# Specific Domains

**URL:** https://discourse.julialang.org/c/domain/10.md?no_subcategories=false&page=414

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**Page:** 415

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## [BARON ERROR: can't open nl file](https://discourse.julialang.org/t/baron-error-cant-open-nl-file/48456)

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**Author:** [@tpmp](https://discourse.julialang.org/u/tpmp)\
**Replies:** 1\
**Last updated:** [October 18, 2020, 8:40pm UTC](https://discourse.julialang.org/t/baron-error-cant-open-nl-file/48456 "2020-10-18T20:40:49Z")

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I was trying to use BARON to solve some problems. JuMP.jl version: 0.21.5 BARON.jl version: 0.6.5 When I run my program, the following error occurs: C:\\Program Files\\ampl\_mswin64\\baron.exe: can't open C:\\Users\\Lujia\\…

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## [Most Accurate/Efficient Interpolation approach for 1D/2D, discrete-continuous hybrid problem](https://discourse.julialang.org/t/most-accurate-efficient-interpolation-approach-for-1d-2d-discrete-continuous-hybrid-problem/48515)

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**Author:** [@CosmoProf](https://discourse.julialang.org/u/CosmoProf)\
**Replies:** 4\
**Last updated:** [October 18, 2020, 7:14pm UTC](https://discourse.julialang.org/t/most-accurate-efficient-interpolation-approach-for-1d-2d-discrete-continuous-hybrid-problem/48515 "2020-10-18T19:14:13Z")

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Hi all, looking for advice on the best way to get very accurate results in finite computing time, for this problem: A discrete grid in x, with f(x) values at each point. For any initial choice of x0, need to interpolate…

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## [Getting "MethodError: no method matching Model()" when initializing models on JuMP](https://discourse.julialang.org/t/getting-methoderror-no-method-matching-model-when-initializing-models-on-jump/43647)

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**Author:** [@hassanis](https://discourse.julialang.org/u/hassanis)\
**Replies:** 6\
**Last updated:** [October 18, 2020, 6:43pm UTC](https://discourse.julialang.org/t/getting-methoderror-no-method-matching-model-when-initializing-models-on-jump/43647 "2020-10-18T18:43:38Z")

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I’m using JuMP and had several models that were running fine. Now, whenever I try to initialize a model (for example Model(Gurobi.Optimizer)), I get the error: MethodError: no method matching Model(::Type{Gurobi.Optimiz…

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## [Quaternion-, and up to, sedenion-valued neural networks: Parallelizing Hamilton product on GPUs/CUDA](https://discourse.julialang.org/t/quaternion-and-up-to-sedenion-valued-neural-networks-parallelizing-hamilton-product-on-gpus-cuda/48442)

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**Author:** [@Palli](https://discourse.julialang.org/u/Palli)\
**Replies:** 7\
**Last updated:** [October 17, 2020, 11:34pm UTC](https://discourse.julialang.org/t/quaternion-and-up-to-sedenion-valued-neural-networks-parallelizing-hamilton-product-on-gpus-cuda/48442 "2020-10-17T23:34:29Z")

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\[Edit: See my next comment on August 2020 Sedenion-networks, and there and here a bit on Octonion-networks. I changed the title yet again replacing Octonion with Sedenion as to not make it too long.\] The specific fou…

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## [GSSAPI / Kerberos in Julia?](https://discourse.julialang.org/t/gssapi-kerberos-in-julia/48548)

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**Author:** [@tp2750](https://discourse.julialang.org/u/tp2750)\
**Replies:** 0\
**Last updated:** [October 17, 2020, 4:21pm UTC](https://discourse.julialang.org/t/gssapi-kerberos-in-julia/48548 "2020-10-17T16:21:39Z")

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Are there any GSSAPI packages in Julia? I need to interact with a webservice that authenticates using Kerberos to an Active Directory Domain Controller. Something similar to what Curl does when called with these argume…

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## [Tweak axes labels of a 3d plot](https://discourse.julialang.org/t/tweak-axes-labels-of-a-3d-plot/48116)

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**Author:** [@Gregstrq](https://discourse.julialang.org/u/Gregstrq)\
**Replies:** 12\
**Last updated:** [October 17, 2020, 6:45am UTC](https://discourse.julialang.org/t/tweak-axes-labels-of-a-3d-plot/48116 "2020-10-17T06:45:20Z")

