Displaying 20 results from an estimated 103 matches for "stavro".
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stavros
2018 Dec 20
3
Intentionally use weak server key
>
> If you can convince openssl to use it.
Does anybody have any hints on how it may be done, if possible at all?
Stavros
2018 Dec 20
2
Intentionally use weak server key
...reason I need to use a really weak server key (256 bit) with
dovecot for imaps access. Is this possible?
I tried but getting this error:
dovecot: imap-login: Error: SSL: Stacked error: error:04075070:rsa
routines:RSA_sign:digest too big for rsa key
This is on an Ubuntu 14.04 on x64.
Thank you!
Stavros
2009 Jul 29
3
Object equality for S4 objects
To test two environments for object equality (Lisp EQ), I can use 'identity':
> e1 <- environment(local(function()x))
> e2 <- environment(local(function()x))
> identical(e1,e2) # compares object identity
[1] FALSE
> identical(as.list(e1),as.list(e2)) # compares values as name->value mapping
[1] TRUE # (is there a
2009 Feb 10
1
Variable/function namespaces WAS: Bug in subsetting data frame (PR#13515)
On Tue, Feb 10, 2009 at 10:11 AM, Duncan Murdoch <murdoch at stats.uwo.ca> wrote:
> Stavros Macrakis wrote:
>> On Tue, Feb 10, 2009 at 8:31 AM, Duncan Murdoch <murdoch at stats.uwo.ca>wrote:
>>> The evaluator recognizes the context of usage and will get the
>>> function for a function call....
>> Can you point me to chapter and verse in the language de...
2008 Nov 29
2
Using grep() to subset lines of text
I have two vectors, a and b. b is a text file. I want to find in b those
elements of a which occur at the beginning of the line in b. I have the
following code, but it only returns a value for the first value in a, but I
want both. Any ideas please.
a = c(2,3)
b = NULL
b[1] = "aaa 2 aaa"
b[2] = "2 aaa"
b[3] = "3 aaa"
b[4] = "aaa 3 aaa"
2009 Mar 09
3
E`<`<rrors in recursive default argument references
Tested in: R version 2.8.1 (2008-12-22) / Windows
Recursive default argument references normally give nice clear errors.
In the first set of examples, you get the error:
Error in ... :
promise already under evaluation: recursive default argument
reference or earlier problems?
(function(a = a) a ) ()
(function(a = a) c(a) ) ()
(function(a = a) a[1] ) ()
(function(a = a)
2018 Dec 20
0
Intentionally use weak server key
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On 20 December 2018 at 12:25 Stavros Tsolakos <
<a href="mailto:stsolakos@gmail.com">stsolakos@gmail.com</a>> wrote:
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Hi list!
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&...
2018 Dec 20
0
Intentionally use weak server key
...I doubt
if you will be able to find companies like DigiCert or Comodo to do
this.
If you want, I can try sign it with our own 'internal' CA. The only
thing you have to do is of course adding our CA to your ca bundle but
that is very easy in CentOS7
-----Original Message-----
From: Stavros Tsolakos [mailto:stsolakos at gmail.com]
Sent: 20 December 2018 11:33
To: Dovecot Mailing List
Subject: Re: Intentionally use weak server key
>
> If you can convince openssl to use it.
Does anybody have any hints on how it may be done, if possible at all?
Stavros
2009 Feb 17
2
cumsum vs. sum
I recently traced a bug of mine to the fact that cumsum(s)[length(s)]
is not always exactly equal to sum(s).
For example,
x<-1/(12:14)
sum(x) - cumsum(x)[3] => 2.8e-17
Floating-point addition is of course not exact, and in particular is
not associative, so there are various possible reasons for this.
Perhaps sum uses clever summing tricks to get more accurate results?
In some
2009 Apr 20
2
The assign(paste(...,i),...) idiom
Judging from the traffic on this mailing list, a lot of R beginners
are trying to write things like
assign( paste( "myvar", i), ...)
where they really should probably be writing
myvar[i] <- ...
