# Specific Domains

**URL:** https://discourse.julialang.org/c/domain/10.md?no_subcategories=false&page=105

[Latest](https://discourse.julialang.org/latest.md) · [Categories](https://discourse.julialang.org/categories.md) · [Tags](https://discourse.julialang.org/tags.md)

**Page:** 106

---

## [ROMS.jl error with invalid dimension parameter](https://discourse.julialang.org/t/roms-jl-error-with-invalid-dimension-parameter/115468)

<div class="topic-metadata">

**Author:** [@Unai\_Ganzedo](https://discourse.julialang.org/u/Unai_Ganzedo)\
**Replies:** 1\
**Last updated:** [June 11, 2024, 11:49am UTC](https://discourse.julialang.org/t/roms-jl-error-with-invalid-dimension-parameter/115468 "2024-06-11T11:49:38Z")

</div>

Hi; I have a question regarding roms.in. I have followed the instructions and I have all the files prepared but when I launch the roms, I get this error..I have tried to search for it but I can’t find it, could you send …

---

## [Forest plot for meta-analisys](https://discourse.julialang.org/t/forest-plot-for-meta-analisys/25985)

<div class="topic-metadata">

**Author:** [@PharmCat](https://discourse.julialang.org/u/PharmCat)\
**Replies:** 3\
**Last updated:** [June 11, 2024, 7:07pm UTC](https://discourse.julialang.org/t/forest-plot-for-meta-analisys/25985 "2024-06-11T19:07:03Z")

</div>

Hello! How can i make this with Julia? Thx!

---

## [Scalar Indexing error when performing mul!(A, B, C) with A a view of a Matrix](https://discourse.julialang.org/t/scalar-indexing-error-when-performing-mul-a-b-c-with-a-a-view-of-a-matrix/115439)

<div class="topic-metadata">

**Author:** [@albertomercurio](https://discourse.julialang.org/u/albertomercurio)\
**Replies:** 3\
**Last updated:** [June 11, 2024, 4:49pm UTC](https://discourse.julialang.org/t/scalar-indexing-error-when-performing-mul-a-b-c-with-a-a-view-of-a-matrix/115439 "2024-06-11T16:49:53Z")

</div>

Hello, I paste also here the issue raised here. Describe the bug The in-place multiplication mul!(A, B, C) fails when A is a vector view of a matrix. To reproduce The Minimal Working Example (MWE) for this bug: us…

---

## [Extracting base symbol from array of symbols](https://discourse.julialang.org/t/extracting-base-symbol-from-array-of-symbols/115476)

<div class="topic-metadata">

**Author:** [@johannesnauta](https://discourse.julialang.org/u/johannesnauta)\
**Replies:** 1\
**Last updated:** [June 11, 2024, 2:45pm UTC](https://discourse.julialang.org/t/extracting-base-symbol-from-array-of-symbols/115476 "2024-06-11T14:45:25Z")

</div>

I am having trouble creating a dictionary from symbols to numbers for defining an ODEProblem. In essence, the problem boils down to having to extract the “base” symbol from a symbolic array. My code is structured in such…

---

## [Handling colors in new \`Makie.voxels\` function](https://discourse.julialang.org/t/handling-colors-in-new-makie-voxels-function/115251)

<div class="topic-metadata">

**Author:** [@juliohm](https://discourse.julialang.org/u/juliohm)\
**Replies:** 9\
**Last updated:** [June 11, 2024, 2:04pm UTC](https://discourse.julialang.org/t/handling-colors-in-new-makie-voxels-function/115251 "2024-06-11T14:04:03Z")

</div>

The new voxels function was introduced in Makie v0.21 to plot 3D Cartesian grids more efficiently. However, it assumes Array{\<:Real,3} for the colors. Can it sill be used with general Colors.jl colors? It is easy to conv…

---

## [Powell's Line Search Algorithm in Julia](https://discourse.julialang.org/t/powells-line-search-algorithm-in-julia/115459)

<div class="topic-metadata">

**Author:** [@TimOb](https://discourse.julialang.org/u/TimOb)\
**Replies:** 5\
**Last updated:** [June 11, 2024, 1:18pm UTC](https://discourse.julialang.org/t/powells-line-search-algorithm-in-julia/115459 "2024-06-11T13:18:15Z")

</div>

I’m looking for a Julia implementation of Powell’s line search algorithm. It’s essentially this algorithm from Scipy: https://docs.scipy.org/doc/scipy/reference/optimize.minimize-powell.html which is similar to the alg…

