Re: [Rd] R Language Definition: Subsetting matrices with negative indices is *not* an error
Ah, the woes of English word order -- even this native English speaker frequently gets messed up! (but maybe I'm just a bear of little brain). Best, Bert Bert Gunter Genentech Nonclinical Biostatistics (650) 467-7374 Data is not information. Information is not knowledge. And knowledge is certainly not wisdom. Clifford Stoll On Sat, May 9, 2015 at 1:33 PM, Henrik Bengtsson henrik.bengts...@ucsf.edu wrote: On Sat, May 9, 2015 at 12:55 AM, peter dalgaard pda...@gmail.com wrote: On 09 May 2015, at 02:53 , Henrik Bengtsson henrik.bengts...@ucsf.edu wrote: Hi, I spotted what looks like another(*) mistake in 'R Language Definition' on how subsetting should work. In Section 'Indexing matrices and arrays' [http://cran.r-project.org/doc/manuals/r-release/R-lang.html#Indexing-matrices-and-arrays] one can read Negative indices are not allowed in indexing matrices. Parse error: I believe that this is intended to mean Indexing matrices may not contain negative indices not You cannot use negative indices when indexing matrices. This is consistent with the help page: A third form of indexing is via a numeric matrix with the one column for each dimension: each row of the index matrix then selects a single element of the array, and the result is a vector. Negative indices are not allowed in the index matrix. Rephrasing would seem to be in order Ah... definitely a parse error (I read it as a new paragraph). I second rephrasing this; your Indexing matrices may not contain negative indices is non-ambiguous. Thanks Peter /Henrik -pd but this is not true, e.g. x - matrix(1:12, nrow=4) x [,1] [,2] [,3] [1,]159 [2,]26 10 [3,]37 11 [4,]48 12 x[c(-2,-4),] [,1] [,2] [,3] [1,]159 [2,]37 11 /Henrik (*) https://stat.ethz.ch/pipermail/r-devel/2015-May/071091.html [docs have been fixed] __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel -- Peter Dalgaard, Professor, Center for Statistics, Copenhagen Business School Solbjerg Plads 3, 2000 Frederiksberg, Denmark Phone: (+45)38153501 Email: pd@cbs.dk Priv: pda...@gmail.com __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
Re: [Rd] R Language Definition: Subsetting matrices with negative indices is *not* an error
On 09 May 2015, at 22:33 , Henrik Bengtsson henrik.bengts...@ucsf.edu wrote: On Sat, May 9, 2015 at 12:55 AM, peter dalgaard pda...@gmail.com wrote: Rephrasing would seem to be in order Ah... definitely a parse error (I read it as a new paragraph). I second rephrasing this; your Indexing matrices may not contain negative indices is non-ambiguous. Now in R-devel. -- Peter Dalgaard, Professor, Center for Statistics, Copenhagen Business School Solbjerg Plads 3, 2000 Frederiksberg, Denmark Phone: (+45)38153501 Email: pd@cbs.dk Priv: pda...@gmail.com __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
Re: [Rd] R Language Definition: Subsetting matrices with negative indices is *not* an error
On Sat, May 9, 2015 at 12:55 AM, peter dalgaard pda...@gmail.com wrote: On 09 May 2015, at 02:53 , Henrik Bengtsson henrik.bengts...@ucsf.edu wrote: Hi, I spotted what looks like another(*) mistake in 'R Language Definition' on how subsetting should work. In Section 'Indexing matrices and arrays' [http://cran.r-project.org/doc/manuals/r-release/R-lang.html#Indexing-matrices-and-arrays] one can read Negative indices are not allowed in indexing matrices. Parse error: I believe that this is intended to mean Indexing matrices may not contain negative indices not You cannot use negative indices when indexing matrices. This is consistent with the help page: A third form of indexing is via a numeric matrix with the one column for each dimension: each row of the index matrix then selects a single element of the array, and the result is a vector. Negative indices are not allowed in the index matrix. Rephrasing would seem to be in order Ah... definitely a parse error (I read it as a new paragraph). I second rephrasing this; your Indexing matrices may not contain negative indices is non-ambiguous. Thanks Peter /Henrik -pd but this is not true, e.g. x - matrix(1:12, nrow=4) x [,1] [,2] [,3] [1,]159 [2,]26 10 [3,]37 11 [4,]48 12 x[c(-2,-4),] [,1] [,2] [,3] [1,]159 [2,]37 11 /Henrik (*) https://stat.ethz.ch/pipermail/r-devel/2015-May/071091.html [docs have been fixed] __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel -- Peter Dalgaard, Professor, Center for Statistics, Copenhagen Business School Solbjerg Plads 3, 2000 Frederiksberg, Denmark Phone: (+45)38153501 Email: pd@cbs.dk Priv: pda...@gmail.com __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
Re: [Rd] R Language Definition: Subsetting matrices with negative indices is *not* an error
On 09 May 2015, at 02:53 , Henrik Bengtsson henrik.bengts...@ucsf.edu wrote: Hi, I spotted what looks like another(*) mistake in 'R Language Definition' on how subsetting should work. In Section 'Indexing matrices and arrays' [http://cran.r-project.org/doc/manuals/r-release/R-lang.html#Indexing-matrices-and-arrays] one can read Negative indices are not allowed in indexing matrices. Parse error: I believe that this is intended to mean Indexing matrices may not contain negative indices not You cannot use negative indices when indexing matrices. This is consistent with the help page: A third form of indexing is via a numeric matrix with the one column for each dimension: each row of the index matrix then selects a single element of the array, and the result is a vector. Negative indices are not allowed in the index matrix. Rephrasing would seem to be in order -pd but this is not true, e.g. x - matrix(1:12, nrow=4) x [,1] [,2] [,3] [1,]159 [2,]26 10 [3,]37 11 [4,]48 12 x[c(-2,-4),] [,1] [,2] [,3] [1,]159 [2,]37 11 /Henrik (*) https://stat.ethz.ch/pipermail/r-devel/2015-May/071091.html [docs have been fixed] __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel -- Peter Dalgaard, Professor, Center for Statistics, Copenhagen Business School Solbjerg Plads 3, 2000 Frederiksberg, Denmark Phone: (+45)38153501 Email: pd@cbs.dk Priv: pda...@gmail.com __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
[Rd] R Language Definition: Subsetting matrices with negative indices is *not* an error
Hi, I spotted what looks like another(*) mistake in 'R Language Definition' on how subsetting should work. In Section 'Indexing matrices and arrays' [http://cran.r-project.org/doc/manuals/r-release/R-lang.html#Indexing-matrices-and-arrays] one can read Negative indices are not allowed in indexing matrices. but this is not true, e.g. x - matrix(1:12, nrow=4) x [,1] [,2] [,3] [1,]159 [2,]26 10 [3,]37 11 [4,]48 12 x[c(-2,-4),] [,1] [,2] [,3] [1,]159 [2,]37 11 /Henrik (*) https://stat.ethz.ch/pipermail/r-devel/2015-May/071091.html [docs have been fixed] __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
