.1 will deparse. You can get the 2.4.1 behaviour using options(keep.source=F) or parse(text = "\"^\" (x ,2 )", srcfile=NULL) (as ?parse says). Duncan Murdoch
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Thanks, that did it.
On 4/27/2007 11:34 AM, Gabor Grothendieck wrote:
I noticed the following difference in parse(text = ...) between R 2.4.1 and R 2.5.0. ===
parse(text = "\"^\" (x ,2 )")
expression(x^2)
R.version.string
[1] "R version 2.4.1 Patched (2006-12-30 r40331)" ====
parse(text = "\"^\" (x ,2 )")
expression("^" (x ,2 ))
R.version.string
[1] "R version 2.5.0 RC (2007-04-16 r41194)" ==== Ryacas was depending on the behavior in R 2.4.1 so the new behavior breaks it. Is this intentional? a bug? How do I get the R 2.4.1 output from R 2.5.0 ?
There's no difference in the parsing, the difference is in the printing. By default 2.5.0 will echo what you typed, whereas 2.4.1 will deparse. You can get the 2.4.1 behaviour using options(keep.source=F) or parse(text = "\"^\" (x ,2 )", srcfile=NULL) (as ?parse says). Duncan Murdoch