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I notice that when I make a 3d plot using Plots, the x and y axes labels are tilted so that they are parallel to the axes. I would like to make them horizontal. What attributes in Plots.jl control the tilting of the axe…

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## [Jump Solving stops jumping weirdly, something recognizable?](https://discourse.julialang.org/t/jump-solving-stops-jumping-weirdly-something-recognizable/48525)

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**Author:** [@Torkel](https://discourse.julialang.org/u/Torkel)\
**Replies:** 0\
**Last updated:** [October 16, 2020, 10:37pm UTC](https://discourse.julialang.org/t/jump-solving-stops-jumping-weirdly-something-recognizable/48525 "2020-10-16T22:37:58Z")

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I simulated a JumpProblem, and I simulate it many times (100) using the ensemble functionality. Very rarely (like 1 time out of 100) the solution suddenly stops changing, see this plot of example: (the green line) Th…

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## [A newbie can not use CUDA by follow official DOC!](https://discourse.julialang.org/t/a-newbie-can-not-use-cuda-by-follow-official-doc/36010)

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**Author:** [@nuclear718](https://discourse.julialang.org/u/nuclear718)\
**Replies:** 33\
**Last updated:** [October 16, 2020, 3:52pm UTC](https://discourse.julialang.org/t/a-newbie-can-not-use-cuda-by-follow-official-doc/36010 "2020-10-16T15:52:13Z")

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New PC, New Julia, New CUDA package and just totally follow ““https://juliagpu.gitlab.io/CUDA.jl/”” but it doesn’t work! using CUDAdrv, CUDAnative, CuArrays get a error: ┌ Info: CUDAnative.jl failed to initialize, GPU…

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## [NLsolve Intermediate Value Theorem](https://discourse.julialang.org/t/nlsolve-intermediate-value-theorem/48509)

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**Author:** [@brett\_knoss](https://discourse.julialang.org/u/brett_knoss)\
**Replies:** 1\
**Last updated:** [October 16, 2020, 6:58pm UTC](https://discourse.julialang.org/t/nlsolve-intermediate-value-theorem/48509 "2020-10-16T18:58:33Z")

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Does NLsolve use the Intermediate Value Theorem, how do I aproxemetly solve a problem like 1000=(x)^2+10sin(x) I know that f(a)=f(0)=0 and that f(b) can be f(100)=(100)^2+10sin(100)\>=9990 how would I find x such that…

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## [How to get html\_select values in Dash.jl](https://discourse.julialang.org/t/how-to-get-html-select-values-in-dash-jl/48506)

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**Author:** [@Iulian.Cioarca](https://discourse.julialang.org/u/Iulian.Cioarca)\
**Replies:** 0\
**Last updated:** [October 16, 2020, 6:08pm UTC](https://discourse.julialang.org/t/how-to-get-html-select-values-in-dash-jl/48506 "2020-10-16T18:08:31Z")

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I gave Dash.jl a try and it looks really nice! I have, however, a question: Suppose I have the following code: using Dash, DashHtmlComponents, DashCoreComponents app = dash() app.layout = html\_div() do htm…

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## [Compiling kernel resulted in invalid LLVM IR Reason: unsupported dynamic function invocation](https://discourse.julialang.org/t/compiling-kernel-resulted-in-invalid-llvm-ir-reason-unsupported-dynamic-function-invocation/48452)

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**Author:** [@FelixBenning](https://discourse.julialang.org/u/FelixBenning)\
**Replies:** 11\
**Last updated:** [October 16, 2020, 2:58pm UTC](https://discourse.julialang.org/t/compiling-kernel-resulted-in-invalid-llvm-ir-reason-unsupported-dynamic-function-invocation/48452 "2020-10-16T14:58:03Z")

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So I am trying to write an extreme value/ order statistics package for GPUs. The idea is, that getting the maximum of a large number of random variables multiple times in order to get a max distribution should lend itsel…

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## [Annoying JuMP way to deal with shadow prices](https://discourse.julialang.org/t/annoying-jump-way-to-deal-with-shadow-prices/48420)

