[julia-users] Re: Can not require a precompiled package
Can you require a pre-compiled package in your Julia? If yes, could you please tell me your version? Thanks! On Friday, November 7, 2014 3:10:15 PM UTC+1, xiong...@gmail.com wrote: After I precompiled a package in userimg.jl, require(Package_name) is always blocked without any response. But using and import the package works fine. That's weired. If I interrupt require-ing package by Ctrl-C, the breaking point always be: julia require(DataFrames) ^CERROR: interrupt in wait at ./task.jl:277 in wait at ./task.jl:194 in wait_full at ./multi.jl:602 in wait_ref at ./multi.jl:755 in wait_ref_3B_7574 at /home/MyDir/programs/julia/usr/bin/../lib/julia/sys.so in call_on_owner at ./multi.jl:749 in wait at ./multi.jl:756 in _require at ./loading.jl:62 in require at ./loading.jl:52 in require_3B_7273 at /home/MyDir/programs/julia/usr/bin/../lib/julia/sys.so FYI: julia versioninfo() Julia Version 0.4.0-dev+728 Commit f7172d3* (2014-09-22 12:08 UTC) Platform Info: System: Linux (x86_64-redhat-linux) CPU: Intel(R) Xeon(R) CPU E7- 4830 @ 2.13GHz WORD_SIZE: 64 BLAS: libopenblas (USE64BITINT NO_AFFINITY NEHALEM) LAPACK: libopenblas LIBM: libopenlibm LLVM: libLLVM-3.3
Re: [julia-users] Full blown GUI programming with Julia+JS
What's best is relative ;-) I personally haven't used IE in years, so I wouldn't know. Of course ;). For the record, neither have I (which would explain my outdated info, see below) On Thursday, 6 November 2014 20:23:46 UTC+1, Jameson wrote: Completely OT and [citation needed]. However, fwiw, IE didn't add SVG support until IE9 Sorry, sorry. I was just joking because I remember IE being the first to support hardware accelerated SVG and surprising everyone by beating the other browsers in this department [0]. My own tests at the time had similar results. But that was a lot of versions ago, if I run some more recent benchmarks[1][2], they're much closer. On Windows, that is -IIRC Firefox doesn't have hardware acceleration on Linux yet, for example. Anyway, the only real issue seems to be that SVG still still doesn't scale very well[3] (in terms of elements, not resolution of course), so as long as you don't have too many GUI elements it shouldn't matter much. [0] http://joeloughton.com/blog/web-applications/svg-vs-canvas-performance/ [1] http://jsperf.com/html-vs-svg-vs-canvas/26 (FF beats Chrome beats IE on my machine) [2] https://www.mapbox.com/osmdev/2012/11/20/getting-serious-about-svg/ - (check the unrounded/rounded performance links, Chrome beats IE beats FF on my machine) [3] http://frozeman.de/blog/2013/08/why-is-svg-so-slow/
Re: [julia-users] Re: Julia talk at EuroSciPy 2014
Thanks for the link. Great talk indeed. I actually didn't know that you could type \alpha then the tab key and actually get the Greek character α. It also works in the REPL. It's great. On Friday, 7 November 2014 06:48:22 UTC+1, Michele Zaffalon wrote: This is a great talk: can a link to the video be posted in http://julialang.org/learning/?
