Re: [julia-users] Re: Debugging memory use
See https://github.com/timholy/ProfileView.jl, or just inspect Profile.print(C=true) for calls to the garbage collector. This isn't perfect--- you're wondering about allocation, and this is gc---but since running gc is triggered by allocation, this can at least point you in the right direction. A much more likely candidate for your underlying problem is a type-problem. code_typed or TypeCheck.jl may help you find it. --Tim On Friday, March 14, 2014 08:30:12 PM andrew cooke wrote: What would be nice is something that prints current heap size (without consuming any heap itself) that I could sprinkle through the code, so that I could see which statement allocates memory. On Friday, 14 March 2014 23:49:53 UTC-3, andrew cooke wrote: Any tips / pointers / docs on how to do this? I have some code that, according to @time, is using more memory than I expect. How do I work out where the problem is, and reduce the memory use? Is there anything more efficient than writing small tests that focus on particular operations? I suspect my problem is that instances are being created on the heap when I expected them to be on the stack (the main data type hasa single field, which is an integer). Thanks, Andrew
[julia-users] How to change the array to Float64?
I imported an array of text and numbers. An array is a type of Any. I deleted the lines of text. The array is still type Any. How to change the array to Float64? Paul
Re: [julia-users] How to change the array to Float64?
I think that float(Array) should do it. 2014-03-15 12:17 GMT+01:00 paul analyst paul.anal...@mail.com: I imported an array of text and numbers. An array is a type of Any. I deleted the lines of text. The array is still type Any. How to change the array to Float64? Paul -- Med venlig hilsen Andreas Noack Jensen
Re: [julia-users] How to change the array to Float64?
if a is your array: float(a) On Sat, 2014-03-15 at 11:17, paul.anal...@mail.com wrote: I imported an array of text and numbers. An array is a type of Any. I deleted the lines of text. The array is still type Any. How to change the array to Float64? Paul
Re: [julia-users] How to change the array to Float64?
Thx friend! W dniu sobota, 15 marca 2014 12:19:55 UTC+1 użytkownik Andreas Noack Jensen napisał: I think that float(Array) should do it. 2014-03-15 12:17 GMT+01:00 paul analyst paul.a...@mail.com javascript: : I imported an array of text and numbers. An array is a type of Any. I deleted the lines of text. The array is still type Any. How to change the array to Float64? Paul -- Med venlig hilsen Andreas Noack Jensen
[julia-users] Macro leads to slow code(?!)
i have no idea what is happening here. please can someone explain why
these give such different results? thanks, andrew
cat Memory.jl
immutable Fast{U:Unsigned}
i::U
end
+{U:Unsigned}(a::Fast{U}, b::Fast{U}) = Fast{U}(a.i $ b.i)
immutable Slow{I:Unsigned}
i::I
end
for (name, op) in ((:+, $),)
@eval $name{U:Unsigned}(a::Slow{U}, b::Slow{U}) = Slow{U}($op(a.i, b.i
))
end
julia
_
_ _ _(_)_ | A fresh approach to technical computing
(_) | (_) (_)| Documentation: http://docs.julialang.org
_ _ _| |_ __ _ | Type help() to list help topics
| | | | | | |/ _` | |
| | |_| | | | (_| | | Version 0.3.0-prerelease+1998 (2014-03-13 01:20
UTC)
_/ |\__'_|_|_|\__'_| | Commit 9e0e3bd* (2 days old master)
|__/ | x86_64-suse-linux
julia using Memory
Warning: requiring Memory did not define a corresponding module.
