4 messages · John C Nash, David L Carlson, Bert Gunter
I am trying to fix up some image files (jpg) that have comments in them. Unfortunately, many have had extra special characters encoded. rdjpgcom, called from an R script, returns a comment e.g., "In Alvarez Cabral street by no. 105.\\000" I want to get rid of "\\000", but sub seems to be giving trouble.
sub("\\000", "", ctxt)
[1] "In Alvarez Cabral street by no. 105.\\0" Anyone know how to resolve this? JN
Each of the backslashes need to be escaped with a backslash:
ctxt <- "In Alvarez Cabral street by no. 105.\\000"
sub("\\\\000", "", ctxt)
[1] "In Alvarez Cabral street by no. 105." ------------------------------------------------------- David L. Carlson Department of Anthropology Texas A&M University -----Original Message----- From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of J C Nash Sent: Saturday, December 15, 2018 9:32 AM To: r-help <r-help at R-project.org> Subject: [R] Dealing with special characters at end of line in file I am trying to fix up some image files (jpg) that have comments in them. Unfortunately, many have had extra special characters encoded. rdjpgcom, called from an R script, returns a comment e.g., "In Alvarez Cabral street by no. 105.\\000" I want to get rid of "\\000", but sub seems to be giving trouble.
sub("\\000", "", ctxt)
[1] "In Alvarez Cabral street by no. 105.\\0" Anyone know how to resolve this? JN ______________________________________________ R-help at 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.
... or used the fixed = TRUE argument.
z <-"In Alvarez Cabral street by no. 105.\\000"
sub("\\000","", z, fixed = TRUE)
[1] "In Alvarez Cabral street by no. 105." Bert Gunter "The trouble with having an open mind is that people keep coming along and sticking things into it." -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )
I am trying to fix up some image files (jpg) that have comments in them. Unfortunately, many have had extra special characters encoded. rdjpgcom, called from an R script, returns a comment e.g., "In Alvarez Cabral street by no. 105.\\000" I want to get rid of "\\000", but sub seems to be giving trouble.
sub("\\000", "", ctxt)
[1] "In Alvarez Cabral street by no. 105.\\0" Anyone know how to resolve this? JN
______________________________________________ R-help at 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.
Many thanks. I'd misread the doc re fixed, and misunderstood the number of escapes. Sigh. JN
... or used the fixed = TRUE argument.
z <-"In? Alvarez Cabral street by no. 105.\\000"
sub("\\000","", z, fixed = TRUE)
[1] "In? Alvarez Cabral street by no. 105."
Bert Gunter
"The trouble with having an open mind is that people keep coming along and sticking things into it."
-- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )
On Sat, Dec 15, 2018 at 7:32 AM J C Nash <profjcnash at gmail.com <mailto:profjcnash at gmail.com>> wrote:
I am trying to fix up some image files (jpg) that have comments in them.
Unfortunately, many have had extra special characters encoded.
rdjpgcom, called from an R script, returns a comment e.g.,
"In? Alvarez Cabral street by no. 105.\\000"
I want to get rid of "\\000", but sub seems
to be giving trouble.
> sub("\\000", "", ctxt)
[1] "In? Alvarez Cabral street by no. 105.\\0"
Anyone know how to resolve this?
JN
______________________________________________
R-help at r-project.org <mailto:R-help at 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.