Re: [julia-users] Re: Can not require a precompiled package
Out of curiosity, why do you want to do this? Once you've got the module available, I would think you'd just refer to it by module name? --Tim On Friday, November 07, 2014 06:25:55 AM xiongji...@gmail.com wrote: Can you require a pre-compiled package in your Julia? If yes, could you please tell me your version? Thanks! On Friday, November 7, 2014 3:10:15 PM UTC+1, xiong...@gmail.com wrote: After I precompiled a package in userimg.jl, require(Package_name) is always blocked without any response. But using and import the package works fine. That's weired. If I interrupt require-ing package by Ctrl-C, the breaking point always be: julia require(DataFrames) ^CERROR: interrupt in wait at ./task.jl:277 in wait at ./task.jl:194 in wait_full at ./multi.jl:602 in wait_ref at ./multi.jl:755 in wait_ref_3B_7574 at /home/MyDir/programs/julia/usr/bin/../lib/julia/sys.so in call_on_owner at ./multi.jl:749 in wait at ./multi.jl:756 in _require at ./loading.jl:62 in require at ./loading.jl:52 in require_3B_7273 at /home/MyDir/programs/julia/usr/bin/../lib/julia/sys.so FYI: julia versioninfo() Julia Version 0.4.0-dev+728 Commit f7172d3* (2014-09-22 12:08 UTC) Platform Info: System: Linux (x86_64-redhat-linux) CPU: Intel(R) Xeon(R) CPU E7- 4830 @ 2.13GHz WORD_SIZE: 64 BLAS: libopenblas (USE64BITINT NO_AFFINITY NEHALEM) LAPACK: libopenblas LIBM: libopenlibm LLVM: libLLVM-3.3
Re: [julia-users] Re: Julia talk at EuroSciPy 2014
On Friday, November 7, 2014 10:08:16 AM UTC-5, Daniel Carrera wrote: Thanks for the link. Great talk indeed. I actually didn't know that you could type \alpha then the tab key and actually get the Greek character α. It also works in the REPL. It's great. (It also works in Emacs and vim, as well as some other editors with Julia modes. The most trivial feature to implement, and yet one of the most viscerally gratifying. See the tab-completion discussion in the manual: http://docs.julialang.org/en/latest/manual/interacting-with-julia/#tab-completion) Someone is welcome to post the video link on the Julia learning page; hopefully they will spell my name correctly. :-b
Re: [julia-users] Re: Can not require a precompiled package
Actually it is not what I want, but require function is used in the code of other packages. I noted this problem when I failed to load Rif package after I precompiled Gadfly package. The Rif package can not be loaded since it requires DataFrames package, which is alreally precompiled along with Gadfly package. So, if require function just do nothing about any precompiled package, everything will be fine. On Friday, November 7, 2014 4:33:22 PM UTC+1, Tim Holy wrote: Out of curiosity, why do you want to do this? Once you've got the module available, I would think you'd just refer to it by module name? --Tim On Friday, November 07, 2014 06:25:55 AM xiong...@gmail.com javascript: wrote: Can you require a pre-compiled package in your Julia? If yes, could you please tell me your version? Thanks! On Friday, November 7, 2014 3:10:15 PM UTC+1, xiong...@gmail.com wrote: After I precompiled a package in userimg.jl, require(Package_name) is always blocked without any response. But using and import the package works fine. That's weired. If I interrupt require-ing package by Ctrl-C, the breaking point always be: julia require(DataFrames) ^CERROR: interrupt in wait at ./task.jl:277 in wait at ./task.jl:194 in wait_full at ./multi.jl:602 in wait_ref at ./multi.jl:755 in wait_ref_3B_7574 at /home/MyDir/programs/julia/usr/bin/../lib/julia/sys.so in call_on_owner at ./multi.jl:749 in wait at ./multi.jl:756 in _require at ./loading.jl:62 in require at ./loading.jl:52 in require_3B_7273 at /home/MyDir/programs/julia/usr/bin/../lib/julia/sys.so FYI: julia versioninfo() Julia Version 0.4.0-dev+728 Commit f7172d3* (2014-09-22 12:08 UTC) Platform Info: System: Linux (x86_64-redhat-linux) CPU: Intel(R) Xeon(R) CPU E7- 4830 @ 2.13GHz WORD_SIZE: 64 BLAS: libopenblas (USE64BITINT NO_AFFINITY NEHALEM) LAPACK: libopenblas LIBM: libopenlibm LLVM: libLLVM-3.3
Re: [julia-users] Re: Can not require a precompiled package