Do we have any idea where this bizarre habit comes from?
-s
2009 May 27
1
R Books listing on R-Project
I was wondering what the criteria were for including books on the Books
Related to R page <http://www.r-project.org/doc/bib/R-books.html>. (There is
no maintainer listed on this page.)
In particular, I was wondering why the following two books are not listed:
* Andrew Gelman, Jennifer Hill, *Data Analysis Using Regression and
Multilevel/Hierarchical Models*. (CRAN package 'arm')
*
2009 Apr 01
2
Definition of = vs. <-
NOTA BENE: This email is about `=`, the assignment operator (e.g. {a=1}
which is equivalent to { `=`(a,1) } ), not `=` the named-argument syntax
(e.g. f(a=1), which is equivalent to
eval(structure(quote(f(1)),names=c('','a'))).
As far as I can tell from the documentation, assignment with = is precisely
equivalent to assignment with <-. Yet they call different primitives:
>
2009 Apr 01
2
Definition of = vs. <-
NOTA BENE: This email is about `=`, the assignment operator (e.g. {a=1}
which is equivalent to { `=`(a,1) } ), not `=` the named-argument syntax
(e.g. f(a=1), which is equivalent to
eval(structure(quote(f(1)),names=c('','a'))).
As far as I can tell from the documentation, assignment with = is precisely
equivalent to assignment with <-. Yet they call different primitives:
>
2009 Jun 11
2
Tables without names
A table without names displays like a vector:
> unname(table(2:3))
[1] 1 1 1
and preserves the table class (as with unname in general):
> dput(unname(table(2:3)))
structure(c(1L, 1L), .Dim = 2L, class = "table")
Does that make sense? R is not consistent in its treatment of such unname'd
tables:
In plot, they are considered erroneous input:
>
2008 Nov 12
2
Outer, kronecker, etc.
`outer` (and related functions like kronecker) require that their
functional argument operate elementwise on arrays. This means for
example that
outer( 1:2, 3:4, list)
or
outer(1:2,3:4,function(a,b){1})
gives an error.
Is there a version of `outer`/`kronecker`/etc. that takes arbitrary
functions and does its own elementwise mapping? In the first example
above, I'd expect the
2008 Nov 20
4
Dequantizing
I have some data measured with a coarsely-quantized clock. Let's say
the real data are
q<- sort(rexp(100,.5))
The quantized form is floor(q), so a simple quantile plot of one
against the other can be calculated using:
plot(q,type="l"); points(floor(q),col="red")
which of course shows the characteristic stair-step. I would like to
smooth the quantized
2009 May 20
2
Class for time of day?
What is the recommended class for time of day (independent of calendar
date)?
And what is the recommended way to get the time of day from a POSIXct
object? (Not a string representation, but a computable representation.)
I have looked in the man page for DateTimeClasses, in the Time Series
Analysis Task View and in Spector's Data Manipulation book but haven't found
these. Clearly I can
2008 Dec 08
4
R and Scheme
I've read in many places that R semantics are based on Scheme semantics. As
a long-time Lisp user and implementor, I've tried to make this more precise,
and this is what I've found so far. I've excluded trivial things that
aren't basic semantic issues: support for arbitrary-precision integers;
subscripting; general style; etc. I would appreciate corrections or
additions from
2009 Jun 23
1
Documentation/software inconsistency in `:` and seq
In 2.8.1/Windows:
According to ? :
Details:
For numeric arguments 'from:to' is equivalent to 'seq(from, to)' ...
Value:
For numeric arguments, a numeric vector. This will be of type
'integer' if 'from' and 'to' are both integers and representable
in the integer type, otherwise of type 'numeric'....
The first claim
2009 Dec 18
2
Vectorized switch
What is the 'idiomatic' way of writing a vectorized switch statement?
That is, I would like to write, e.g.,
vswitch( c('a','x','b','a'),
a= 1:4,
b=11:14,
100 )
=> c(1, 100, 13, 4 )
equivalent to
ifelse( c('a','x','b','a') ==