---

## [Huge increase in variables/constraints with Convex.jl](https://discourse.julialang.org/t/huge-increase-in-variables-constraints-with-convex-jl/115330)

<div class="topic-metadata">

**Author:** [@FriesischScott](https://discourse.julialang.org/u/FriesischScott)\
**Replies:** 8\
**Last updated:** [June 11, 2024, 12:40pm UTC](https://discourse.julialang.org/t/huge-increase-in-variables-constraints-with-convex-jl/115330 "2024-06-11T12:40:32Z")

</div>

I am new to Convex.jl and DCP in general. I am currently working on a convex optimization problem that involves 27 variables constrained to be non-negative. I have formulated the problem in Convex and it shows thefollow…

---

## [Programmatically fixing variables with near-zero coefficients to zero in JuMP](https://discourse.julialang.org/t/programmatically-fixing-variables-with-near-zero-coefficients-to-zero-in-jump/115452)

<div class="topic-metadata">

**Author:** [@Shuvomoy\_Das\_Gupta](https://discourse.julialang.org/u/Shuvomoy_Das_Gupta)\
**Replies:** 6\
**Last updated:** [June 11, 2024, 8:32am UTC](https://discourse.julialang.org/t/programmatically-fixing-variables-with-near-zero-coefficients-to-zero-in-jump/115452 "2024-06-11T08:32:18Z")

</div>

In JuMP, is there a way to programmatically fix the variables, that have zero or near-zero multiplicative coefficients, to zero? A simple toy example (where it is very easy to compute the coefficients) that shows what I …

---

## [Python function cis.read\_data() equivalent in Julia](https://discourse.julialang.org/t/python-function-cis-read-data-equivalent-in-julia/115361)

<div class="topic-metadata">

**Author:** [@raman\_kumar](https://discourse.julialang.org/u/raman_kumar)\
**Replies:** 10\
**Last updated:** [June 11, 2024, 6:34am UTC](https://discourse.julialang.org/t/python-function-cis-read-data-equivalent-in-julia/115361 "2024-06-11T06:34:11Z")

</div>

I want to write Python function cis.read\_data() equivalent in Julia. def read\_data(data\_list, read\_function): """ Wrapper for calling an HDF reading function for each dataset, and then concatenating the result. …

---

## [Mismatch in the cost function in MOSEK with Convex.jl](https://discourse.julialang.org/t/mismatch-in-the-cost-function-in-mosek-with-convex-jl/115374)

<div class="topic-metadata">

**Author:** [@CaG21](https://discourse.julialang.org/u/CaG21)\
**Replies:** 4\
**Last updated:** [June 11, 2024, 12:22am UTC](https://discourse.julialang.org/t/mismatch-in-the-cost-function-in-mosek-with-convex-jl/115374 "2024-06-11T00:22:02Z")

</div>

I am using Convex.jl and MOSEK to solve a mixed integer second-order cone programming problem. The cost function is encoded as minimize(-x + μ \* sum(abs.(v)) - a \* sum(γ)) where x (real value), v (real vector), and γ …

---

## [Augmenting positional labels with their corresponding images for training](https://discourse.julialang.org/t/augmenting-positional-labels-with-their-corresponding-images-for-training/115444)

<div class="topic-metadata">

**Author:** [@mward19](https://discourse.julialang.org/u/mward19)\
**Replies:** 0\
**Last updated:** [June 10, 2024, 8:18pm UTC](https://discourse.julialang.org/t/augmenting-positional-labels-with-their-corresponding-images-for-training/115444 "2024-06-10T20:18:39Z")

</div>

I have used Augmentor.jl to perform data augmentation in the past, and it’s a great package. Recently I have been working with image data whose labels are coordinates (i.e., each label is an (x, y) coordinate specifying …

---

## [GSOC Periodic Orbits](https://discourse.julialang.org/t/gsoc-periodic-orbits/115440)

<div class="topic-metadata">

**Author:** [@JonasKoziorek](https://discourse.julialang.org/u/JonasKoziorek)\
**Replies:** 0\
**Last updated:** [June 10, 2024, 4:27pm UTC](https://discourse.julialang.org/t/gsoc-periodic-orbits/115440 "2024-06-10T16:27:04Z")

</div>

Hi community! My name is Jonas Koziorek and I am one of the Google summer of code (GSOC) contributors for the Julia Language organization this year. I am contributing to DynamicalSystems.jl under guidance of my mentor G…