julia code_native(+, (Fast{Uint8}, Fast{Uint8}))
.text
Filename: /home/andrew/.julia/v0.3/IntModN/src/Memory.jl
Source line: 5
pushRBP
mov RBP, RSP
xor EDI, ESI
Source line: 5
mov AL, DIL
pop RBP
ret
julia code_native(+, (Slow{Uint8}, Slow{Uint8}))
.text
Filename: /home/andrew/.julia/v0.3/IntModN/src/Memory.jl
Source line: 11
pushRBP
mov RBP, RSP
pushRBX
sub RSP, 40
mov QWORD PTR [RBP - 40], 4
Source line: 11
movabs RBX, 139916932623568
mov RAX, QWORD PTR [RBX]
mov QWORD PTR [RBP - 32], RAX
lea RAX, QWORD PTR [RBP - 40]
mov QWORD PTR [RBX], RAX
mov QWORD PTR [RBP - 16], 0
Source line: 11
mov QWORD PTR [RBP - 24], 13308928
movabs RAX, 139916939396576
callRAX
movabs RCX, 139916917454832
movzx EDI, AL
callRCX
Source line: 11
lea RSI, QWORD PTR [RBP - 24]
Source line: 11
movabs RCX, 139916917189328
mov QWORD PTR [RBP - 16], RAX
mov EDI, 29726432
mov EDX, 2
callRCX
mov AL, BYTE PTR [RAX + 8]
mov RCX, QWORD PTR [RBP - 32]
mov QWORD PTR [RBX], RCX
add RSP, 40
pop RBX
pop RBP
ret
[julia-users] How to find the position of the dot (another character) in the string
I have a dynamic file name in the variable x, such as Julia x namefile.txt How to find the position of the dot (another character) in the string x Paul
[julia-users] Re: How to find the position of the dot (another character) in the string
julia search(abc.d, .) 4:4 julia abc.d[4:4] . http://julia.readthedocs.org/en/latest/stdlib/base/#strings andrew On Saturday, 15 March 2014 09:13:19 UTC-3, paul analyst wrote: I have a dynamic file name in the variable x, such as Julia x namefile.txt How to find the position of the dot (another character) in the string x Paul
Re: [julia-users] Re: Debugging memory use
thanks. i thought i had checked types by adding typed variables (and seeing no change), but i went back and pored over the details of code_typed() and turned up some weird behaviour that seems to be the cause of things. andrew On Saturday, 15 March 2014 07:41:31 UTC-3, Tim Holy wrote: See https://github.com/timholy/ProfileView.jl, or just inspect Profile.print(C=true) for calls to the garbage collector. This isn't perfect--- you're wondering about allocation, and this is gc---but since running gc is triggered by allocation, this can at least point you in the right direction. A much more likely candidate for your underlying problem is a type-problem. code_typed or TypeCheck.jl may help you find it. --Tim On Friday, March 14, 2014 08:30:12 PM andrew cooke wrote: What would be nice is something that prints current heap size (without consuming any heap itself) that I could sprinkle through the code, so that I could see which statement allocates memory. On Friday, 14 March 2014 23:49:53 UTC-3, andrew cooke wrote: Any tips / pointers / docs on how to do this? I have some code that, according to @time, is using more memory than I expect. How do I work out where the problem is, and reduce the memory use? Is there anything more efficient than writing small tests that focus on particular operations? I suspect my problem is that instances are being created on the heap when I expected them to be on the stack (the main data type hasa single field, which is an integer). Thanks, Andrew
Re: [julia-users] Re: GSOC-2014 Implement native julia ODE solver
I have posted some of my ideas about ODE solver in #18https://www.google.com/url?q=https%3A%2F%2Fgithub.com%2FJuliaLang%2FODE.jl%2Fissues%2F18sa=Dsntz=1usg=AFQjCNGKJXDal-ssZV4CCzlL1pBftf0YNQ(Nicksol in Github) .I am waiting for suggestions. Thanks.
[julia-users] calendar , how to calculate the distance in time ?
I have data from a calendar like this: 20130628.2 20130701.3 19970224.4 19990230.5 How to calculate the distance in time (in days) between dates and other similar treatments on the calendar? Paweł
[julia-users] Re: Macro leads to slow code(?!)
aha.
ok, so i was substituting $ rather than :$ for the function, which i
guess means it's resolved to be $(::Any, ::Any) before substitution. if i
use the symbol :$ then things work correctly.
so this works fine:
immutable Fast{U:Unsigned}
i::U
end
+{U:Unsigned}(a::Fast{U}, b::Fast{U}) = Fast{U}(a.i $ b.i)
immutable Slow{I:Unsigned}
i::I
end
for (name, op) in ((:+, :$),)
@eval $name{U:Unsigned}(a::Slow{U}, b::Slow{U}) = Slow{U}(($op)(a.i, b.
i))
end
[julia-users] Re: calendar , how to calculate the distance in time ?
