# Specific Domains

**URL:** https://discourse.julialang.org/c/domain/10.md?page=317

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**Page:** 318

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## [Fix incongruencies in ODE models](https://discourse.julialang.org/t/fix-incongruencies-in-ode-models/72880)

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**Author:** [@Luigi\_Marongiu](https://discourse.julialang.org/u/Luigi_Marongiu)\
**Replies:** 2\
**Last updated:** [December 10, 2021, 9:00am UTC](https://discourse.julialang.org/t/fix-incongruencies-in-ode-models/72880 "2021-12-10T09:00:36Z")

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Hello, I am trying to simulate a bacteria/phage infection. I managed, thanks to the forum support, to make a simulation that in principle can change a parameter in the ODEs – but here I am not doing such a change: usi…

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## [Accesing Lagrange multipliers while using Ipopt from Nonconvex.jl](https://discourse.julialang.org/t/accesing-lagrange-multipliers-while-using-ipopt-from-nonconvex-jl/72841)

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**Author:** [@A\_C](https://discourse.julialang.org/u/A_C)\
**Replies:** 2\
**Last updated:** [December 10, 2021, 4:35am UTC](https://discourse.julialang.org/t/accesing-lagrange-multipliers-while-using-ipopt-from-nonconvex-jl/72841 "2021-12-10T04:35:53Z")

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I was trying Nonconvex.jl using Ipopt. Is there a way in which I can access Lagrange multipliers?

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## [Can one set Configuration Options using PlotlyJS.jl?](https://discourse.julialang.org/t/can-one-set-configuration-options-using-plotlyjs-jl/40357)

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**Author:** [@klaff](https://discourse.julialang.org/u/klaff)\
**Replies:** 8\
**Last updated:** [December 9, 2021, 8:28pm UTC](https://discourse.julialang.org/t/can-one-set-configuration-options-using-plotlyjs-jl/40357 "2021-12-09T20:28:21Z")

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This plotly.com page describes configuration options, such as editable, displayModeBar, and displaylogo that I would like to try from Julia and PlotlyJS.jl. Is there a way to send those options? I’ve tried as keywords in…

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## [\`Inf\` does not work in \`quadgk!()\`](https://discourse.julialang.org/t/inf-does-not-work-in-quadgk/72838)

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**Author:** [@HJWang](https://discourse.julialang.org/u/HJWang)\
**Replies:** 2\
**Last updated:** [December 9, 2021, 6:09pm UTC](https://discourse.julialang.org/t/inf-does-not-work-in-quadgk/72838 "2021-12-09T18:09:50Z")

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I tried to use quadgk!(), which is the in-place quadgk(), but encountered problems. Simply put, quadgk!() does not accpet Inf or -Inf in the domain boundary while it is not a problem with quadgk(). The following is a MWE…

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## [JuMP variable container with repeated index](https://discourse.julialang.org/t/jump-variable-container-with-repeated-index/72782)

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**Author:** [@Thomas](https://discourse.julialang.org/u/Thomas)\
**Replies:** 2\
**Last updated:** [December 9, 2021, 10:58am UTC](https://discourse.julialang.org/t/jump-variable-container-with-repeated-index/72782 "2021-12-09T10:58:44Z")

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I wonder how JuMP experts would create an SDP variable over some index matrix constrained during creation. From the docs, it is recommended to constraint variable upon creation if possible. Can the following be improved …

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## [Convert VariableRef to String](https://discourse.julialang.org/t/convert-variableref-to-string/72803)

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**Author:** [@gopal2017](https://discourse.julialang.org/u/gopal2017)\
**Replies:** 2\
**Last updated:** [December 9, 2021, 9:40am UTC](https://discourse.julialang.org/t/convert-variableref-to-string/72803 "2021-12-09T09:40:07Z")

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We can use string(variable) to convert integer variable to string. Can we convert VariableRef to string? VariableRef we are getting from math model. I tried with parse(AbstractString,VariableRef) or string(VariableRef)…

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## [Gurobi not running the right version?](https://discourse.julialang.org/t/gurobi-not-running-the-right-version/72808)