---

## [How to read a static array of a composite type](https://discourse.julialang.org/t/how-to-read-a-static-array-of-a-composite-type/115436)

<div class="topic-metadata">

**Author:** [@s153283](https://discourse.julialang.org/u/s153283)\
**Replies:** 0\
**Last updated:** [June 10, 2024, 3:54pm UTC](https://discourse.julialang.org/t/how-to-read-a-static-array-of-a-composite-type/115436 "2024-06-10T15:54:55Z")

</div>

I am trying to read arrays of composite types from some binary files using static arrays. I get into some issues reading the data because the sizeof the composite type is not equal to the sizeof the fields summed. Here i…

---

## [Reparametrization trick in Flux.jl](https://discourse.julialang.org/t/reparametrization-trick-in-flux-jl/100489)

<div class="topic-metadata">

**Author:** [@josemanuel22](https://discourse.julialang.org/u/josemanuel22)\
**Replies:** 8\
**Last updated:** [June 10, 2024, 2:16pm UTC](https://discourse.julialang.org/t/reparametrization-trick-in-flux-jl/100489 "2024-06-10T14:16:38Z")

</div>

Does Flux.jl have an equivalent to rsample in PyTorch that automatically implements these stochastic/policy gradients. That way the reparameterized sample becomes differentiable.

---

## [Franklin: how to setup the Deploy.yml file?](https://discourse.julialang.org/t/franklin-how-to-setup-the-deploy-yml-file/115382)

<div class="topic-metadata">

**Author:** [@fmor](https://discourse.julialang.org/u/fmor)\
**Replies:** 0\
**Last updated:** [June 9, 2024, 7:53am UTC](https://discourse.julialang.org/t/franklin-how-to-setup-the-deploy-yml-file/115382 "2024-06-09T07:53:12Z")

</div>

I’m writing since I’m getting complications in deploying my website (hosted with github pages) with Franklin. I’m in the classical situation where locally using serve() all works fine, but not when going online, where t…

---

## [Multi-component pendulum becomes unstable](https://discourse.julialang.org/t/multi-component-pendulum-becomes-unstable/115319)

<div class="topic-metadata">

**Author:** [@natlampen](https://discourse.julialang.org/u/natlampen)\
**Replies:** 2\
**Last updated:** [June 9, 2024, 5:30pm UTC](https://discourse.julialang.org/t/multi-component-pendulum-becomes-unstable/115319 "2024-06-09T17:30:06Z")

</div>

Hi everyone, I have started my journey into using ModelingToolkit. So far it has been working quite well and I am very impressed. I am going down the component-based path. I have a somewhat complex system in mind but I…

---

## [NLOPT forced stop with two constraints](https://discourse.julialang.org/t/nlopt-forced-stop-with-two-constraints/115371)

<div class="topic-metadata">

**Author:** [@mary](https://discourse.julialang.org/u/mary)\
**Replies:** 3\
**Last updated:** [June 9, 2024, 12:06am UTC](https://discourse.julialang.org/t/nlopt-forced-stop-with-two-constraints/115371 "2024-06-09T00:06:51Z")

</div>

Hi I am using NLOPT with two inequality constraints. It can do the optmization when I suppress the second constraint but with two constraints it stops after 1st iteration with forced stop. I also run objective function …

---

## [Tutorial on how to make animations and interactive applications in Makie.jl](https://discourse.julialang.org/t/tutorial-on-how-to-make-animations-and-interactive-applications-in-makie-jl/66988)

<div class="topic-metadata">

**Author:** [@Datseris](https://discourse.julialang.org/u/Datseris)\
**Replies:** 3\
**Last updated:** [June 8, 2024, 10:00pm UTC](https://discourse.julialang.org/t/tutorial-on-how-to-make-animations-and-interactive-applications-in-makie-jl/66988 "2024-06-08T22:00:54Z")

</div>

Hi all, I’ve made a tutorial on how to make animations and interactive applications in Makie.jl and put it on YouTube. Have a look: Making animations and interactive applications in Makie.jl - YouTube Hope it helps!

