On 30/01/2017 2:17 PM, William Dunlap via R-help wrote:
This must be a pretty old RData file (pre-2.14.0). news() says:
Changes in version 2.14.0:
NEW FEATURES
o The "source" attribute on functions created with keep.source=TRUE
has been replaced with a "srcref" attribute. The "srcref"
attribute references an in-memory copy of the source file using the
"srcfilecopy" class or the new "srcfilealias" class.
*NB:* This means that functions sourced with keep.source = TRUE and
saved (e.g., by save() or readRDS()) in earlier versions of R will
no longer show the original sources (including comments).
Yes, indeed. Mik, if you do want the original formatting and comments,
something like
cat(attr(payments, "source"), sep = "\n")
should display it.
Duncan Murdoch
Bill Dunlap
TIBCO Software
wdunlap tibco.com
On Mon, Jan 30, 2017 at 9:29 AM, Mik Bickis <m.bic...@sasktel.net> wrote:
Hello:
I recently upgraded to R version 3.3.2 (2016-10-31)
Now I find that functions that I load from an older .RData file give a strange
display:
---------------------------------------------------------------------------------------------------------------------------
payments
function (a, n, tol = 1e-10)
{
p <- a/(1 - (1 + a)^(-n))
p[a < tol] <- 1/n + (n + 1) * a[a < tol]/(2 * n)
p
}
attr(,"source")
[1] "function(a,n,tol=1E-10){# required proportion of principal required to "
[2] "\t# pay off loan in n installments at interest rate a"
[3] "\tp<-a/(1-(1+a)^(-n))"
[4] "\t# linear approximation for small rates"
[5] "\tp[a<tol]<-1/n+(n+1)*a[a<tol]/(2*n)"
[6] "\tp}"
------------------------------------------------------------------------------------------------------------------------------
In addition to the usual function definition it also prints the function contents as an
attribute "source", including strange escape characters at the beginning of the
lines. Note that the comment only appears in this latter display.
This same display happens if I use the "edit" function.
However, if I copy and paste the definition into a new function, then it
displays as expected:
----------------------------------------------------------------------------------------------------------------------------
puments<-function (a, n, tol = 1e-10)
+ {
+ p <- a/(1 - (1 + a)^(-n))
+ p[a < tol] <- 1/n + (n + 1) * a[a < tol]/(2 * n)
+ p
+ }
puments
function (a, n, tol = 1e-10)
{
p <- a/(1 - (1 + a)^(-n))
p[a < tol] <- 1/n + (n + 1) * a[a < tol]/(2 * n)
p
}
--------------------------------------------------------------------------------------------------------------------------------
And I can successfully insert a comment right in the definition, as one would
like
-------------------------------------------------------------------------------------------------------------------------------------------
puments
function (a, n, tol = 1e-10)
{# required proportion of principal required to
# pay off loan in n installments at interest rate a
p <- a/(1 - (1 + a)^(-n))
p[a < tol] <- 1/n + (n + 1) * a[a < tol]/(2 * n)
p
}
-------------------------------------------------------------------------------------------------------------------------------------------
What is happening to the displays of my function definitions? I have never
witnessed such behaviour before. Is there some option I have to set
(globally) to suppress this redundancy?
Mik Bickis
Department of Mathematics and Statistics
University of Saskatchewan
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______________________________________________
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
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 -- To UNSUBSCRIBE and more, see
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.