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**Author:** [@Marc\_Sevaux](https://discourse.julialang.org/u/Marc_Sevaux)\
**Replies:** 4\
**Last updated:** [December 9, 2021, 9:20am UTC](https://discourse.julialang.org/t/gurobi-not-running-the-right-version/72808 "2021-12-09T09:20:31Z")

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Hi, I’ve installed the latest version of gurobi solver (9.5.0) and reinstalled the Gurobi package. When I try to solve a ILP model, it seems that the gurobi solver is still using a previous version (9.1.2). Did I miss…

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## [How to change the value of a parameter with DifferentialEquations?](https://discourse.julialang.org/t/how-to-change-the-value-of-a-parameter-with-differentialequations/72752)

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**Author:** [@Luigi\_Marongiu](https://discourse.julialang.org/u/Luigi_Marongiu)\
**Replies:** 7\
**Last updated:** [December 8, 2021, 1:53pm UTC](https://discourse.julialang.org/t/how-to-change-the-value-of-a-parameter-with-differentialequations/72752 "2021-12-08T13:53:21Z")

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Hello, I have a series of differential equations, and I can change the value of the integrator with a back call like this: condition(u, t, integrator) = t==1000 # time of alteration affect!(integrator) = in…

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## [How to fix GLMakie window while developing on VSCode?](https://discourse.julialang.org/t/how-to-fix-glmakie-window-while-developing-on-vscode/72772)

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**Author:** [@juliohm](https://discourse.julialang.org/u/juliohm)\
**Replies:** 0\
**Last updated:** [December 8, 2021, 1:52pm UTC](https://discourse.julialang.org/t/how-to-fix-glmakie-window-while-developing-on-vscode/72772 "2021-12-08T13:52:47Z")

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There are few related questions on the forum but I couldn’t find the answer. Is there any option to fix the GLMakie window say to the right of the monitor and VSCode to the left so that whenever we run a new plot the win…

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## [Read MPS file using MathOptInterface and extract each variable from MOI](https://discourse.julialang.org/t/read-mps-file-using-mathoptinterface-and-extract-each-variable-from-moi/72753)

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**Author:** [@gopal2017](https://discourse.julialang.org/u/gopal2017)\
**Replies:** 2\
**Last updated:** [December 8, 2021, 1:28pm UTC](https://discourse.julialang.org/t/read-mps-file-using-mathoptinterface-and-extract-each-variable-from-moi/72753 "2021-12-08T13:28:42Z")

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Please read the below code. It can read MPS file. How can I get each variable from m? Please share the code. using JuMP using GLPK using MathOptInterface const MOI = MathOptInterface mathoptformat\_model = MOI.FileFo…

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## [Traces of transformed variables within Turing.jl models](https://discourse.julialang.org/t/traces-of-transformed-variables-within-turing-jl-models/53013)

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**Author:** [@BradGroff](https://discourse.julialang.org/u/BradGroff)\
**Replies:** 7\
**Last updated:** [December 8, 2021, 7:33am UTC](https://discourse.julialang.org/t/traces-of-transformed-variables-within-turing-jl-models/53013 "2021-12-08T07:33:58Z")

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Hi all, Is it possible to make Turing return the transformations of random variables in chains? For instance: @model function silly\_example(y) x ~ Beta(1,1) z = x \> 0.5 # This guy! y ~ Normal…

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## [Specify AsTable output column names](https://discourse.julialang.org/t/specify-astable-output-column-names/72742)

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**Author:** [@jzr](https://discourse.julialang.org/u/jzr)\
**Replies:** 2\
**Last updated:** [December 8, 2021, 7:31am UTC](https://discourse.julialang.org/t/specify-astable-output-column-names/72742 "2021-12-08T07:31:53Z")

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Can I specify the name of the output column? using DataFrames, Chain @chain DataFrame(a=\[1,2,3,1,2,3\], b=\[:x, :y, :z, :x, :y, :x\]) begin groupby(:a) combine(:b=\>unique=\>:b, :b =\> (b-\>mean.(map(b₀-\>b₀.==b, unique(b)))) =\>…

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## [Citing error in bib file for Graph jl](https://discourse.julialang.org/t/citing-error-in-bib-file-for-graph-jl/72701)