---

## [Multi-core parallel support for JuMP supported solvers?](https://discourse.julialang.org/t/multi-core-parallel-support-for-jump-supported-solvers/112392)

<div class="topic-metadata">

**Author:** [@charshaw](https://discourse.julialang.org/u/charshaw)\
**Replies:** 26\
**Last updated:** [May 8, 2024, 9:38am UTC](https://discourse.julialang.org/t/multi-core-parallel-support-for-jump-supported-solvers/112392 "2024-05-08T09:38:02Z")

</div>

I am looking for advice on how to enable solver parallelization when using JuMP on a high performance computing cluster. I have read this very informative page, but it is mostly about running many JuMP models in parallel…

---

## [How to rasterize a geopackage (Corine Land Cover)?](https://discourse.julialang.org/t/how-to-rasterize-a-geopackage-corine-land-cover/115316)

<div class="topic-metadata">

**Author:** [@sylvaticus](https://discourse.julialang.org/u/sylvaticus)\
**Replies:** 24\
**Last updated:** [June 8, 2024, 7:24pm UTC](https://discourse.julialang.org/t/how-to-rasterize-a-geopackage-corine-land-cover/115316 "2024-06-08T19:24:42Z")

</div>

Hello, being only marginally on the domain, I am a bit lost with the various GIS packages… I need to rasterize a geopackage (gpkg) vector file (Corine Land Cover). Visualizing the gpkg file in QGis I can see there are …

---

## [Kullback-Leibler divergence for vector and normal distribution](https://discourse.julialang.org/t/kullback-leibler-divergence-for-vector-and-normal-distribution/58246)

<div class="topic-metadata">

**Author:** [@jamblejoe](https://discourse.julialang.org/u/jamblejoe)\
**Replies:** 7\
**Last updated:** [June 8, 2024, 6:22am UTC](https://discourse.julialang.org/t/kullback-leibler-divergence-for-vector-and-normal-distribution/58246 "2024-06-08T06:22:10Z")

</div>

I want to calculate the Kullback-Leibler divergence of data I collected in a vector x, which I interpret as samples from an unknown distribution, and the standard normal distribution. The maths behind the KL divergence a…

---

## [What's wrong with my training data,RNN network work well on demo but bad on mine](https://discourse.julialang.org/t/whats-wrong-with-my-training-data-rnn-network-work-well-on-demo-but-bad-on-mine/115354)

<div class="topic-metadata">

**Author:** [@Bonjour-Lemonde](https://discourse.julialang.org/u/Bonjour-Lemonde)\
**Replies:** 1\
**Last updated:** [June 8, 2024, 5:23am UTC](https://discourse.julialang.org/t/whats-wrong-with-my-training-data-rnn-network-work-well-on-demo-but-bad-on-mine/115354 "2024-06-08T05:23:51Z")

</div>

Hi all! I had a strange problem using Flux RNN, my training data contains myX:one-hot vector, and myY:a number. The training data shown below worked very well using feedforward network(epoch=20,R2=0.9), but very low usin…

---

## [How to use Rasterize in GeoStats.jl](https://discourse.julialang.org/t/how-to-use-rasterize-in-geostats-jl/115338)

<div class="topic-metadata">

**Author:** [@sylvaticus](https://discourse.julialang.org/u/sylvaticus)\
**Replies:** 7\
**Last updated:** [June 7, 2024, 11:47pm UTC](https://discourse.julialang.org/t/how-to-use-rasterize-in-geostats-jl/115338 "2024-06-07T23:47:02Z")

</div>

(note: I am splitting this thread from this one in order to avoid misunderstanding) I can confirm that the latest version of GeoIO can now successfully import a geopackage where the geometries are provided in a Shape co…

---

## [Is there a possibility of transcoding QNDF?](https://discourse.julialang.org/t/is-there-a-possibility-of-transcoding-qndf/114757)

<div class="topic-metadata">

**Author:** [@Pugolas](https://discourse.julialang.org/u/Pugolas)\
**Replies:** 4\
**Last updated:** [June 7, 2024, 6:42pm UTC](https://discourse.julialang.org/t/is-there-a-possibility-of-transcoding-qndf/114757 "2024-06-07T18:42:15Z")

</div>

I am currently working on a \*\*C++\*\*project that requires solving large rigid differential equations. I have learned that QNDF in OrdinariDiffEq.jl is very good at it. Is it possible to complete code conversion based on o…

---

## [How to maximize a scalar function of a scalar argument?](https://discourse.julialang.org/t/how-to-maximize-a-scalar-function-of-a-scalar-argument/115318)