W dniu sobota, 15 marca 2014 13:53:42 UTC+1 użytkownik paul analyst napisał: I have data from a calendar like this: 20130628.2 20130701.3 19970224.4 19990230.5 How to calculate the distance in time (in days) between dates and other similar treatments on the calendar? (dot is separtor ) Paweł
[julia-users] Re: How do you unload a package?
On Friday, March 14, 2014 2:33:27 PM UTC-4, Ivar Nesje wrote: I think you should be able to use the fully qualified name Winston.plot(...) Note also that if are intending to access the functions via the fully qualified names you should do import Winston instead of using Winston You can also define a shortcut via e.g. import Winston const W = Winston W.plot()
Re: [julia-users] Re: How do you unload a package?
I would like to know what is the difference between import and using? When is it advantageous to use either of them? On Mar 15, 2014 3:18 PM, Steven G. Johnson stevenj@gmail.com wrote: On Friday, March 14, 2014 2:33:27 PM UTC-4, Ivar Nesje wrote: I think you should be able to use the fully qualified name Winston.plot(...) Note also that if are intending to access the functions via the fully qualified names you should do import Winston instead of using Winston You can also define a shortcut via e.g. import Winston const W = Winston W.plot()
[julia-users] Re: Error while reading image
https://lh3.googleusercontent.com/-UyyM8VY5puY/UyRYB11L-WI/Bcs/QVZ-mQfaPWg/s1600/Screenshot+from+2014-03-15+18%3A53%3A25.png On Windows I had installed ImageMagick manually. ImageMagick is working fine, so I think. But with Julia, I get the same errors. Then on Ubuntu 12.04, while doing Pkg.build(ImageView) I get the errors as in the image. I have installed ImageMagick on Ubuntu, and added and exported the path too. So the problem ultimately is the same I am unable to read any image, be it either on Windows or Ubuntu. Is it possible that this is hardware based?
[julia-users] Re: Error while reading image
Sorry I forgot this part: Should I try building each package and all its dependencies independently?
Re: [julia-users] Re: How do you unload a package?
On Sat, 2014-03-15 at 13:32, moham...@computer.org wrote: I would like to know what is the difference between import and using? When is it advantageous to use either of them? https://groups.google.com/d/msg/julia-users/xbsdu8Ob4cw/FcJyBZQYfIwJ there Kevin says: Briefly: 1. using MyModule imports all of the exported functions of MyModule into the current namespace 2. import MyModule imports the module name; functions can be called with MyModule.fn(x,y) 3. import MyModule: fn1, fn2 imports the functions fn1 and fn2 into the current namespace 4. require(somefile.jl) loads a particular file. This is useful when: a. you have a script or some bare function definitions you wish to load/execute from another file or at the REPL b. a file defines a module with a different name than the filename (as in my answer to #1 above) On Mar 15, 2014 3:18 PM, Steven G. Johnson stevenj@gmail.com wrote: On Friday, March 14, 2014 2:33:27 PM UTC-4, Ivar Nesje wrote: I think you should be able to use the fully qualified name Winston.plot(...) Note also that if are intending to access the functions via the fully qualified names you should do import Winston instead of using Winston You can also define a shortcut via e.g. import Winston const W = Winston W.plot()
[julia-users] Are there smart pointers in Julia?
Hi everyone, I'm wondering if there are smart pointers like C++ in Julia. Calling C functions often require managing raw pointers allocated in the C functions. After allocating a pointer, I want to wrap it up with a smart pointer, which automatically frees the raw pointer when the smart pointer itself is removed with a garbage collector. As for pointers to an array, the `pointer_to_array` method seems to be suitable in this case ( http://docs.julialang.org/en/latest/stdlib/base/#Base.pointer_to_array). More generally speaking, I want a functionality that is something like a destructor to manage resources more readily. Is it possible to call a function just before a Julia object is destructed? Thanks.
[julia-users] Re: Are there smart pointers in Julia?