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**Author:** [@yusri-dh](https://discourse.julialang.org/u/yusri-dh)\
**Replies:** 2\
**Last updated:** [December 8, 2021, 1:55am UTC](https://discourse.julialang.org/t/citing-error-in-bib-file-for-graph-jl/72701 "2021-12-08T01:55:05Z")

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I am trying to cite Graphs jl in paper using the citation bib inside the github page: @misc{Graphs2021, author = {James Fairbanks, Mathieu Besançon, Simon Schölly, Júlio Hoffiman, Nick Eubank, and Stefan Karpin…

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## [Optimal model creation (and garbage collection)](https://discourse.julialang.org/t/optimal-model-creation-and-garbage-collection/72619)

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**Author:** [@sstroemer](https://discourse.julialang.org/u/sstroemer)\
**Replies:** 20\
**Last updated:** [December 7, 2021, 11:25pm UTC](https://discourse.julialang.org/t/optimal-model-creation-and-garbage-collection/72619 "2021-12-07T23:25:46Z")

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Hi! I’m rather new to JuMP (and Julia) and I’m trying to compare the speed of creating a model using JuMP to an existing Python project (trying to decide whether it would be beneficial to switch to JuMP, now that 1.0 is …

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## [Unexpected behavior of QuadGK with extended precision floats](https://discourse.julialang.org/t/unexpected-behavior-of-quadgk-with-extended-precision-floats/72684)

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**Author:** [@PeterSimon](https://discourse.julialang.org/u/PeterSimon)\
**Replies:** 4\
**Last updated:** [December 7, 2021, 9:42pm UTC](https://discourse.julialang.org/t/unexpected-behavior-of-quadgk-with-extended-precision-floats/72684 "2021-12-07T21:42:36Z")

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This topic arose from a topic in the Fortran Discourse group. Calling the gauss function from the QuadGK package produces different results depending on how it was previously called. Here is an example: …

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## [Who is using Dagger?](https://discourse.julialang.org/t/who-is-using-dagger/71970)

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**Author:** [@jpsamaroo](https://discourse.julialang.org/u/jpsamaroo)\
**Replies:** 12\
**Last updated:** [December 7, 2021, 5:19pm UTC](https://discourse.julialang.org/t/who-is-using-dagger/71970 "2021-12-07T17:19:19Z")

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Hey all! I’m interested in finding out who in the community is using Dagger, or has used Dagger in the past. If so, I would appreciate if you could provide answers to any of the following questions: What kind of proble…

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## [Probabilistic bone classification - is probabilistic graphical model good idea?](https://discourse.julialang.org/t/probabilistic-bone-classification-is-probabilistic-graphical-model-good-idea/72703)

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**Author:** [@Jakub\_Mitura](https://discourse.julialang.org/u/Jakub_Mitura)\
**Replies:** 0\
**Last updated:** [December 7, 2021, 9:49am UTC](https://discourse.julialang.org/t/probabilistic-bone-classification-is-probabilistic-graphical-model-good-idea/72703 "2021-12-07T09:49:57Z")

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Hello I want to create a probabilistic graphical model for bones classification from PET/CT scan with uncertainity quantification, but I am not sure is it good idea and how to start . So the general plan how I imagine i…

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## [CUDA Matrix inverse](https://discourse.julialang.org/t/cuda-matrix-inverse/53341)

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**Author:** [@PharmCat](https://discourse.julialang.org/u/PharmCat)\
**Replies:** 13\
**Last updated:** [December 7, 2021, 6:47am UTC](https://discourse.julialang.org/t/cuda-matrix-inverse/53341 "2021-12-07T06:47:23Z")

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Hello! I try to inverse large matrix on GPU and try to use this code: using CUDA, LinearAlgebra function cuinv(m::Matrix{T}) where T if size(m, 1) != size(m, 2) throw(ArgumentError("Matrix not square.")) end A …

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## [Loading CSV file to TimeSeries data](https://discourse.julialang.org/t/loading-csv-file-to-timeseries-data/72662)

