I know this is not a solution to the problem, but what do you mean by "lost
code" ? Couldn't you just copy the text in the browser to a local editor?
On Monday, November 23, 2015 at 6:09:45 AM UTC+1, Thomas Moore wrote:
>
> I've been really enjoying using JuliaBox for some simulations related to
I've been really enjoying using JuliaBox for some simulations related to my
PhD work. The fact that I can work on my code *anywhere* - in the office,
the library, at home - with no worries about which version of Julia I'm
using is fantastic!
However, I've noticed that JuliaBox often disconnect
Can you provide a link to the issue when ready? I am interested in
following it as I will have similar questions soon. Thanks
On Monday, November 23, 2015 at 11:36:07 AM UTC+8, Andre Bieler wrote:
>
> I ll open an issue on this.
>
So I did a more fair comparison. (file attached)
Doing the same decomposition and re-assembly as for the
hdf5 version.
It is about a factor of 2 faster than the hdf5
version now.
Tim, is this about what you would expect?
(I thought it should be even faster than this)
I ll open an issue on this.
Hi All,
I have a pretty easy question about how/why the svd() behaves how it does.
Why are my U and V matrices always a factor of -1 from the textbook
examples? I'm just getting my feet wet with all this, so I wanted to check
what the function returns vs what the textbook says the answers wou
Why not use
foo{I<:Integer}(u::UnitRange{I}) = 1
On Sunday, November 22, 2015 at 7:38:29 AM UTC-5, andrew cooke wrote:
>
>
> Out of my depth here - no idea if this is a bug or me...
>
> julia> foo{I<:Integer,U<:UnitRange{I}}(u::U) = 1
> ERROR: TypeError: UnitRange: in T, expected T<:Real, got Uni
Hi Andrew,
The issue is being tracked here:
https://github.com/JuliaLang/julia/issues/6984, and the current milestone
is v0.5. My understanding is that the syntax being proposed is not the same
as the one you used above, but that triangular dispatch will nonetheless be
possible as a special ca
Thank you, I should have checked the issues list first.
On Fri, Nov 20, 2015 at 4:13 PM, Milan Bouchet-Valat
wrote:
> Le vendredi 20 novembre 2015 à 04:54 -0800, Michele Zaffalon a écrit :
> > Should `linspace` act as an array for `repeat`?
> Yes, the signature of repeat() is clearly too strict.
As you could see, the reduction operator can be omitted if it is not
needed. In that case, the loop executes asynchronously,
i.e. it spawns independent tasks on all available workers and returns an
array of RemoteRef (page 399)
immediately without waiting for completion. The caller can wait for t
Le dimanche 22 novembre 2015 à 14:08 -0800, Martin Kuzma a écrit :
>
>
> Hi, i am new to Julia and i am little bit confused about type
> conversion.
> In the docs is written following:
>
> When appended to a variable in a statement context, the :: operator
> means something a bit different: it
I can replicate this, and it's awe-inspiring just how bad it is:
Using HDF5: 0.07s
Using the serializer: 6.3s
Robert, this was with `julia -p 2` (you won't see this if you don't have
multiple processes).
In a sense it's not a fair comparison: you're effectively creating a custom
serialize
Hi, i am new to Julia and i am little bit confused about type conversion.
In the docs is written following:
When appended to a *variable* in a statement context, the :: operator means
something a bit different: it declares the variable to always have the
specified type, like a type declaratio
Im not quite sure what deeper purpose the function indexpids has.
As far as I noticed when calling remotecall(p,f,arg) then in the function f
indexpids always returns p-1
Is that correct or are there applications where its not as clear?
In ODE.jl, I've used
vcat_nosplat(y) = eltype(y[1])[el[1] for el in y] # Does vcat(y...) without the
splatting
I think the eltype might not be needed. There may be better ways though.
On Sun, 2015-11-22 at 14:04, Cedric St-Jean wrote:
> I have a big vector of vectors. Is there any way to vcat
If we are already at this, it would be cool to have versions with Gray ordering.
Something like:
for (i1,i2) in permutations(vector,indices=true,Gray=true)
theperm[[i1,i2]] = theperm[[i2,i1]]
@show theperm
end
would go over all permutations.
The syntax would be different and t
Not really. An array is much better for this.
On Sun, Nov 22, 2015 at 2:28 PM, digxx wrote:
> Manually I can do:
> arr1=...
> arr2=...
> arr3=...
> and so on
> If I have a loop over i can i construct in each loop a new variable
> symbolically like this:
> arr*string(i)=... ?
