On 25/12/2014 11:30 PM, Mike Miller wrote:
On Thu, 25 Dec 2014, Bert Gunter wrote:
You persist in failing to read the docs!
the docs -- do those exclude those I have been quoting and linking to?
Moreover, neither Hadley Wickham, nor anyone else, is the authoritative
source for R usage
You have written a lot, Mike, as though we did not know it. You are not the
only one with math and multiple computing languages under your belt. The point
Bert made is that the concept that a matrix IS-A vector is not just an
implementation detail in R... it helps the practitioner keep
On Thu, 25 Dec 2014, Jeff Newmiller wrote:
You have written a lot, Mike, as though we did not know it. You are not
the only one with math and multiple computing languages under your belt.
I'm not assuming that you and Bert don't know things, but I do expect to
have a wider audience -- when
On Thu, 25 Dec 2014, Mike Miller wrote:
On Thu, 25 Dec 2014, Jeff Newmiller wrote:
You have written a lot, Mike, as though we did not know it. You are
not the only one with math and multiple computing languages under your
belt.
I'm not assuming that you and Bert don't know things, but I
On 25 Dec 2014, at 08:15 , Mike Miller mbmille...@gmail.com wrote:
is.vector returns TRUE if x is a vector of the specified mode having
no attributes other than names. It returns FALSE otherwise.
So that means that a vector in R has no attributes other than names.
Wrong. Read
On Thu, 25 Dec 2014, peter dalgaard wrote:
On 25 Dec 2014, at 08:15 , Mike Miller mbmille...@gmail.com wrote:
is.vector returns TRUE if x is a vector of the specified mode having
no attributes other than names. It returns FALSE otherwise.
So that means that a vector in R has no
On 25/12/2014 1:57 PM, Mike Miller wrote:
On Thu, 25 Dec 2014, peter dalgaard wrote:
On 25 Dec 2014, at 08:15 , Mike Miller mbmille...@gmail.com wrote:
is.vector returns TRUE if x is a vector of the specified mode having
no attributes other than names. It returns FALSE otherwise.
So
On Thu, Dec 25, 2014 at 12:41 PM, Duncan Murdoch
murdoch.dun...@gmail.com wrote:
Would you say a cube contains a polygon, or a cube is a polygon?
Neither, actually. I'd say a cube is a polyhedron or a square is a polygon.
:-)
But point taken, of course.
Cheers,
Bert
Bert Gunter
On Thu, 25 Dec 2014, Duncan Murdoch wrote:
On 25/12/2014 1:57 PM, Mike Miller wrote:
I do think I get what is going on with this, but why should I buy into
this conceptualization? Why is it better to say that a matrix *is* a
vector than to say that a matrix *contains* a vector? The latter
On 25/12/2014 3:59 PM, Bert Gunter wrote:
On Thu, Dec 25, 2014 at 12:41 PM, Duncan Murdoch
murdoch.dun...@gmail.com wrote:
Would you say a cube contains a polygon, or a cube is a polygon?
Neither, actually. I'd say a cube is a polyhedron or a square is a polygon.
:-)
But point taken,
On Thu, Dec 25, 2014 at 1:57 PM, Mike Miller mbmille...@gmail.com wrote:
I do think I get what is going on with this, but why should I buy into this
conceptualization? Why is it better to say that a matrix *is* a vector than
to say that a matrix *contains* a vector? The latter seems to be the
On Thu, 25 Dec 2014, Mike Miller wrote:
I was going to ask a question about it how to test that an object is a
vector, but then I found this:
is.vector() does not test if an object is a vector. Instead it returns
TRUE only if the object is a vector with no attributes apart from names.
Use
You persist in failing to read the docs! Moreover, neither Hadley
Wickham, nor anyone else, is the authoritative source for R usage
(other than for the (many!) packages he, himself has authored). R's
Help pages and manuals -- and ultimately the source code -- are the
only such source.
?factor
On Thu, 25 Dec 2014, Bert Gunter wrote:
You persist in failing to read the docs!
the docs -- do those exclude those I have been quoting and linking to?
Moreover, neither Hadley Wickham, nor anyone else, is the authoritative
source for R usage (other than for the (many!) packages he, himself
R 3.0.1 on Linux 64...
I was working with someone else's code. They were using ave() in a way
that I guess is nonstandard: Isn't FUN always supposed to be a variant of
mean()? The idea was to count for every element of a factor vector how
many times the level of that element occurs in the
You said:
The elements of the first vector are irrelevant because they are only
counted, so we should get the same result if it were a character
vector, but we don't:
You don't get to invent your own rules! ?ave -- always nice to read
the Help docs **before posting** -- clearly states that the x
-Original Message-
From: R-help [mailto:r-help-boun...@r-project.org] On Behalf Of Mike
Miller
Sent: Wednesday, December 24, 2014 11:31 AM
To: R-Help List
Subject: [R] ave(x, y, FUN=length) produces character output when x is
character
R 3.0.1 on Linux 64...
I was working
On Wed, 24 Dec 2014, Bert Gunter wrote:
You said:
The elements of the first vector are irrelevant because they are only
counted, so we should get the same result if it were a character
vector, but we don't:
You don't get to invent your own rules! ?ave -- always nice to read the
Help docs
On Wed, 24 Dec 2014, Nordlund, Dan (DSHS/RDA) wrote:
For your character vector example, this will get you the counts.
table(charvec)[charvec]
Hope this is helpful,
It does help, Dan! I came up with the same idea and expanded on it a bit
to work properly with other kinds of vectors:
State Department of Social and Health Services
-Original Message-
From: Mike Miller [mailto:mbmil...@gmail.com] On Behalf Of Mike Miller
Sent: Wednesday, December 24, 2014 12:44 PM
To: Nordlund, Dan (DSHS/RDA)
Cc: R-Help List
Subject: Re: [R] ave(x, y, FUN=length) produces character
ave( as.character(1:5), gl(2,2,5), FUN=length )
[1] 3 3 2 2 3The output has character type, but it is supposed
to be a collection of vector lengths.
ave() uses its first argument, 'x', to set the length of its output and to
make
an initial guess at the type of its output. The return value
On Wed, 24 Dec 2014, Mike Miller wrote:
Also, regarding the sacred text, x A numeric. is a bit terse. The
same text later refers to length(x), so I suspect that A numeric is
short for A numeric vector, but that might not mean a vector of
'numeric' type.
I just realized that numeric type
But all numeric types in R are vectors. So although it might be a good idea to
be redundant to aid beginners, the phrase a numeric is accurate.
---
Jeff NewmillerThe . . Go Live...
On Wed, 24 Dec 2014, Jeff Newmiller wrote:
On December 24, 2014 6:49:47 PM PST, Mike Miller mbmille...@gmail.com wrote:
On Wed, 24 Dec 2014, Mike Miller wrote:
Also, regarding the sacred text, x A numeric. is a bit terse. The
same text later refers to length(x), so I suspect that A numeric
You are again misinterpreting because you have not read the docs,
although this time I will grant that they are to some extent
misleading.
First of all, a matrix _IS_ a vector:
a - matrix(1:4, 2,2)
a[3] ## vector indexing works because it is a vector
[1] 3
In fact, a matrix (or array) is a
On Wed, 24 Dec 2014, Bert Gunter wrote:
You are again misinterpreting because you have not read the docs,
although this time I will grant that they are to some extent misleading.
First of all, a matrix _IS_ a vector:
a - matrix(1:4, 2,2)
a[3] ## vector indexing works because it is a vector
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