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**Author:** [@jovansam](https://discourse.julialang.org/u/jovansam)\
**Replies:** 2\
**Last updated:** [October 16, 2020, 10:44am UTC](https://discourse.julialang.org/t/annoying-jump-way-to-deal-with-shadow-prices/48420 "2020-10-16T10:44:10Z")

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JuMP has annoying shadow price behavior. First raised here, the issue also matters in the presence of non-linear models/constraints in JuMP. The behavior is not there in GAMS. My model is an economic growth model. Took …

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## [Assistance with Transformers.jl](https://discourse.julialang.org/t/assistance-with-transformers-jl/48483)

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**Author:** [@Stantin\_Siebritz](https://discourse.julialang.org/u/Stantin_Siebritz)\
**Replies:** 0\
**Last updated:** [October 16, 2020, 9:43am UTC](https://discourse.julialang.org/t/assistance-with-transformers-jl/48483 "2020-10-16T09:43:33Z")

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Hi I would like to create an implementation of the Transformer NLP architecture, more specifically I am trying to implement a BERT Summarizer. I have been using the Transformer.jl (v 0.1.7) package and have followed the…

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## [Define a distribution from a given distribution](https://discourse.julialang.org/t/define-a-distribution-from-a-given-distribution/48220)

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**Author:** [@mcql](https://discourse.julialang.org/u/mcql)\
**Replies:** 12\
**Last updated:** [October 16, 2020, 8:55am UTC](https://discourse.julialang.org/t/define-a-distribution-from-a-given-distribution/48220 "2020-10-16T08:55:23Z")

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Hello, I would like to define two distributions: p = Uniform(0,1) p2 = 1-p give me typrerror. ERROR: MethodError: no method matching -(::Int64, ::Uniform{Float64}) I also cannot sum two distributions: c = Normal(…

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## [Makie Text Box/File Selection GUI](https://discourse.julialang.org/t/makie-text-box-file-selection-gui/48472)

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**Author:** [@Allan\_Baker](https://discourse.julialang.org/u/Allan_Baker)\
**Replies:** 2\
**Last updated:** [October 16, 2020, 8:21am UTC](https://discourse.julialang.org/t/makie-text-box-file-selection-gui/48472 "2020-10-16T08:21:07Z")

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I have a Makie plot with interactive slider bars. Wondering what’s the best way to advance the components that can be added to this graphic. How do I make a Dial for example instead of a linear slide? But that’s not e…

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## [Reading individual slices of a TIFF stack (aka multipage TIFF)](https://discourse.julialang.org/t/reading-individual-slices-of-a-tiff-stack-aka-multipage-tiff/12772)

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**Author:** [@tross](https://discourse.julialang.org/u/tross)\
**Replies:** 8\
**Last updated:** [October 16, 2020, 2:50am UTC](https://discourse.julialang.org/t/reading-individual-slices-of-a-tiff-stack-aka-multipage-tiff/12772 "2020-10-16T02:50:14Z")

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Hello, I am having trouble finding a way to access individual slices of a TIFF stack. I have a bunch of large TIFF stacks that are all too big to load into memory. In Matlab you can load a specific index of a TIFF stack…

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## [Problem with CPLEX variable types using JuMP](https://discourse.julialang.org/t/problem-with-cplex-variable-types-using-jump/48415)

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**Author:** [@arkanver](https://discourse.julialang.org/u/arkanver)\
**Replies:** 5\
**Last updated:** [October 15, 2020, 9:02pm UTC](https://discourse.julialang.org/t/problem-with-cplex-variable-types-using-jump/48415 "2020-10-15T21:02:30Z")

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Hello all, I am trying to solve a quadratic optimization problem using CPLEX through JuMP. It is a continuous relaxation, hence all of my variables are continuous (with box constraints). After dealing with convexity is…

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## [SCIP is giving me solution, but CPLEX v12.9 is not](https://discourse.julialang.org/t/scip-is-giving-me-solution-but-cplex-v12-9-is-not/48216)

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**Author:** [@sogrbilja](https://discourse.julialang.org/u/sogrbilja)\
**Replies:** 8\
**Last updated:** [October 15, 2020, 9:05pm UTC](https://discourse.julialang.org/t/scip-is-giving-me-solution-but-cplex-v12-9-is-not/48216 "2020-10-15T21:05:37Z")