Maybe finalizer() will do what you need? http://julia.readthedocs.org/en/latest/stdlib/base/#Base.finalizer On Saturday, March 15, 2014 9:49:56 AM UTC-5, Kenta Sato wrote: Hi everyone, I'm wondering if there are smart pointers like C++ in Julia. Calling C functions often require managing raw pointers allocated in the C functions. After allocating a pointer, I want to wrap it up with a smart pointer, which automatically frees the raw pointer when the smart pointer itself is removed with a garbage collector. As for pointers to an array, the `pointer_to_array` method seems to be suitable in this case ( http://docs.julialang.org/en/latest/stdlib/base/#Base.pointer_to_array). More generally speaking, I want a functionality that is something like a destructor to manage resources more readily. Is it possible to call a function just before a Julia object is destructed? Thanks.
Re: [julia-users] Re: Error while reading image
Images and ImageView are separate. The easier case should be Linux, as my own platform is Ubuntu 12.04 and it works fine. So let's start there. First, does Pkg.build(Images) work? Note: Images, not ImageView! Second, Pkg.build(ImageView) is failing because Pkg.build(Tk) is failing. To me it looks like the build script (in $PKGDIR/Tk/deps/build.jl) is expecting to find a tk8.6 package, but on Ubuntu 12.04 the latest is tk8.5. I'd recommend manually doing sudo apt-get install tk8.5 tcl8.5 Then try Pkg.build(Tk). If that works, try Pkg.build(ImageView). Let us know whether this works, so we know what to do to improve the build script. --Tim On Saturday, March 15, 2014 06:54:56 AM Siddha Ganju wrote: Sorry I forgot this part: Should I try building each package and all its dependencies independently?
[julia-users] Re: Are there smart pointers in Julia?
Thanks for your reply.
I didn't know finalizer(), and that seemed just to be the thing I wanted.
Sadly, I couldn't use it for freeing a pointer:
julia finalizer(c_malloc(1024), c_free)
ERROR: objects of type Ptr{None} cannot be finalized
And this also wouldn't work:
immutable SmartPointer{T}
pointer::Ptr{T}
function SmartPointer(p::Ptr{T})
smart_p = new(p)
finalizer(smart_p, p - c_free(p.pointer))
end
end
p = SmartPointer{Uint8}(convert(Ptr{Uint8}, c_malloc(1024)))
Am I doing something wrong?
On Sunday, March 16, 2014 12:12:31 AM UTC+9, Patrick O'Leary wrote:
Maybe finalizer() will do what you need?
http://julia.readthedocs.org/en/latest/stdlib/base/#Base.finalizer
On Saturday, March 15, 2014 9:49:56 AM UTC-5, Kenta Sato wrote:
Hi everyone,
I'm wondering if there are smart pointers like C++ in Julia.
Calling C functions often require managing raw pointers allocated in the
C functions.
After allocating a pointer, I want to wrap it up with a smart pointer,
which automatically frees the raw pointer when the smart pointer itself is
removed with a garbage collector.
As for pointers to an array, the `pointer_to_array` method seems to be
suitable in this case (
http://docs.julialang.org/en/latest/stdlib/base/#Base.pointer_to_array).
More generally speaking, I want a functionality that is something like a
destructor to manage resources more readily.
Is it possible to call a function just before a Julia object is
destructed?
Thanks.
Re: [julia-users] Re: Are there smart pointers in Julia?
The Julia GC doesn't track immutable types, so it can't finalize them. You
must use a regular type if you want it to be tracked by the GC.
On Sat, Mar 15, 2014 at 3:44 PM, Kenta Sato bicycle1...@gmail.com wrote:
Thanks for your reply.
I didn't know finalizer(), and that seemed just to be the thing I wanted.
Sadly, I couldn't use it for freeing a pointer:
julia finalizer(c_malloc(1024), c_free)
ERROR: objects of type Ptr{None} cannot be finalized
And this also wouldn't work:
immutable SmartPointer{T}
pointer::Ptr{T}
function SmartPointer(p::Ptr{T})
smart_p = new(p)
finalizer(smart_p, p - c_free(p.pointer))
end
end
p = SmartPointer{Uint8}(convert(Ptr{Uint8}, c_malloc(1024)))
Am I doing something wrong?