>
>
Manually I can do:
arr1=...
arr2=...
arr3=...
and so on
If I have a loop over i can i construct in each loop a new variable
symbolically like this:
arr*string(i)=... ?
Yes, Set is implemented using a hash table. ObjectIdDict is for situations
where you want to hash based on object identity (===) rather than equality
(isequal).
On Sunday, November 22, 2015, Leonardo wrote:
> Of course I can use Dict (ObjectIdDict is a sort of Dict), adding entries
> as previous
Of course I can use Dict (ObjectIdDict is a sort of Dict), adding entries
as previously written.
Set is even better, but elements of Set are accessed with hash?
E.g. "hello" in s of your example is executed in constant or linear time?
Thanks
Leonardo
P.S. for my clarification: what is reccomen
Also, "unique" permutations require a notion of equality, and which is
hard to define in general (classic essay is [1], about Common Lisp,
but applies to Julia mutatis mutandis). At least Julia has bits types
for numbers, which makes life a bit easier.
Whether one picks is, isequal, or == for comp
I think julia more than other languages has a tendency to stick with
mathematical consistency over some user preferences, which is good. For
that reason, I would be in favor of permutations remaining as is but having
multiset_permutations renamed to something more intuitive, like
uniqueperms, or un
what were your timings?
i get:
size(particles) = (30,)
size(particles) = (30,)
0.060457 seconds (300.58 k allocations: 48.089 MB)
(30,)
(30,)
0.57 seconds (27 allocations: 912 bytes)
On Thursday, November 19, 2015 at 10:11:47 PM UTC+1, Andre Bieler wrote:
>
> I have
Why can't you use Set or Dict?
julia> s = Set{ASCIIString}()
Set{ASCIIString}()
julia> push!(s, "hello")
Set(ASCIIString["hello"])
julia> push!(s, "world")
Set(ASCIIString["hello","world"])
julia> "hello" in s
true
julia> "nope" in s
false
--Tim
On Sunday, November 22, 2015 09:58:31 AM Leona
Hello,
I'm looking for an Hash table in Julia (or Hash Set, how is called in other
programming languages), to efficiently check existence of an element in
set, but I haven't found it.
I've found ObjectIdDict as alternative, defined as:
ObjectIdDict <: Dict{Any,Any}
where key and value are equals,
As I noted just a few days ago, I have written a small package to
compute frequency tables from arbitrary arrays, with an optimized
method for pooled data arrays :
https://github.com/nalimilan/FreqTables.jl
I've just pushed a fiw so it should now work on 0.4 (but not with 0.3).
We could easily ad
Ok, I hope that exchange could contribute to bring news ideas to improve
DataFrames although there are other way to do it, like convert a DataFrame
or a row into array. Thank you for your help !
Le dimanche 22 novembre 2015 15:48:37 UTC+1, tshort a écrit :
>
> Contributions/pull requests from fo
ok (i thought there might be something more succinct, but i guess
multimethods mean it's not simple). thanks. andrew
On Sunday, 22 November 2015 11:24:57 UTC-3, Yichao Yu wrote:
>
> > Can I do this, or do I need to pull the function out into a separate
> name?
>
> invoke
>
> >
> > Thanks,
> >
Currently you can use `invoke`, although its future is uncertain:
https://github.com/JuliaLang/julia/pull/13123
--Tim
On Sunday, November 22, 2015 06:10:38 AM andrew cooke wrote:
> In OO programming it's quite common to delegate work to a supertype from
> within a method. The syntax might be so
Contributions/pull requests from folks that need that are welcome. I don't
have that need. For row operations, I can generally get by with loops or
`@byrow!` in DataFramesMeta.
On Nov 22, 2015 8:23 AM, "Fred" wrote:
> Yes, it is a good solution, but it means that DataFrames cannot be used to
> do
> Can I do this, or do I need to pull the function out into a separate name?
invoke
>
> Thanks,
> Andrew
>
In OO programming it's quite common to delegate work to a supertype from
within a method. The syntax might be something like:
class Foo {
method bar(...) {
...
super.bar(...)
...
}
}
I'd like to do the same in Julia, but don't know how to. For example, I
may h
See https://github.com/JuliaLang/julia/issues/14099 for further discussion.
a! ok, thanks.
On Sunday, 22 November 2015 10:40:04 UTC-3, Simon Danisch wrote:
>
> As far as I know, triangular dispatch hasn't hit the shores yet
> (especially not in 0.4).