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I understand now that you will say that you can’t help me without providing the whole code to test, but can you at least point me is there anything that I can check for ie: some logging mechanism, debug, the default sett…

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## [Efficiently extracting rows from VectorAffineFunction structs in MOI](https://discourse.julialang.org/t/efficiently-extracting-rows-from-vectoraffinefunction-structs-in-moi/48408)

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**Author:** [@asa](https://discourse.julialang.org/u/asa)\
**Replies:** 3\
**Last updated:** [October 15, 2020, 8:59pm UTC](https://discourse.julialang.org/t/efficiently-extracting-rows-from-vectoraffinefunction-structs-in-moi/48408 "2020-10-15T20:59:33Z")

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The MOI.VectorAffineFunction type is used to define linear vector valued functions in MathOptInterface. I am trying to extract a row of such an object itself with type VectorAffineFunction, for example with f = MOI.Vect…

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## [Performance of time series packages](https://discourse.julialang.org/t/performance-of-time-series-packages/48447)

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**Author:** [@Yifan\_Liu](https://discourse.julialang.org/u/Yifan_Liu)\
**Replies:** 5\
**Last updated:** [October 15, 2020, 5:25pm UTC](https://discourse.julialang.org/t/performance-of-time-series-packages/48447 "2020-10-15T17:25:38Z")

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Are there performance benchmark of ARCHModels.jl vs. rugarch & rmgarch? rugarch is pretty slow, and I kind of remember a while ago someone mentioned ARCHModels has a performance issue.

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## [How can we create a leaner ecosystem for Julia?](https://discourse.julialang.org/t/how-can-we-create-a-leaner-ecosystem-for-julia/32904)

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**Author:** [@Albert\_Zevelev](https://discourse.julialang.org/u/Albert_Zevelev)\
**Replies:** 100\
**Last updated:** [October 15, 2020, 5:27pm UTC](https://discourse.julialang.org/t/how-can-we-create-a-leaner-ecosystem-for-julia/32904 "2020-10-15T17:27:17Z")

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Comparisons of Julia w/ other languages often say one disadvantage of Julia is that it has fewer 3rd party packages. I tend to disagree. Julia doesn’t need more packages, it needs better packages (w/ more functionality)…

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## [ODE-LSTM implementation](https://discourse.julialang.org/t/ode-lstm-implementation/48437)

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**Author:** [@lungd](https://discourse.julialang.org/u/lungd)\
**Replies:** 1\
**Last updated:** [October 15, 2020, 4:26pm UTC](https://discourse.julialang.org/t/ode-lstm-implementation/48437 "2020-10-15T16:26:42Z")

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I am working on implementing the ODELSTM cell https://github.com/SciML/DiffEqFlux.jl/issues/422 The cell expects hidden states and a tuple of a feature vector and the elapsed time between the observations (or a 2D featu…

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## [Reading tfrecord files](https://discourse.julialang.org/t/reading-tfrecord-files/26316)

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**Author:** [@jbrea](https://discourse.julialang.org/u/jbrea)\
**Replies:** 1\
**Last updated:** [October 15, 2020, 3:57pm UTC](https://discourse.julialang.org/t/reading-tfrecord-files/26316 "2020-10-15T15:57:43Z")

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I want to play a bit with the Youtube 8M dataset. Did somebody already work on reading tfrecord files? I tried julia\> using TensorFlow julia\> it = TensorFlow.io.TFRecord.RecordIterator("train0111.tfrecord") julia\> firs…

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## [Result\_dual vs getdual. signs are the opposite](https://discourse.julialang.org/t/result-dual-vs-getdual-signs-are-the-opposite/16355)

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**Author:** [@chkwon](https://discourse.julialang.org/u/chkwon)\
**Replies:** 12\
**Last updated:** [October 15, 2020, 1:48pm UTC](https://discourse.julialang.org/t/result-dual-vs-getdual-signs-are-the-opposite/16355 "2020-10-15T13:48:46Z")

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JuMP v0.19: using JuMP, Clp m = Model(with\_optimizer(Clp.Optimizer)) @variable(m, y\>=0) @objective(m, Max, y) @constraint(m, con, y \<= 3) JuMP.optimize!(m) pi\_val = JuMP.result\_dual(con) @show pi\_val I obtained pi\_val …