https://github.com/lgautier/Rif.jl/issues/40 Seems relevant. kl. 16:54:10 UTC+1 fredag 7. november 2014 skrev xiong...@gmail.com følgende: Actually it is not what I want, but require function is used in the code of other packages. I noted this problem when I failed to load Rif package after I precompiled Gadfly package. The Rif package can not be loaded since it requires DataFrames package, which is alreally precompiled along with Gadfly package. So, if require function just do nothing about any precompiled package, everything will be fine. On Friday, November 7, 2014 4:33:22 PM UTC+1, Tim Holy wrote: Out of curiosity, why do you want to do this? Once you've got the module available, I would think you'd just refer to it by module name? --Tim On Friday, November 07, 2014 06:25:55 AM xiong...@gmail.com wrote: Can you require a pre-compiled package in your Julia? If yes, could you please tell me your version? Thanks! On Friday, November 7, 2014 3:10:15 PM UTC+1, xiong...@gmail.com wrote: After I precompiled a package in userimg.jl, require(Package_name) is always blocked without any response. But using and import the package works fine. That's weired. If I interrupt require-ing package by Ctrl-C, the breaking point always be: julia require(DataFrames) ^CERROR: interrupt in wait at ./task.jl:277 in wait at ./task.jl:194 in wait_full at ./multi.jl:602 in wait_ref at ./multi.jl:755 in wait_ref_3B_7574 at /home/MyDir/programs/julia/usr/bin/../lib/julia/sys.so in call_on_owner at ./multi.jl:749 in wait at ./multi.jl:756 in _require at ./loading.jl:62 in require at ./loading.jl:52 in require_3B_7273 at /home/MyDir/programs/julia/usr/bin/../lib/julia/sys.so FYI: julia versioninfo() Julia Version 0.4.0-dev+728 Commit f7172d3* (2014-09-22 12:08 UTC) Platform Info: System: Linux (x86_64-redhat-linux) CPU: Intel(R) Xeon(R) CPU E7- 4830 @ 2.13GHz WORD_SIZE: 64 BLAS: libopenblas (USE64BITINT NO_AFFINITY NEHALEM) LAPACK: libopenblas LIBM: libopenlibm LLVM: libLLVM-3.3
Re: [julia-users] Re: Can not require a precompiled package
Ah yes, sorry but I am the same person who posted this issue ^ ^b So far I have a dirty solution: add below code at the beginning of require function in load.jl and re-compile it: if ismatch(r^\w+$,name) isdefined(parse(name)) return nothing end Everything seems goes fine now... Hope it won't have any serious side-effect... I think as a Julia user, it is more valuable to make package-loading faster than make it always updated. The package loading time is a bottle-neck of improving user-experience right now. I quite support the precompile function. On Friday, November 7, 2014 5:34:27 PM UTC+1, Ivar Nesje wrote: https://github.com/lgautier/Rif.jl/issues/40 Seems relevant. kl. 16:54:10 UTC+1 fredag 7. november 2014 skrev xiong...@gmail.com følgende: Actually it is not what I want, but require function is used in the code of other packages. I noted this problem when I failed to load Rif package after I precompiled Gadfly package. The Rif package can not be loaded since it requires DataFrames package, which is alreally precompiled along with Gadfly package. So, if require function just do nothing about any precompiled package, everything will be fine. On Friday, November 7, 2014 4:33:22 PM UTC+1, Tim Holy wrote: Out of curiosity, why do you want to do this? Once you've got the module available, I would think you'd just refer to it by module name? --Tim On Friday, November 07, 2014 06:25:55 AM xiong...@gmail.com wrote: Can you require a pre-compiled package in your Julia? If yes, could you please tell me your version? Thanks! On Friday, November 7, 2014 3:10:15 PM UTC+1, xiong...@gmail.com wrote: After I precompiled a package in userimg.jl, require(Package_name) is always blocked without any response. But using and import the package works fine. That's weired. If I interrupt require-ing package by Ctrl-C, the breaking point always be: julia require(DataFrames) ^CERROR: interrupt in wait at ./task.jl:277 in wait at ./task.jl:194 in wait_full at ./multi.jl:602 in wait_ref at ./multi.jl:755 in wait_ref_3B_7574 at /home/MyDir/programs/julia/usr/bin/../lib/julia/sys.so in call_on_owner at ./multi.jl:749 in wait at ./multi.jl:756 in _require at ./loading.jl:62 in require at ./loading.jl:52 in require_3B_7273 at /home/MyDir/programs/julia/usr/bin/../lib/julia/sys.so FYI: julia versioninfo() Julia Version 0.4.0-dev+728 Commit f7172d3* (2014-09-22 12:08 UTC) Platform Info: System: Linux (x86_64-redhat-linux) CPU: Intel(R) Xeon(R) CPU E7- 4830 @ 2.13GHz WORD_SIZE: 64 BLAS: libopenblas (USE64BITINT NO_AFFINITY NEHALEM) LAPACK: libopenblas LIBM: libopenlibm LLVM: libLLVM-3.3
Re: [julia-users] Intel Xeon Phi support?
