On 06/19/2010 09:14 PM, Patrick Burns wrote:
On 19/06/2010 12:00, Jim Lemon wrote:
Greg Snow wrote:
...
If you really care more about saving characters or key strokes over
clarity of expression then you should really be using APL...
I think maybe it is K rather than APL.
No, APL. I still hav
On 19/06/2010 12:00, Jim Lemon wrote:
Greg Snow wrote:
...
If you really care more about saving characters or key strokes over
clarity of expression then you should really be using APL...
I think maybe it is K rather than APL.
Pat
I would agree with that. When I had to learn APL at univers
Greg Snow wrote:
...
If you really care more about saving characters or key strokes over
clarity of expression then you should really be using APL...
I would agree with that. When I had to learn APL at university, I hated
it because it was like typing hieroglyphics. Finally I bought the manua
Dear users,
Regarding the number of keystrokes, you guys should not forget that not
everybody has a QWERTY keyboard, and therefore the number of strokes
isn't the same for everybody. On an AZERTY keyboard (French), "<" is
written without pressing SHIFT, as is "=". On a QWERTZ (German) "="
req
.
--
Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.s...@imail.org
801.408.8111
> -Original Message-
> From: Horace Tso [mailto:horace@pgn.com]
> Sent: Friday, June 18, 2010 3:15 PM
> To: Erik Iverson; Greg Snow
> Cc: r-help
> Subject: RE:
On Fri, Jun 18, 2010 at 8:15 PM, Horace Tso wrote:
...
>> which(x<-2)
> Error in which(x <- 2) : argument to 'which' is not logical
>
> Oops, what happened? If you look up help pages for 'which', you'd find no
> clue.
You just have to look at the error message. R adds the spaces and you
see immed
t plus
the space before and after it, which I would add for readability
anyways (although I suppose liking spaces in code may just be personal
taste).
>
> H
>
> -Original Message-
> From: Erik Iverson [mailto:er...@ccbr.umn.edu]
> Sent: Friday, June 18, 2010 1:23 PM
> T
h
+44 20 7567 9882
- Original Message -
From: r-help-boun...@r-project.org
To: Horace Tso
Cc: r-help
Sent: Fri Jun 18 23:26:23 2010
Subject: Re: [R] questions on some operators in R
On Fri, Jun 18, 2010 at 2:15 PM, Horace Tso wrote:
> Li li,
>
> I know many S-language old time
3 PM
To: Horace Tso
Subject: RE: [R] questions on some operators in R
And the 2nd example?
--
Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.s...@imail.org
801.408.8111
> -Original Message-
> From: Horace Tso [mailto:horace@pgn.com]
> Sent:
On Fri, Jun 18, 2010 at 2:15 PM, Horace Tso wrote:
> Li li,
>
> I know many S-language old timers would tell you to use <- over = for
> assignment. Speaking from my own painful experience of debugging S/R codes, I
> much much much prefer '='. In fact, I'd like to see the R language get ride
> o
Certainly not. I'm just too lazy.
-Original Message-
From: David Winsemius [mailto:dwinsem...@comcast.net]
Sent: Friday, June 18, 2010 2:57 PM
To: Horace Tso
Cc: Erik Iverson; Greg Snow; r-help
Subject: Re: [R] questions on some operators in R
On Jun 18, 2010, at 5:15 PM, Horac
.umn.edu]
Sent: Friday, June 18, 2010 1:23 PM
To: Greg Snow
Cc: Horace Tso; li li; r-help
Subject: Re: [R] questions on some operators in R
Greg Snow wrote:
Your example could also be used as an argument against allowing '='
as a shortcut for <- after all if you are used to using
Horace Tso wrote:
You still couldn't sway me into the <- camp. '=' is better for yet
two more reasons,
1. it requires one keystroke, rather than two,
2. to type '<', one has to hold Shift then the ',' key, so it's a
total of three strokes all together.
This is a valid point.
You can, howeve
ypical script, you have hundreds of assignment statements. Those extra
keystroke translate into quite a bit more wear on your fingers.
H
-Original Message-
From: Erik Iverson [mailto:er...@ccbr.umn.edu]
Sent: Friday, June 18, 2010 1:23 PM
To: Greg Snow
Cc: Horace Tso; li li; r-help
Sub
Greg Snow wrote:
Your example could also be used as an argument against allowing '=' as a shortcut for <-
after all if you are used to using <- (rather than =) then you will see the problem with
x<-2 right off. But if we eliminate <- and only use =, then how do you do:
mean( x <- rnorm(100
From: Horace Tso [mailto:horace@pgn.com]
> Sent: Friday, June 18, 2010 12:16 PM
> To: li li; Greg Snow
> Cc: r-help
> Subject: RE: [R] questions on some operators in R
>
> Li li,
>
> I know many S-language old timers would tell you to use <- over = for
> assignment.
nding hours finding
> out what's wrong with such innocent expression. The worst part is, you'd have
> lost your vector x forever. Just image if x is 1200 by 1200 matrix.
>
> HTH.
>
> H
>
>
>
>
>
> -Original Message-
> From: r-help-boun...@r-project.org [mailto:
roject.org] On
Behalf Of li li
Sent: Friday, June 18, 2010 10:01 AM
To: Greg Snow
Cc: r-help
Subject: Re: [R] questions on some operators in R
Thank you all for your kind reply!
Hannah
2010/6/18 Greg Snow
> Just to expand a little on David's reply.
>
> The & vs. &am
Thank you all for your kind reply!
Hannah
2010/6/18 Greg Snow
> Just to expand a little on David's reply.
>
> The & vs. && and | vs. || issue is really about where and how you plan to
> use things. & and | work on vectors and are intended to be used to combine
> logical vectors
Just to expand a little on David's reply.
The & vs. && and | vs. || issue is really about where and how you plan to use
things. & and | work on vectors and are intended to be used to combine logical
vectors into a new logical vector (that can be used for various things). &&
and || are used fo
On Jun 16, 2010, at 6:33 PM, li li wrote:
Hi all,
I have two questions. Can some one give some help?
The first question is regarding the pair of operators "&" and
"&&". What
is the
difference between the two?
& operates on vectors, returns a vector
&& operates on the first item in ea
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