On Sunday, March 16, 2014 12:12:31 AM UTC+9, Patrick O'Leary wrote:
Maybe finalizer() will do what you need? http://julia.readthedocs.org/
en/latest/stdlib/base/#Base.finalizer
On Saturday, March 15, 2014 9:49:56 AM UTC-5, Kenta Sato wrote:
Hi everyone,
I'm wondering if there are smart pointers like C++ in Julia.
Calling C functions often require managing raw pointers allocated in the
C functions.
After allocating a pointer, I want to wrap it up with a smart pointer,
which automatically frees the raw pointer when the smart pointer itself is
removed with a garbage collector.
As for pointers to an array, the `pointer_to_array` method seems to be
suitable in this case (http://docs.julialang.org/en/
latest/stdlib/base/#Base.pointer_to_array).
More generally speaking, I want a functionality that is something like a
destructor to manage resources more readily.
Is it possible to call a function just before a Julia object is
destructed?
Thanks.
Re: [julia-users] Re: Are there smart pointers in Julia?
You are quite right!
Changing `immutable` to `type` fixed the problem:
type SmartPointer{T}
pointer::Ptr{T}
function SmartPointer(p::Ptr{T})
smart_p = new(p)
finalizer(smart_p, p - c_free(p.pointer))
smart_p
end
end
This seems to work perfectly, prevents the memory leak in my sample code.
Thanks a lot!
On Sunday, March 16, 2014 12:52:00 AM UTC+9, Jameson wrote:
The Julia GC doesn't track immutable types, so it can't finalize them. You
must use a regular type if you want it to be tracked by the GC.
On Sat, Mar 15, 2014 at 3:44 PM, Kenta Sato bicyc...@gmail.comjavascript:
wrote:
Thanks for your reply.
I didn't know finalizer(), and that seemed just to be the thing I wanted.
Sadly, I couldn't use it for freeing a pointer:
julia finalizer(c_malloc(1024), c_free)
ERROR: objects of type Ptr{None} cannot be finalized
And this also wouldn't work:
immutable SmartPointer{T}
pointer::Ptr{T}
function SmartPointer(p::Ptr{T})
smart_p = new(p)
finalizer(smart_p, p - c_free(p.pointer))
end
end
p = SmartPointer{Uint8}(convert(Ptr{Uint8}, c_malloc(1024)))
Am I doing something wrong?
On Sunday, March 16, 2014 12:12:31 AM UTC+9, Patrick O'Leary wrote:
Maybe finalizer() will do what you need? http://julia.readthedocs.org/
en/latest/stdlib/base/#Base.finalizer
On Saturday, March 15, 2014 9:49:56 AM UTC-5, Kenta Sato wrote:
Hi everyone,
I'm wondering if there are smart pointers like C++ in Julia.
Calling C functions often require managing raw pointers allocated in
the C functions.
After allocating a pointer, I want to wrap it up with a smart pointer,
which automatically frees the raw pointer when the smart pointer itself is
removed with a garbage collector.
As for pointers to an array, the `pointer_to_array` method seems to be
suitable in this case (http://docs.julialang.org/en/
latest/stdlib/base/#Base.pointer_to_array).
More generally speaking, I want a functionality that is something like
a destructor to manage resources more readily.
Is it possible to call a function just before a Julia object is
destructed?
Thanks.
[julia-users] How to access to a generic bitstype?