In the short term some options calculations, some other monte carlo calculations. They're all ridiculously parallel. i.e for a whole lot of client data what does a population of simulated clients look like having had the same trades, one by one. I'd have to do a whole lot of anonymisation to hand it out. At the moment I farm it out over some servers - I was wondering about ways to speed it up hence wondering about the xeon phi. The really difficult to get working looks depressing. Maybe I stick it on ebay and wait for Knight's Landing I see Stac are working with someone to have a Julia benchmark - that would be more authoritative. Thanks. Kind Regards, John. On Thursday, November 6, 2014 6:14:51 PM UTC, Viral Shah wrote: We had ordered a couple, but they are really difficult to get working. There is a fair bit of compiler work that is required to get it to work - so it is safe to assume that this is not coming anytime soon. However, the Knight's Landing should work out of the box with Julia whenever it comes and we will most likely have robust multi-threading support by then to leverage it. Out of curiosity, what would you like to run on the Xeon Phi? It may be a good multi-threading benchmark for us in general. -viral On Thursday, November 6, 2014 9:35:57 PM UTC+5:30, John Drummond wrote: Did you have any success? There's an offer of the cards for 200usd at the moment https://software.intel.com/en-us/articles/special-promotion-intel-xeon-phi-coprocessor-31s1p so I was going to pick one up Kind Regards, John. On Monday, May 12, 2014 4:45:32 PM UTC+1, Stefan Karpinski wrote: Not that I'm aware of, but we're going to take a crack at this over the summer, so there should be some progress here in the relatively near future. On Mon, May 12, 2014 at 9:46 AM, Nikolaos tsakos.w...@gmail.com wrote: Hi, Has anyone tried to configure and run julia on an intel xeon phi coprocessor? Any hints would be very helpful , how to run parallel on intel's phi cores. Thank you.
Re: [julia-users] Full blown GUI programming with Julia+JS
In light of what Patchwork can do, and staying future proof, I am more concerned about Web Components support, which IE seems to be still considering http://jonrimmer.github.io/are-we-componentized-yet/ More on web components here: http://css-tricks.com/modular-future-web-components/ On Fri, Nov 7, 2014 at 8:19 PM, Job van der Zwan j.l.vanderz...@gmail.com wrote: What's best is relative ;-) I personally haven't used IE in years, so I wouldn't know. Of course ;). For the record, neither have I (which would explain my outdated info, see below) On Thursday, 6 November 2014 20:23:46 UTC+1, Jameson wrote: Completely OT and [citation needed]. However, fwiw, IE didn't add SVG support until IE9 Sorry, sorry. I was just joking because I remember IE being the first to support hardware accelerated SVG and surprising everyone by beating the other browsers in this department [0]. My own tests at the time had similar results. But that was a lot of versions ago, if I run some more recent benchmarks[1][2], they're much closer. On Windows, that is -IIRC Firefox doesn't have hardware acceleration on Linux yet, for example. Anyway, the only real issue seems to be that SVG still still doesn't scale very well[3] (in terms of elements, not resolution of course), so as long as you don't have too many GUI elements it shouldn't matter much. [0] http://joeloughton.com/blog/web-applications/svg-vs-canvas-performance/ [1] http://jsperf.com/html-vs-svg-vs-canvas/26 (FF beats Chrome beats IE on my machine) [2] https://www.mapbox.com/osmdev/2012/11/20/getting-serious-about-svg/ - (check the unrounded/rounded performance links, Chrome beats IE beats FF on my machine) [3] http://frozeman.de/blog/2013/08/why-is-svg-so-slow/
[julia-users] defining function for lt for use in sort - simple question
Hi,
I suspect I'm doing something stupid but no idea what I'm missing.
I create a module .
I create a type in it, DayPriceText
I import Base.isless
I define isless for the type
now in the repl I get
methods(isless)
=
# 25 methods for generic function isless:
..
isless(x::DayPriceText,y::DayPriceText) at c:\works\juliaplay\LogParse.jl:16
but
julia typeof(a1p)
Array{DayPriceText,1}
julia sort(a1p, lt=CILogParse.isless)
ERROR: `isless` has no method matching isless(::DayPriceText,
::DayPriceText)
in sort! at sort.jl:246
julia sort(a1p)
ERROR: `isless` has no method matching isless(::DayPriceText,
::DayPriceText)
in sort! at sort.jl:246
I'm sure there's some obvious answer, but I've not idea what.
Thanks for any help
kind regards, John.