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**Author:** [@v-i-s-h](https://discourse.julialang.org/u/v-i-s-h)\
**Replies:** 3\
**Last updated:** [December 7, 2021, 4:39am UTC](https://discourse.julialang.org/t/loading-csv-file-to-timeseries-data/72662 "2021-12-07T04:39:46Z")

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Hi, I am trying to load some OHLC data into TimeArray (from TimeSeries.jl). The documentation (Tables.jl Interface Integration · TimeSeries.jl) says I can load it directly as using CSV TimeArray(CSV.File(filename), tim…

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## [How does ModelingToolkit substitute the u0map?](https://discourse.julialang.org/t/how-does-modelingtoolkit-substitute-the-u0map/72688)

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**Author:** [@cjwyett](https://discourse.julialang.org/u/cjwyett)\
**Replies:** 2\
**Last updated:** [December 7, 2021, 3:48am UTC](https://discourse.julialang.org/t/how-does-modelingtoolkit-substitute-the-u0map/72688 "2021-12-07T03:48:10Z")

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Hi there, I’m trying to port some code over to use Catalyst. using Catalyst, Symbolics rs = @reaction\_network begin 1, 2A --\> B 2, B + C --\> 0 end v = Catalyst.oderatelaw.(reactions(rs)) u0 = \[1,1,1\] Now if i…

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## [ExtraVariableSystemException while working with DiffEqOperators.jl](https://discourse.julialang.org/t/extravariablesystemexception-while-working-with-diffeqoperators-jl/72535)

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**Author:** [@youainti](https://discourse.julialang.org/u/youainti)\
**Replies:** 2\
**Last updated:** [December 6, 2021, 11:39pm UTC](https://discourse.julialang.org/t/extravariablesystemexception-while-working-with-diffeqoperators-jl/72535 "2021-12-06T23:39:03Z")

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I’ve run into two issues while using DiffEqOperators.jl to solve the Feynman-Kac Formula through the method of lines. Here is the setup to the problem: #setup symbols @parameters τ y @variables f(..) Dτ = Differential(…

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## [Compositional Sampling in Turing - getting exactly same samples (standard deviation is zero)](https://discourse.julialang.org/t/compositional-sampling-in-turing-getting-exactly-same-samples-standard-deviation-is-zero/72326)

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**Author:** [@rkmalaiya](https://discourse.julialang.org/u/rkmalaiya)\
**Replies:** 13\
**Last updated:** [December 6, 2021, 8:09pm UTC](https://discourse.julialang.org/t/compositional-sampling-in-turing-getting-exactly-same-samples-standard-deviation-is-zero/72326 "2021-12-06T20:09:16Z")

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Hello Everyone, I have just started to use Turing. I want to implement a DINA Model ( DINA Model and Parameter Estimation: A Didactic (jstor.org)) which contains both discrete and continuous random variables. Hence, I w…

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## [Approximation matching asymptotes](https://discourse.julialang.org/t/approximation-matching-asymptotes/72648)

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**Author:** [@Tamas\_Papp](https://discourse.julialang.org/u/Tamas_Papp)\
**Replies:** 3\
**Last updated:** [December 6, 2021, 7:36pm UTC](https://discourse.julialang.org/t/approximation-matching-asymptotes/72648 "2021-12-06T19:36:46Z")

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I have a function f: \\mathbb{R} \\to \\mathbb{R} that is expensive to calculate (implicitly defined, needs iterative methods). But otherwise f is well-behaved: continuous, differentiable, and strictly increasing on all the…

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## [Julia 1.7 & CUDA on Windows 11](https://discourse.julialang.org/t/julia-1-7-cuda-on-windows-11/72488)

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**Author:** [@00shiv](https://discourse.julialang.org/u/00shiv)\
**Replies:** 6\
**Last updated:** [December 6, 2021, 6:56pm UTC](https://discourse.julialang.org/t/julia-1-7-cuda-on-windows-11/72488 "2021-12-06T18:56:57Z")

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I am not able to get CUDA installed on Julia 1.7 on Windows 11 (not even with WSL). The errors seem to be the same in both cases as it is not able to install LLVM properly. The error seems to be “could not load symbol “L…

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## [What are some recommended ways to create networks of ensembles of neurons?](https://discourse.julialang.org/t/what-are-some-recommended-ways-to-create-networks-of-ensembles-of-neurons/72673)

