[julia-users] Re: Realtime Audio Processing with PortAudio.jl

[Daniel Casimiro]

I use callback functions with CoreAudio to play WAV files on Mac OS X. My 
implementation in WAV.jl is not sophisticated, but it works reasonably well. 

[julia-users] Re: Problem removing a package

[Daniel Casimiro]

FWIW, I don't think that this is specific to WAV.jl. It only contains julia 
source files. Additionally, it only depends on a single package: Compat.jl. 

Re: [julia-users] The sub function behaves differently in v0.3 and master

[Daniel Casimiro]

FWIW, I came up with the following snippet to get the behavior that I want:

const nchans = size(userData.samples, 2)
const samples = sub(userData.samples, tuple(rng, ntuple(nchans - 1, _
-:)...))

It appears to work.

On Sunday, February 1, 2015 at 8:38:09 PM UTC-5, Tim Holy wrote:

 SubArrays have been entirely rewritten in 0.4, and can do quite a few 
 tricks 
 that the old ones can't. Changing the dimensionality of the view compared 
 to 
 the parent, as in your example, is one of them. Here's another example of 
 something you simply can't do on 0.3: 

 julia A = reshape(1:15, 3, 5) 
 3x5 Array{Int64,2}: 
  1  4  7  10  13 
  2  5  8  11  14 
  3  6  9  12  15 

 julia b = sub(A, [2, 7, 8]) 
 3-element SubArray{Int64,1,Array{Int64,2},(Array{Int64,1},),0}: 
  2 
  7 
  8 

 julia b[2] = -1 
 -1 

 julia A 
 3x5 Array{Int64,2}: 
  1  4  -1  10  13 
  2  5   8  11  14 
  3  6   9  12  15 

 If anything, the divergence between the two will grow further once 
 https://github.com/JuliaLang/julia/issues/9874 is addressed. 

 Best, 
 --Tim 

 On Sunday, February 01, 2015 12:02:56 PM Daniel Casimiro wrote: 
  Hi, 
  
  I noticed that the sub function behaves differently in master and 
 version 
  0.3.5, when handling data of type Array{Float64, 1}. I am not sure if 
 the 
  change is intentional. 
  
  The following works as expected on Julia master: 
  
  *julia* *sub([1.0; 2; 3; 4], 1:3, :)* 
  
  but, fails in version 0.3.5 with the following error: 
   *ERROR: `sub` has no method matching sub(::Array{Float64,1}, 
   
   ::(UnitRange{Int64},UnitRange{Int64}))* 
   
   * in sub at subarray.jl:80** in sub at subarray.jl:132* 
  
  Is this a bug in Julia 0.3.5 or master? 
  
  This came up in this pull request: 
  https://github.com/dancasimiro/WAV.jl/pull/20. I just figured out that 
 my 
  fix is broken too. 
  
  Thanks. 

Re: [julia-users] The sub function behaves differently in v0.3 and master

[Daniel Casimiro]

A subtle difference for Julia v0.3:

const nchans = size(userData.samples, 2)
const samples = sub(userData.samples, tuple(rng, ntuple(nchans - 1, _
-:)...)...)

because (I think) of https://github.com/JuliaLang/julia/issues/4869

On Saturday, February 7, 2015 at 1:44:28 PM UTC-5, Daniel Casimiro wrote:

 FWIW, I came up with the following snippet to get the behavior that I want:

 const nchans = size(userData.samples, 2)
 const samples = sub(userData.samples, tuple(rng, ntuple(nchans - 1, _
 -:)...))

 It appears to work.

 On Sunday, February 1, 2015 at 8:38:09 PM UTC-5, Tim Holy wrote:

 SubArrays have been entirely rewritten in 0.4, and can do quite a few 
 tricks 
 that the old ones can't. Changing the dimensionality of the view compared 
 to 
 the parent, as in your example, is one of them. Here's another example of 
 something you simply can't do on 0.3: 

 julia A = reshape(1:15, 3, 5) 
 3x5 Array{Int64,2}: 
  1  4  7  10  13 
  2  5  8  11  14 
  3  6  9  12  15 

 julia b = sub(A, [2, 7, 8]) 
 3-element SubArray{Int64,1,Array{Int64,2},(Array{Int64,1},),0}: 
  2 
  7 
  8 

 julia b[2] = -1 
 -1 

 julia A 
 3x5 Array{Int64,2}: 
  1  4  -1  10  13 
  2  5   8  11  14 
  3  6   9  12  15 

 If anything, the divergence between the two will grow further once 
 https://github.com/JuliaLang/julia/issues/9874 is addressed. 

 Best, 
 --Tim 

 On Sunday, February 01, 2015 12:02:56 PM Daniel Casimiro wrote: 
  Hi, 
  
  I noticed that the sub function behaves differently in master and 
 version 
  0.3.5, when handling data of type Array{Float64, 1}. I am not sure if 
 the 
  change is intentional. 
  
  The following works as expected on Julia master: 
  
  *julia* *sub([1.0; 2; 3; 4], 1:3, :)* 
  
  but, fails in version 0.3.5 with the following error: 
   *ERROR: `sub` has no method matching sub(::Array{Float64,1}, 
   
   ::(UnitRange{Int64},UnitRange{Int64}))* 
   
   * in sub at subarray.jl:80** in sub at subarray.jl:132* 
  
  Is this a bug in Julia 0.3.5 or master? 
  
  This came up in this pull request: 
  https://github.com/dancasimiro/WAV.jl/pull/20. I just figured out that 
 my 
  fix is broken too. 
  
  Thanks. 

[julia-users] The sub function behaves differently in v0.3 and master

[Daniel Casimiro]

Hi,

I noticed that the sub function behaves differently in master and version 
0.3.5, when handling data of type Array{Float64, 1}. I am not sure if the 
change is intentional.

The following works as expected on Julia master:

*julia* *sub([1.0; 2; 3; 4], 1:3, :)*

but, fails in version 0.3.5 with the following error:


 *ERROR: `sub` has no method matching sub(::Array{Float64,1}, 
 ::(UnitRange{Int64},UnitRange{Int64}))*
 * in sub at subarray.jl:80** in sub at subarray.jl:132*


Is this a bug in Julia 0.3.5 or master?

This came up in this pull request: 
https://github.com/dancasimiro/WAV.jl/pull/20. I just figured out that my 
fix is broken too. 

Thanks.