Re: [julia-users] Re: Can not require a precompiled package
In general I would think packages should be using `import` or `using` rather than `require`. That would fix your problem, I think. --Tim On Friday, November 07, 2014 09:32:33 AM xiongji...@gmail.com wrote: Ah yes, sorry but I am the same person who posted this issue ^ ^b So far I have a dirty solution: add below code at the beginning of require function in load.jl and re-compile it: if ismatch(r^\w+$,name) isdefined(parse(name)) return nothing end Everything seems goes fine now... Hope it won't have any serious side-effect... I think as a Julia user, it is more valuable to make package-loading faster than make it always updated. The package loading time is a bottle-neck of improving user-experience right now. I quite support the precompile function. On Friday, November 7, 2014 5:34:27 PM UTC+1, Ivar Nesje wrote: https://github.com/lgautier/Rif.jl/issues/40 Seems relevant. kl. 16:54:10 UTC+1 fredag 7. november 2014 skrev xiong...@gmail.com følgende: Actually it is not what I want, but require function is used in the code of other packages. I noted this problem when I failed to load Rif package after I precompiled Gadfly package. The Rif package can not be loaded since it requires DataFrames package, which is alreally precompiled along with Gadfly package. So, if require function just do nothing about any precompiled package, everything will be fine. On Friday, November 7, 2014 4:33:22 PM UTC+1, Tim Holy wrote: Out of curiosity, why do you want to do this? Once you've got the module available, I would think you'd just refer to it by module name? --Tim On Friday, November 07, 2014 06:25:55 AM xiong...@gmail.com wrote: Can you require a pre-compiled package in your Julia? If yes, could you please tell me your version? Thanks! On Friday, November 7, 2014 3:10:15 PM UTC+1, xiong...@gmail.com wrote: After I precompiled a package in userimg.jl, require(Package_name) is always blocked without any response. But using and import the package works fine. That's weired. If I interrupt require-ing package by Ctrl-C, the breaking point always be: julia require(DataFrames) ^CERROR: interrupt in wait at ./task.jl:277 in wait at ./task.jl:194 in wait_full at ./multi.jl:602 in wait_ref at ./multi.jl:755 in wait_ref_3B_7574 at /home/MyDir/programs/julia/usr/bin/../lib/julia/sys.so in call_on_owner at ./multi.jl:749 in wait at ./multi.jl:756 in _require at ./loading.jl:62 in require at ./loading.jl:52 in require_3B_7273 at /home/MyDir/programs/julia/usr/bin/../lib/julia/sys.so FYI: julia versioninfo() Julia Version 0.4.0-dev+728 Commit f7172d3* (2014-09-22 12:08 UTC) Platform Info: System: Linux (x86_64-redhat-linux) CPU: Intel(R) Xeon(R) CPU E7- 4830 @ 2.13GHz WORD_SIZE: 64 BLAS: libopenblas (USE64BITINT NO_AFFINITY NEHALEM) LAPACK: libopenblas LIBM: libopenlibm LLVM: libLLVM-3.3
[julia-users] Re: defining function for lt for use in sort - simple question
In this case it would be really great if you had a minimal reproducible
example. It looks to me as you are doing everything right, so I would start
looking for typos and scoping issues. It's hard to find them without
looking at the code.
Ideally the example should be small and possible to paste into a REPL
session, but if you can publish your code and don't want to extract only
the relevant part, that might be fine too.
Julia version and operating system is also nice to include, so that we have
it available in case we have problems reproducing your results.
Regards Ivar
kl. 20:14:48 UTC+1 fredag 7. november 2014 skrev John Drummond følgende:
Hi,
I suspect I'm doing something stupid but no idea what I'm missing.
I create a module .
I create a type in it, DayPriceText
I import Base.isless
I define isless for the type
now in the repl I get
methods(isless)
=
# 25 methods for generic function isless:
..
isless(x::DayPriceText,y::DayPriceText) at
c:\works\juliaplay\LogParse.jl:16
but
julia typeof(a1p)
Array{DayPriceText,1}
julia sort(a1p, lt=CILogParse.isless)
ERROR: `isless` has no method matching isless(::DayPriceText,
::DayPriceText)
in sort! at sort.jl:246
julia sort(a1p)
ERROR: `isless` has no method matching isless(::DayPriceText,
::DayPriceText)
in sort! at sort.jl:246
I'm sure there's some obvious answer, but I've not idea what.