Hi, I am trying to access to members of a structure 'imported' via ccall and where Clang.jl declared the types as being bitstype int(WORD_SIZE/8)*sizeof(Cdouble)*2 Array_2_Cdouble bitstype int(WORD_SIZE/8)*sizeof(Uint8)*80 Array_80_Uint8 But I now am incapable of accessing their contents. Below is an example of what I tried (also tried several other variations of this) julia typeof(hdr.title) Array_80_Uint8 julia typeof(hdr.inc) Array_2_Cdouble julia hdr.inc[1] ERROR: no method getindex(Array_2_Cdouble, Int64) How can access those guys? Thanks
[julia-users] Re: GSOC-2014 Implement native julia ODE solver
I have extended SortingAlgorithms.jlhttps://github.com/JuliaLang/SortingAlgorithms.jlto support for selection sort .See https://github.com/JuliaLang/SortingAlgorithms.jl/pull/4Implement of Selection sort https://github.com/JuliaLang/SortingAlgorithms.jl/pull/4for details.I know selection sort is a very simple algorithms.But i will make some contributions in upcoming days.Also i have posted at my ideas about GSOC ODE solver project in #18https://github.com/JuliaLang/ODE.jl/issues/18. On Thursday, March 13, 2014 8:49:14 PM UTC+5:30, Ivar Nesje wrote: We look forward to see posted julia code. Pull Requests is a great way to show your skills, whether they are accepted or not. Most of our sorting algorithms have been moved to SortingAlgorithms.jlhttps://github.com/JuliaLang/SortingAlgorithms.jl, so I would expect that it would be hard get a new algorithm accepted into base. ODE solvers will be developed in the ODE.jlhttps://github.com/JuliaLang/ODE.jlpackage repository. We have just tagged version 0.1.0, and made braking changes to the APIhttps://github.com/JuliaLang/ODE.jl/blob/master/doc/api.mdthat will be effective when the next version is released, so if anyone who has an interest in ODE solvers and APIs, could give their input, that would be fantastic. I don't understand your question about Runge Kutta formulas, but I think the guiding factor with regards to what algorithms we use is the interest of our contributors. If the algorithm is sound, well implemented, useful, and it does not fit better in one of the other packages, it will be accepted in ODE.jl Regards Ivar kl. 10:09:16 UTC+1 torsdag 13. mars 2014 skrev Niluka Piyasinghe følgende: Hi everyone, This is about ODE solver project in the GSOC ideas page.I read https://github.com/JuliaLang/julia/issues/75 and i want to know that i could only make algorithms based on Runge Kutta formulas or i could any use any methods also for this project.I would like to contact a mentor to discuss about ideas further. I have learned about julia over past months and I am trying to contribute to julia before GSOC project by extending sort.jlhttps://github.com/JuliaLang/julia/blob/master/base/sort.jl package to support for Bucket sort and some other sorting algorithms as well.I will post my codes in few days. Thank you! Niluka Piyasinghe Department of computer engineering, University of Peradeniya.
[julia-users] Re: Cairo build error
Anyone? Any idea? This error prevents using Julia graphics. Does it mean that nobody uses graphics in Julia, or is there something wrong with my installation, which I could fix somehow? On Sunday, March 9, 2014 11:35:26 AM UTC-6, Laszlo Hars wrote: forgot to say: Win7 x64 Julia Version 0.3.0-prerelease+1400
Re: [julia-users] How to access to a generic bitstype?
The current version of Clang.jl will create an immutable like: immutable Array_2_Cdouble d1::Cdouble d2::Cdouble end which can be indexed numerically as expected. On Sat, Mar 15, 2014 at 1:54 PM, J Luis jmfl...@gmail.com wrote: Hi, I am trying to access to members of a structure 'imported' via ccall and where Clang.jl declared the types as being bitstype int(WORD_SIZE/8)*sizeof(Cdouble)*2 Array_2_Cdouble bitstype int(WORD_SIZE/8)*sizeof(Uint8)*80 Array_80_Uint8 But I now am incapable of accessing their contents. Below is an example of what I tried (also tried several other variations of this) julia typeof(hdr.title) Array_80_Uint8 julia typeof(hdr.inc) Array_2_Cdouble julia hdr.inc[1] ERROR: no method getindex(Array_2_Cdouble, Int64) How can access those guys? Thanks
Re: [julia-users] Re: Cairo build error
Is everything updated (Pkg.update())? There aren't a huge number of users on Windows, but I know *some* people other than me are using Cairo.jl on Windows. Are you using version 0.2, or a prerelease build? On Sat, Mar 15, 2014 at 2:25 PM, Laszlo Hars laszloh...@gmail.com wrote: Anyone? Any idea? This error prevents using Julia graphics. Does it mean that nobody uses graphics in Julia, or is there something wrong with my installation, which I could fix somehow? On Sunday, March 9, 2014 11:35:26 AM UTC-6, Laszlo Hars wrote: forgot to say: Win7 x64 Julia Version 0.3.0-prerelease+1400
Re: [julia-users] How to access to a generic bitstype?