> This sort of works, because I is actually a global variable in Base (I::
> UniformScaling{Int64})
> Try some other
I agree that this is a documentation bug, but there is an easy way to split
on any isspace character:
julia> const spaces = filter(isspace, Char(0):Char(0x10));
julia> split("Ｔｉｍｅ ｆｌｉｅｓ ｌｉｋｅ ａｎ ａｒｒｏｗ．（光陰矢の如し）", spaces)
5-element Array{SubString{UTF8String},1}:
"Ｔｉｍｅ"
"ｆｌｉｅｓ"
As far as I know, triangular dispatch hasn't hit the shores yet (especially
not in 0.4).
This sort of works, because I is actually a global variable in Base (I::
UniformScaling{Int64})
Try some other name, and it will tell you that the variable is undefined,
as expected.
Best,
Simon
Am Sonntag,
Yes, it is a good solution, but it means that DataFrames cannot be used to
do some calculations by rows, it is a severe limitation. An equivalent of
colwise()
whould be very usefull.
Le dimanche 22 novembre 2015 14:11:21 UTC+1, tshort a écrit :
>
> I'd convert the whole DataFrame to a matrix an
I was waiting for someone others to comment on it. But since no one did it,
I'll try it.
Your solution is just fine for personal use. But imagine that you are
making an application working on ObjectiveFunction. For your clients to
profit from your application, they should inherit a concrete type f
I'd convert the whole DataFrame to a matrix and use a loop over rows.
On Nov 22, 2015 2:54 AM, "Fred" wrote:
> In my last example, the function mean() is not well chosen. In fact, what
> I would like to calculate is a statistical test line by lline, like TTest,
> or Wilcoxon. This is why I need t
I have a big vector of vectors. Is there any way to vcat/hcat them without
splatting?
arr_of_arr = Vector[[1],[2,3],[4,5]]
vcat(arr_of_arr...)
I'm asking because splatting big arrays is a performance issue (and IIRC it
blows the stack at some point).
Out of my depth here - no idea if this is a bug or me...
julia> foo{I<:Integer,U<:UnitRange{I}}(u::U) = 1
ERROR: TypeError: UnitRange: in T, expected T<:Real, got UniformScaling{
Int64}
Version 0.4.1-pre+22 (2015-11-01 00:06 UTC)
Thanks, Andrew
Le samedi 21 novembre 2015 à 11:05 -0800, digxx a écrit :
> Though this is not a big issue since I can convert the strings to
> double as I want IDL still tells me the following
OK, so this is actually an issue in the interaction between Julia
-produced CSV and how IDL interprets it. Note that CSV
`split` already has hooks for using other splitters. To achieve the UTF8
space splitting functionality, one can leverage the `isspace` function and
add some decorations. For example:
type FuncSplitter
pred::Function
end
function Base.search(s::AbstractString, splt::FuncSplitter, start::In
I plan to add a sentence to the doc: If ``FRUIT`` is defined in a module
``Food``, its instances should be refered as ``Food.apple`` for example
instead of ``FRUIT.apple``.
But I don't know how to do it. Maybe someone could do it instead of me.
On Sunday, November 22, 2015 at 12:21:53 PM UTC+1
On 22 November 2015 at 01:46, wrote:
>
> On Sunday, November 22, 2015 at 10:02:03 AM UTC+10, James Gilbert wrote:
>>
>> The spaces in your string are '\u3000' the ideographic space.
>> isspace('\u3000') returns true, and split(s) is supposed to split on all
>> space characters, so I think this mi
Hi Arin,
It would be helpful to have more details about the input (a dataframe?) and
output (a two-by-two table or a table indexed by categories?). Some code to
give context to the question would be even more help (possibly in another
language, such as R).
Having said this, here is a starting p
Sorry, just found that one can use `tmp.orange` to refer the value.
On Sunday, November 22, 2015 at 12:12:56 PM UTC+1, Sisyphuss wrote:
>
> Let's see this example:
> ```
> module tmp
>
> export FRUIT, f, apple
>
> @enum FRUIT apple=1 orange=2 kiwi=3
>
> f(x::FRUIT) = "I'm a FRUIT with value: $(I
Let's see this example:
```
module tmp
export FRUIT, f, apple
@enum FRUIT apple=1 orange=2 kiwi=3
f(x::FRUIT) = "I'm a FRUIT with value: $(Int(x))"
end
```
f(apple) works fine
f(orange) doesn't work
f(FRUIT.apple) doesn't work either.
An enumerate type is of no use, if can't use its values.
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