Thanks for any help
kind regards, John.
[julia-users] Re: Gadfly: Type command before close browser in REPL
I got a solution: Just open a firefox in the background in advance before Gadfly drawing. The REPL will return to command-ready state soon after the figure is shown. On Tuesday, November 4, 2014 10:54:22 AM UTC+1, xiong...@gmail.com wrote: I like use Gadfly in REPL rather IJulia (because I can not Ctrl-C to break running script in IJulia). The browser (firefox) with figure pop-up through X11 on my screen. However, I cannot continue my command in REPL until I close the browser. Is there any way to return command-ready state immediately after the browser pop-up?
Re: [julia-users] Re: [ANN] Dierckx.jl: 1-d and 2-d splines as in scipy.interpolate
I'm new to Julia as of this week :-) I'm working through some old homework problems as a way to learn the language. I've gotten stuck on splines. I don't want the even-spacing limitation of Grid.jl (though the problem I'm working on *does* have even spacing!), and I can't figure out how to use BSplines.jl. ApproXD.jl and Dierckx.jl don't show up in the package list in Julia Studio, nor does the Splines.jl package mentioned in this thread, so I don't know how to install them. I like what I can see of BSplines.jl, but there is essentially zero documentation. From the newbie perspective, giving documentation (a few examples) would seem the easiest solution. Can someone help me on this? In my particular case, I end up with 2 vectors: lRe=[0.0,1.0,2.0,3.0,4.0,5.0] # log10 of Reynolds numbers Cd=[0.04,0.28,0.73,0.74,0.64,0.61] # corresponding coeff of discharge Other parts of the code work out successively changing Reynolds number; then I need to interpolate to get a coefficient of discharge. Shouldn't be difficult, but a few hours with BSplines.jl didn't get me there :-( Any suggestions? many thanks, Toby On Wednesday, October 29, 2014 9:50:29 AM UTC-5, Peter Simon wrote: Also, check out ApproXD.jl https://github.com/floswald/ApproXD.jl which is designed for efficient high dimensional interpolation. --Peter On Wednesday, October 29, 2014 5:32:07 AM UTC-7, Tim Holy wrote: Grid should be able to do this. Best is to try it and see how it works out. --Tim On Wednesday, October 29, 2014 04:03:19 AM Nils Gudat wrote: Since we seem to have a lot of experts on interpolation in Julia in this thread, can I just ask a general question: I'm trying to interpolate values of a function for which I only know the values at some gridpoints in six dimensions. What would be the best way to do this given that I need the interpolation to be fast, as I have to interpolate millions of times? I realize that this is a fairly general question, but I'd appreciate any pointers as to what the interpolation capabilities of Julia are! Thanks, Nils
[julia-users] running multiple commands
Hi, just wondering why I cannot chain these kind of multiple commands in julia. Example: the command run(`mkdir $tmp touch $file`) creates the directories $tmp, touch and $file, while I only want the second part after to run if first command is successful. Similarly if I use the ; to create a sequence of commands, e.g. run(`mkdir $tmp; touch $file`). I could run multiple commands separately, and do the checks in julia, but there might be an easier way to achieve that. Davide
[julia-users] atan2 ?
Hi The documentation for atan2 says: atan2(*y*, *x*) Compute the inverse tangent of y/x, using the signs of both x and y to determine the quadrant of the return value. Ok, so far so good: atan2(0, 1) = 0 and atan2(1, 0) = pi/2. It works, However, listing the methods of atan2 shows methods(atan2) # 9 methods for generic function atan2: atan2(x::Float64,y::Float64) at math.jl:173 atan2(x::Float32,y::Float32) at math.jl:174 atan2(a::Float16,b::Float16) at float16.jl:144 Is this just an error in the naming of the input arguments? Davide
[julia-users] Re: atan2 ?