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## [Image Super Resolution](https://discourse.julialang.org/t/image-super-resolution/48282)

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**Author:** [@kungfooman](https://discourse.julialang.org/u/kungfooman)\
**Replies:** 3\
**Last updated:** [October 15, 2020, 11:32am UTC](https://discourse.julialang.org/t/image-super-resolution/48282 "2020-10-15T11:32:15Z")

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Hi, is there any Julia project focusing on Image Super Resolution? There are lots of these libraries for e.g. Python or Mathematica, but found not one for Julia:

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## [BinaryHeap Error in DifferentialEquations](https://discourse.julialang.org/t/binaryheap-error-in-differentialequations/48308)

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**Author:** [@khannay](https://discourse.julialang.org/u/khannay)\
**Replies:** 19\
**Last updated:** [October 14, 2020, 9:33pm UTC](https://discourse.julialang.org/t/binaryheap-error-in-differentialequations/48308 "2020-10-14T21:33:31Z")

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Hello, I am having a lot of problems trying to resolve an issue with DifferentialEquations.jl in a package I am developing. For the example code from the docs using DifferentialEquations, Plots function lorenz!(du,u,…

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## [How to declare a binary variable in a robust model?](https://discourse.julialang.org/t/how-to-declare-a-binary-variable-in-a-robust-model/48367)

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**Author:** [@RaquelSantos](https://discourse.julialang.org/u/RaquelSantos)\
**Replies:** 2\
**Last updated:** [October 14, 2020, 8:35pm UTC](https://discourse.julialang.org/t/how-to-declare-a-binary-variable-in-a-robust-model/48367 "2020-10-14T20:35:36Z")

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Why is it that whenever I try to compile a binary variable, Julia returns this error to me? In @variable(ModeloD,b\[A\],lower\_bound = 0,Bin): Unrecognized keyword argument lower\_bound Is there a different way of putting…

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## [General question on GPU Programming and on how to use low level C API](https://discourse.julialang.org/t/general-question-on-gpu-programming-and-on-how-to-use-low-level-c-api/39526)

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**Author:** [@Olivier\_Gagnon](https://discourse.julialang.org/u/Olivier_Gagnon)\
**Replies:** 1\
**Last updated:** [October 14, 2020, 6:22pm UTC](https://discourse.julialang.org/t/general-question-on-gpu-programming-and-on-how-to-use-low-level-c-api/39526 "2020-10-14T18:22:12Z")

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Hey everyone, I just started to learn GPU Programming (and also rather new to Julia). I am currently trying to go through Cuda by Example but reproducing everything in Julia. I would have 2 questions (everything is exe…

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## [MD with Subarrays and CuArrays](https://discourse.julialang.org/t/md-with-subarrays-and-cuarrays/48334)

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**Author:** [@bmit](https://discourse.julialang.org/u/bmit)\
**Replies:** 5\
**Last updated:** [October 14, 2020, 3:08pm UTC](https://discourse.julialang.org/t/md-with-subarrays-and-cuarrays/48334 "2020-10-14T15:08:10Z")

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A view of a CuArray has type SubArray. This means a=CUDA.zeros(3,2) b=view(a,:,1) typeof(b) \<: CuArray false If I use multiple dispatch to execute a function on the CPU or GPU depending on the type of the input then…

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## [Tools for cloud computing (AWS, Azure, Google Cloud) with Julia (known to me as of Oct 2020)](https://discourse.julialang.org/t/tools-for-cloud-computing-aws-azure-google-cloud-with-julia-known-to-me-as-of-oct-2020/48368)

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**Author:** [@nickeubank](https://discourse.julialang.org/u/nickeubank)\
**Replies:** 0\
**Last updated:** [October 14, 2020, 2:26pm UTC](https://discourse.julialang.org/t/tools-for-cloud-computing-aws-azure-google-cloud-with-julia-known-to-me-as-of-oct-2020/48368 "2020-10-14T14:26:53Z")

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Azure: Azure API interface in Julia: like Azure CLI, but in Julia. Best set of Azure tools I’ve found (thanks Chevron!): AzManagers (standup VMs and scaled clusters), AzSessions (manage authentication into Azure se…

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