I've just created a new set of wrapper files against gmt 5.1 using the latest version of Clang.jl, and gave you commit access to the repo. https://github.com/ihnorton/GMT.jl (I don't have a build of it though so I haven't tested anything) On Sat, Mar 15, 2014 at 2:53 PM, Isaiah Norton isaiah.nor...@gmail.comwrote: The current version of Clang.jl will create an immutable like: immutable Array_2_Cdouble d1::Cdouble d2::Cdouble end which can be indexed numerically as expected. On Sat, Mar 15, 2014 at 1:54 PM, J Luis jmfl...@gmail.com wrote: Hi, I am trying to access to members of a structure 'imported' via ccall and where Clang.jl declared the types as being bitstype int(WORD_SIZE/8)*sizeof(Cdouble)*2 Array_2_Cdouble bitstype int(WORD_SIZE/8)*sizeof(Uint8)*80 Array_80_Uint8 But I now am incapable of accessing their contents. Below is an example of what I tried (also tried several other variations of this) julia typeof(hdr.title) Array_80_Uint8 julia typeof(hdr.inc) Array_2_Cdouble julia hdr.inc[1] ERROR: no method getindex(Array_2_Cdouble, Int64) How can access those guys? Thanks
Re: [julia-users] Re: Cairo build error
Thanks, Isaiah, for your response. Below is what I see. ~~~ Version 0.3.0-prerelease+1400 (2014-02-05 19:14 UTC) Commit 6f3a4b6* (37 days old master) x86_64-w64-mingw32 ~~~ julia Pkg.update() INFO: Updating METADATA... INFO: Computing changes... INFO: No packages to install, update or remove ~~~ julia using Cairo ERROR: could not open file ...\.julia\Cairo\src\../deps/deps.jl while loading ...\.julia\Cairo\src\Cairo.jl, in expression starting on line 3 ~~~ julia Pkg.add(Cairo) INFO: Nothing to be done ~~~ I even tried to build Cairo manually: ~~~ julia include(homedir() * \\.julia\\Cairo\\deps\\build.jl) ERROR: i not defined in next at env.jl:127 in merge! at dict.jl:77 while loading ...\.julia\Cairo\deps\build.jl, in expression starting on line 225 ~~~ I also tried renaming the Cairo directory and add the Cairo package again. It used to get back to the previous state, but today I got: ~~~ julia Pkg.add(Cairo) ERROR: unknown package Cairo in error at error.jl:21 in anonymous at multi.jl:47 ~~~ It looks like a mess...
Re: [julia-users] How to access to a generic bitstype?
Thank you for doing this. See my first issue there, which in fact is more a Clang.jl issue Sábado, 15 de Março de 2014 19:33:54 UTC, Isaiah escreveu: I've just created a new set of wrapper files against gmt 5.1 using the latest version of Clang.jl, and gave you commit access to the repo. https://github.com/ihnorton/GMT.jl (I don't have a build of it though so I haven't tested anything) On Sat, Mar 15, 2014 at 2:53 PM, Isaiah Norton isaiah...@gmail.comjavascript: wrote: The current version of Clang.jl will create an immutable like: immutable Array_2_Cdouble d1::Cdouble d2::Cdouble end which can be indexed numerically as expected. On Sat, Mar 15, 2014 at 1:54 PM, J Luis jmf...@gmail.com javascript:wrote: Hi, I am trying to access to members of a structure 'imported' via ccall and where Clang.jl declared the types as being bitstype int(WORD_SIZE/8)*sizeof(Cdouble)*2 Array_2_Cdouble bitstype int(WORD_SIZE/8)*sizeof(Uint8)*80 Array_80_Uint8 But I now am incapable of accessing their contents. Below is an example of what I tried (also tried several other variations of this) julia typeof(hdr.title) Array_80_Uint8 julia typeof(hdr.inc) Array_2_Cdouble julia hdr.inc[1] ERROR: no method getindex(Array_2_Cdouble, Int64) How can access those guys? Thanks
Re: [julia-users] Unexpected type behaviour in arithmetic operations
I don’t this would be a great way to handle 32-bit compatibility since the
cases where you want 64-bit integers are cases where you don’t want wrapping to
happen until you get all the way to 2^64 numbers.
— John
On Mar 13, 2014, at 7:29 PM, Ben bber...@gmail.com wrote:
Now that I think about it, can you do 32/64 bit compatability this way too?