If you are referring to the a and b in the Float16 method, that is an inconsistency, not a error. We highly value contributions and we usually try to help users discovering such small issues to submit a pull request for the change, rather than just fixing it ourself (even though it is faster for us the first time). We need lots of eyes on the system to discover small and big issues, and being a contributor makes lots of people motivated. For changes like this (changing variable names), you don't even need to learn git, but can just edit /base/float16.jl https://github.com/JuliaLang/julia/blob/master/base/float16.jl#L144 in the github web UI, and it will automatically create a fork and a Pull Request, Regards Ivar kl. 21:08:01 UTC+1 fredag 7. november 2014 skrev Davide Lasagna følgende: Hi The documentation for atan2 says: atan2(*y*, *x*) Compute the inverse tangent of y/x, using the signs of both x and y to determine the quadrant of the return value. Ok, so far so good: atan2(0, 1) = 0 and atan2(1, 0) = pi/2. It works, However, listing the methods of atan2 shows methods(atan2) # 9 methods for generic function atan2: atan2(x::Float64,y::Float64) at math.jl:173 atan2(x::Float32,y::Float32) at math.jl:174 atan2(a::Float16,b::Float16) at float16.jl:144 Is this just an error in the naming of the input arguments? Davide
[julia-users] Re: atan2 ?
On Friday, November 7, 2014 2:53:28 PM UTC-6, Ivar Nesje wrote: If you are referring to the a and b in the Float16 method, that is an inconsistency, not a error. And you can do the same thing to swap x and y in the definitions in math.jl.
[julia-users] Re: atan2 ?
kl. 22:01:23 UTC+1 fredag 7. november 2014 skrev Patrick O'Leary følgende: On Friday, November 7, 2014 2:53:28 PM UTC-6, Ivar Nesje wrote: If you are referring to the a and b in the Float16 method, that is an inconsistency, not a error. And you can do the same thing to swap x and y in the definitions in math.jl. How could I not see that. That's definitely a more important issue, but it seems like the documentation is correct about the argument order. Swapping them in the libm wrapper would fix that.
Re: [julia-users] Re: [ANN] Dierckx.jl: 1-d and 2-d splines as in scipy.interpolate
I believe both ApproXD.jl and Dierckx.jl need Julia 0.3, while Julia Studio is still stuck on 0.2. That is why you can't install them. Until Julia Studio gets updated to 0.3 you might be better off using something like IJulia or Juno. On Friday, November 7, 2014 7:48:41 PM UTC+2, ewing...@gmail.com wrote: I'm new to Julia as of this week :-) I'm working through some old homework problems as a way to learn the language. I've gotten stuck on splines. I don't want the even-spacing limitation of Grid.jl (though the problem I'm working on *does* have even spacing!), and I can't figure out how to use BSplines.jl. ApproXD.jl and Dierckx.jl don't show up in the package list in Julia Studio, nor does the Splines.jl package mentioned in this thread, so I don't know how to install them. I like what I can see of BSplines.jl, but there is essentially zero documentation. From the newbie perspective, giving documentation (a few examples) would seem the easiest solution. Can someone help me on this? In my particular case, I end up with 2 vectors: lRe=[0.0,1.0,2.0,3.0,4.0,5.0] # log10 of Reynolds numbers Cd=[0.04,0.28,0.73,0.74,0.64,0.61] # corresponding coeff of discharge Other parts of the code work out successively changing Reynolds number; then I need to interpolate to get a coefficient of discharge. Shouldn't be difficult, but a few hours with BSplines.jl didn't get me there :-( Any suggestions? many thanks, Toby On Wednesday, October 29, 2014 9:50:29 AM UTC-5, Peter Simon wrote: Also, check out ApproXD.jl https://github.com/floswald/ApproXD.jl which is designed for efficient high dimensional interpolation. --Peter On Wednesday, October 29, 2014 5:32:07 AM UTC-7, Tim Holy wrote: Grid should be able to do this. Best is to try it and see how it works out. --Tim On Wednesday, October 29, 2014 04:03:19 AM Nils Gudat wrote: Since we seem to have a lot of experts on interpolation in Julia in this thread, can I just ask a general question: I'm trying to interpolate values of a function for which I only know the values at some gridpoints in six dimensions. What would be the best way to do this given that I need the interpolation to be fast, as I have to interpolate millions of times? I realize that this is a fairly general question, but I'd appreciate any pointers as to what the interpolation capabilities of Julia are! Thanks, Nils
[julia-users] Re: atan2 ?
Matlab and Fortran both use the convention atan2(x,y) to mean the polar angle of the Cartesian point (x,y). Excel uses the convention atan2(y,x). I think it would be better for Julia to be consistent with Matlab and Fortran, rather than Excel. My 2cents, --Peter On Friday, November 7, 2014 1:11:35 PM UTC-8, Ivar Nesje wrote: kl. 22:01:23 UTC+1 fredag 7. november 2014 skrev Patrick O'Leary følgende: On Friday, November 7, 2014 2:53:28 PM UTC-6, Ivar Nesje wrote: If you are referring to the a and b in the Float16 method, that is an inconsistency, not a error. And you can do the same thing to swap x and y in the definitions in math.jl. How could I not see that. That's definitely a more important issue, but it seems like the documentation is correct about the argument order. Swapping them in the libm wrapper would fix that.