<div class="topic-metadata">

**Author:** [@homocomputeris](https://discourse.julialang.org/u/homocomputeris)\
**Replies:** 1\
**Last updated:** [June 7, 2024, 12:24pm UTC](https://discourse.julialang.org/t/how-to-maximize-a-scalar-function-of-a-scalar-argument/115318 "2024-06-07T12:24:53Z")

</div>

I want to maximize a scala function, say NMaximize\[{1/(x - 1), -10 \< x \< 0}, {x}\] I tried: module test using Optimization, OptimizationOptimJL, NonlinearSolve function f(x, p) return 1 / (x - 1) end u0 = -0.5 p …

---

## [Looping through timeseries points of voronoi](https://discourse.julialang.org/t/looping-through-timeseries-points-of-voronoi/115294)

<div class="topic-metadata">

**Author:** [@Manasa\_S](https://discourse.julialang.org/u/Manasa_S)\
**Replies:** 6\
**Last updated:** [June 7, 2024, 2:09pm UTC](https://discourse.julialang.org/t/looping-through-timeseries-points-of-voronoi/115294 "2024-06-07T14:09:47Z")

</div>

Hi, I want to loop through the voronoi triangles, get their (x,y) cordinates and then check for the density values which i have in a form of 2d array. How can i do that? This is my code: using Distributions mean\_signa…

---

## [Interacting\_pairs() for EventQueueABM](https://discourse.julialang.org/t/interacting-pairs-for-eventqueueabm/115332)

<div class="topic-metadata">

**Author:** [@Sahil\_Khan](https://discourse.julialang.org/u/Sahil_Khan)\
**Replies:** 0\
**Last updated:** [June 7, 2024, 1:28pm UTC](https://discourse.julialang.org/t/interacting-pairs-for-eventqueueabm/115332 "2024-06-07T13:28:22Z")

</div>

Hello, I’m trying to modify interacting\_pairs() function for EventQueueABM model which only looks for true pairs. As EventQueueABM doesn’t have Scheduler. So, I replaced it with allids(model). Now this does give pairs b…

---

## [How to plot isosurfaces of complex scalar fields?](https://discourse.julialang.org/t/how-to-plot-isosurfaces-of-complex-scalar-fields/115293)

<div class="topic-metadata">

**Author:** [@jagot](https://discourse.julialang.org/u/jagot)\
**Replies:** 0\
**Last updated:** [June 6, 2024, 7:21pm UTC](https://discourse.julialang.org/t/how-to-plot-isosurfaces-of-complex-scalar-fields/115293 "2024-06-06T19:21:05Z")

</div>

I would like to plot isosurfaces of a complex-valued scalar field. This is commonly used to visualize atomic and molecular orbitals, where the isosurfaces are taken at some specified magnitudes of the underlying scalar f…

---

## [Sample dependent variables in Turing](https://discourse.julialang.org/t/sample-dependent-variables-in-turing/114993)

<div class="topic-metadata">

**Author:** [@swsw](https://discourse.julialang.org/u/swsw)\
**Replies:** 7\
**Last updated:** [June 7, 2024, 8:31am UTC](https://discourse.julialang.org/t/sample-dependent-variables-in-turing/114993 "2024-06-07T08:31:35Z")

</div>

I’d like to sample two variables X1 ~ Uniform(0,1) and X2 ~ Uniform(0, X1) using Turing @model function model() X1 ~ Uniform(1e-5, 1) X2 ~ Uniform(0, X1) end my\_model = model(); sample(my\_model, NUTS(), 10000) …

---

## [\[ANN\] Training course “Julia for HPC” in Stuttgart, Germany on Sept 10-13, 2024](https://discourse.julialang.org/t/ann-training-course-julia-for-hpc-in-stuttgart-germany-on-sept-10-13-2024/115311)

<div class="topic-metadata">

**Author:** [@carstenbauer](https://discourse.julialang.org/u/carstenbauer)\
**Replies:** 0\
**Last updated:** [June 7, 2024, 7:44am UTC](https://discourse.julialang.org/t/ann-training-course-julia-for-hpc-in-stuttgart-germany-on-sept-10-13-2024/115311 "2024-06-07T07:44:13Z")

</div>

After the great positive feedback of the last two years, there will be another opportunity to learn more about using Julia for high-performance computing this fall! In collaboration with the High-Performance Computing C…

[Previous page](https://discourse.julialang.org/c/domain/10.md?no_subcategories=false&page=104)

[Next page](https://discourse.julialang.org/c/domain/10.md?no_subcategories=false&page=106)