On Thursday, March 13, 2014 10:26:11 PM UTC-4, Ben wrote:
Yes, that's what I meant. I just realized all you need to do % 2^32 or
0xff whenever you add... disregard that lol
On Thursday, March 13, 2014 10:10:45 PM UTC-4, John Myles White wrote:
By integer overflow, do you mean wrapping arithmetic like you’d get from
doing everything mod N for some integer N?
— John
On Mar 13, 2014, at 7:08 PM, Ben bbe...@gmail.com wrote:
Sorry if this is hijacking the thread, but I'm wondering is there a way to
force integer overflow? I think it would be useful for things like sliding
window protocols.
Also, is there a way to release julia code that works on both 32 bit and 64
bit machines? (it sounds like annotating types as 32-bit isn't enough)
Great language by the way!
On Saturday, March 1, 2014 6:30:00 PM UTC-5, Stefan Karpinski wrote:
There's been many discussions of this before. The basic premise is simple:
all integer arithmetic is done in your native word size. When you store that
result somewhere, it is converted to the storage type. Since you can do most
operations on Int64s and then convert to Int32 and get the exact same
answer, this works out fine. I have yet to hear a really convincing argument
for why we shouldn't just do everything in native int size.
On Sat, Mar 1, 2014 at 6:26 PM, Stefan Karpinski ste...@karpinski.org
wrote:
On Fri, Feb 28, 2014 at 8:49 AM, andrew cooke and...@acooke.org wrote:
defining
Base.promote_rule(::Type{Int32}, ::Type{Int32}) = Int32
doesn't help either, and i'm not sure why.
Promotion only applies when the types don't already have the same type. When
you write int32(1) + int32(2) you call this method:
https://github.com/JuliaLang/julia/blob/master/base/int.jl#L16, which
explicitly converts the values to your native Int type and then does the
work.
Re: [julia-users] Re: Cairo build error
I removed every piece of the Julia installation, and reinstalled in new directories the newest prerelease: Version 0.3.0-prerelease+1897 (2014-03-07 09:35 UTC) Now Cairo (and Tk) installs w/o errors. I just wish Julia gave more informative error messages. (I spent two days struggling with the seemingly impossible task to get Tk to work.) Sorry for the noise! (The moral: if something fails, try to re-install everything.)
Re: [julia-users] Re: Cairo build error
That is the software installation version of turning it off and on again. On Mar 15, 2014, at 9:27 PM, Laszlo Hars laszloh...@gmail.com wrote: I removed every piece of the Julia installation, and reinstalled in new directories the newest prerelease: Version 0.3.0-prerelease+1897 (2014-03-07 09:35 UTC) Now Cairo (and Tk) installs w/o errors. I just wish Julia gave more informative error messages. (I spent two days struggling with the seemingly impossible task to get Tk to work.) Sorry for the noise! (The moral: if something fails, try to re-install everything.)
Re: [julia-users] Re: Error while reading image
Yes, that works absolutely fine. But every-time I have to do using ImageView I have to build it first. Pkg.build(Images) works absolutely fine. Thank you for your help. On 3/15/14, Tim Holy tim.h...@gmail.com wrote: Images and ImageView are separate. The easier case should be Linux, as my own platform is Ubuntu 12.04 and it works fine. So let's start there. First, does Pkg.build(Images) work? Note: Images, not ImageView! Second, Pkg.build(ImageView) is failing because Pkg.build(Tk) is failing. To me it looks like the build script (in $PKGDIR/Tk/deps/build.jl) is expecting to find a tk8.6 package, but on Ubuntu 12.04 the latest is tk8.5. I'd recommend manually doing sudo apt-get install tk8.5 tcl8.5 Then try Pkg.build(Tk). If that works, try Pkg.build(ImageView). Let us know whether this works, so we know what to do to improve the build script. --Tim On Saturday, March 15, 2014 06:54:56 AM Siddha Ganju wrote: Sorry I forgot this part: Should I try building each package and all its dependencies independently? -- Siddha Ganju 3rd Year Undergraduate Student Computer Science and Engineering Department National Institute of Technology, Hamirpur - 177005 E-mail Id : siddhaga...@gmail.com