[julia-users] Re: atan2 ?
You're absolutely right! Shouldn't rely on memory for this. As usual, Julia gets it right, as I should have known. --Peter On Friday, November 7, 2014 3:12:01 PM UTC-8, Alex wrote: Hi Peter, Seems you mixed this up, Excel is the one using atan2(x,y) while the others use atan2(y,x) [1]. Best, Alex. [1] http://en.m.wikipedia.org/wiki/Atan2 On Friday, 7 November 2014 22:50:30 UTC+1, Peter Simon wrote: Matlab and Fortran both use the convention atan2(x,y) to mean the polar angle of the Cartesian point (x,y). Excel uses the convention atan2(y,x). I think it would be better for Julia to be consistent with Matlab and Fortran, rather than Excel. My 2cents, --Peter On Friday, November 7, 2014 1:11:35 PM UTC-8, Ivar Nesje wrote: kl. 22:01:23 UTC+1 fredag 7. november 2014 skrev Patrick O'Leary følgende: On Friday, November 7, 2014 2:53:28 PM UTC-6, Ivar Nesje wrote: If you are referring to the a and b in the Float16 method, that is an inconsistency, not a error. And you can do the same thing to swap x and y in the definitions in math.jl. How could I not see that. That's definitely a more important issue, but it seems like the documentation is correct about the argument order. Swapping them in the libm wrapper would fix that.
[julia-users] Re: atan2 ?
Hi Peter, Seems you mixed this up, Excel is the one using atan2(x,y) while the others use atan2(y,x) [1]. Best, Alex. [1] http://en.m.wikipedia.org/wiki/Atan2 On Friday, 7 November 2014 22:50:30 UTC+1, Peter Simon wrote: Matlab and Fortran both use the convention atan2(x,y) to mean the polar angle of the Cartesian point (x,y). Excel uses the convention atan2(y,x). I think it would be better for Julia to be consistent with Matlab and Fortran, rather than Excel. My 2cents, --Peter On Friday, November 7, 2014 1:11:35 PM UTC-8, Ivar Nesje wrote: kl. 22:01:23 UTC+1 fredag 7. november 2014 skrev Patrick O'Leary følgende: On Friday, November 7, 2014 2:53:28 PM UTC-6, Ivar Nesje wrote: If you are referring to the a and b in the Float16 method, that is an inconsistency, not a error. And you can do the same thing to swap x and y in the definitions in math.jl. How could I not see that. That's definitely a more important issue, but it seems like the documentation is correct about the argument order. Swapping them in the libm wrapper would fix that.
[julia-users] Re: Installation commands for Julia/IPython Notbook/Matplotlib on OS X
On Thursday, November 6, 2014 1:32:36 PM UTC-5, Ethan Anderes wrote: As an addendum to what Steven said, I have found that after installing Anaconda I need to run the following command to get PyPlot to work from the REPL: I just changed the default backend in PyPlot (if a supported one is not specified in matplotlib.rcParams['backend']) to Tk, now that PyCall supports Tk (tkinter) event loops. Hopefully this should ease installation on MacOS because you won't need to worry about getting a working Qt.
Re: [julia-users] Intel Xeon Phi support?
On Thursday, November 6, 2014 1:14:51 PM UTC-5, Viral Shah wrote: We had ordered a couple, but they are really difficult to get working. There is a fair bit of compiler work that is required to get it to work - so it is safe to assume that this is not coming anytime soon. However, the Knight's Landing should work out of the box with Julia whenever it comes and we will most likely have robust multi-threading support by then to leverage it. Aww! Out of curiosity, what would you like to run on the Xeon Phi? It may be a good multi-threading benchmark for us in general. Something that requires 1TFlop, or maybe 1000 things that take 1 GFlop? Hmm, how about realtime photogrammetry? -viral On Thursday, November 6, 2014 9:35:57 PM UTC+5:30, John Drummond wrote: Did you have any success? There's an offer of the cards for 200usd at the moment That's like 1/10th the price?