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**Author:** [@yohan](https://discourse.julialang.org/u/yohan)\
**Replies:** 0\
**Last updated:** [December 6, 2021, 6:35pm UTC](https://discourse.julialang.org/t/what-are-some-recommended-ways-to-create-networks-of-ensembles-of-neurons/72673 "2021-12-06T18:35:18Z")

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Hi! I’m very new to Julia and considering migrating my Izhikevich neuronal network simulations to Julia from MATLAB. I was wondering about ways of implementing interactions among ensembles of units. I’d like to have pop…

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## [Show waveform as part of larger program](https://discourse.julialang.org/t/show-waveform-as-part-of-larger-program/72668)

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**Author:** [@Nenndul](https://discourse.julialang.org/u/Nenndul)\
**Replies:** 2\
**Last updated:** [December 6, 2021, 5:47pm UTC](https://discourse.julialang.org/t/show-waveform-as-part-of-larger-program/72668 "2021-12-06T17:47:54Z")

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I am using PortAudio to input and process an audio stream Just a very basic thing: stream = PortAudioStream("Microphone (5- UMC204HD 192k)", 1, 0) buf = read(stream, 5s) But when I use this inside of the larger progr…

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## [GalactimOptim + AutoForwardDiff + IPNewton problem](https://discourse.julialang.org/t/galactimoptim-autoforwarddiff-ipnewton-problem/72508)

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**Author:** [@mottelet](https://discourse.julialang.org/u/mottelet)\
**Replies:** 6\
**Last updated:** [December 6, 2021, 3:44pm UTC](https://discourse.julialang.org/t/galactimoptim-autoforwarddiff-ipnewton-problem/72508 "2021-12-06T15:44:41Z")

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Hi, I am trying to solve a parameter fitting problem in a stiff biological ODE. The problem solves with correct precision in Matlab (with fmincon/IP) using the complex-step technique to compute the gradient, but since I…

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## [PBS cluster: "Syntax error: redirection unexpected" and "nested task error: Unable to read host:port string from worker."](https://discourse.julialang.org/t/pbs-cluster-syntax-error-redirection-unexpected-and-nested-task-error-unable-to-read-host-port-string-from-worker/72620)

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**Author:** [@anon28281882](https://discourse.julialang.org/u/anon28281882)\
**Replies:** 1\
**Last updated:** [December 6, 2021, 2:50pm UTC](https://discourse.julialang.org/t/pbs-cluster-syntax-error-redirection-unexpected-and-nested-task-error-unable-to-read-host-port-string-from-worker/72620 "2021-12-06T14:50:42Z")

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Hi, I am new to Distributed computing. Everything works fine with Distributed on one machine. It seems that everything works fine on two machines with MPI.jl (it seems to be slower than Distributed on one machine but wo…

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## [CairoMakie returning empty plots](https://discourse.julialang.org/t/cairomakie-returning-empty-plots/72581)

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**Author:** [@hiraksarkar](https://discourse.julialang.org/u/hiraksarkar)\
**Replies:** 5\
**Last updated:** [December 6, 2021, 1:21pm UTC](https://discourse.julialang.org/t/cairomakie-returning-empty-plots/72581 "2021-12-06T13:21:24Z")

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Hi, I am new to julia, I want plot a simple scatterplot from a dataframe where the colors are coded as String7 hexadecimal code, a snapshot, Row │ x y ncv\_color │ Int64 Int64 String7 ─────┼────────…

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## [Any 'getting started' docs/links for GeoJulia ecosystem?](https://discourse.julialang.org/t/any-getting-started-docs-links-for-geojulia-ecosystem/72040)

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**Author:** [@byezy](https://discourse.julialang.org/u/byezy)\
**Replies:** 3\
**Last updated:** [December 6, 2021, 12:24pm UTC](https://discourse.julialang.org/t/any-getting-started-docs-links-for-geojulia-ecosystem/72040 "2021-12-06T12:24:23Z")

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Looking for a ‘getting started’ entry point for using GeoJulia for basic geospatial work that ties all of the packages and their capabilities/usage together… does anything exist?

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