# Specific Domains

**URL:** https://discourse.julialang.org/c/domain/10.md?no_subcategories=false&page=340

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**Page:** 341

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## [Hide axis labels](https://discourse.julialang.org/t/hide-axis-labels/67443)

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**Author:** [@jzr](https://discourse.julialang.org/u/jzr)\
**Replies:** 2\
**Last updated:** [August 31, 2021, 7:34pm UTC](https://discourse.julialang.org/t/hide-axis-labels/67443 "2021-08-31T19:34:38Z")

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using WGLMakie n = 500 x = 1:n y = randn(n) c = rand('a':'d', n) spec = data((;x,y,c)) \* visual(Scatter) \* mapping(:x, :y, row=:c) draw(spec, axis=(; ylabelvisible=false)) How can I hide each of these labels? y -…

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## [Julia and QuestDB](https://discourse.julialang.org/t/julia-and-questdb/67434)

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**Author:** [@dm13450](https://discourse.julialang.org/u/dm13450)\
**Replies:** 2\
**Last updated:** [August 31, 2021, 5:29pm UTC](https://discourse.julialang.org/t/julia-and-questdb/67434 "2021-08-31T17:29:57Z")

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I’ve written two blog posts about using Julia with QuestDB. This is a type of database that specialises in time series data, so in part 1 I’ve written about connecting to a WebSocket to ingest streaming data into QuestD…

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## [What does "surprising behaviors" in the documentation of ITensor mean?](https://discourse.julialang.org/t/what-does-surprising-behaviors-in-the-documentation-of-itensor-mean/67408)

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**Author:** [@wujinq](https://discourse.julialang.org/u/wujinq)\
**Replies:** 2\
**Last updated:** [August 31, 2021, 5:09pm UTC](https://discourse.julialang.org/t/what-does-surprising-behaviors-in-the-documentation-of-itensor-mean/67408 "2021-08-31T17:09:48Z")

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In this page it is said that The reason we recommend the let...end block is that code written in the Julia global scope can have some surprising behaviors. Putting your code into a let block avoids these issues. What…

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## [Neural ODE with Evolutionary Parameters](https://discourse.julialang.org/t/neural-ode-with-evolutionary-parameters/65736)

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**Author:** [@Saad](https://discourse.julialang.org/u/Saad)\
**Replies:** 7\
**Last updated:** [August 31, 2021, 4:17pm UTC](https://discourse.julialang.org/t/neural-ode-with-evolutionary-parameters/65736 "2021-08-31T16:17:02Z")

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Hello everyone, I would like to know if there is a package on Julia adapted to Neural ODEs with time dependent parameters, or if there is a practical example of code use to allow evolution of the neural network paramete…

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## [Context menu in Makie?](https://discourse.julialang.org/t/context-menu-in-makie/66728)

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**Author:** [@RainerHeintzmann](https://discourse.julialang.org/u/RainerHeintzmann)\
**Replies:** 10\
**Last updated:** [August 31, 2021, 2:44pm UTC](https://discourse.julialang.org/t/context-menu-in-makie/66728 "2021-08-31T14:44:59Z")

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Does Makie support context menus, e.g. reachable by right clicking into a view that is covered by a particular axis? This would be a great feature.

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## [Converting a directed graph to undirected](https://discourse.julialang.org/t/converting-a-directed-graph-to-undirected/66932)

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**Author:** [@rachithaiyappa](https://discourse.julialang.org/u/rachithaiyappa)\
**Replies:** 4\
**Last updated:** [August 31, 2021, 2:16pm UTC](https://discourse.julialang.org/t/converting-a-directed-graph-to-undirected/66932 "2021-08-31T14:16:16Z")

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I am reading a graph from an edge list and then trying to convert the directed graph into undirected as follows. using GraphIO using SimpleGraphs data = "network.txt" #edge list of the network g = loadgraph(data,GraphI…

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## [Flux model with \`SubArray\` parameters don't work on GPU](https://discourse.julialang.org/t/flux-model-with-subarray-parameters-dont-work-on-gpu/60401)

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**Author:** [@ArthurW](https://discourse.julialang.org/u/ArthurW)\
**Replies:** 4\
**Last updated:** [August 31, 2021, 12:14pm UTC](https://discourse.julialang.org/t/flux-model-with-subarray-parameters-dont-work-on-gpu/60401 "2021-08-31T12:14:14Z")

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Hi everyone, I’m trying to compute the gradient for a “submodel” of a Flux model. That is, I’m defining layers with SubArrays of the original weights as parameters. julia\> using Flux julia\> X = rand(4, 1000) |\> gpu; …

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## [How to understand MapReduce](https://discourse.julialang.org/t/how-to-understand-mapreduce/67418)

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**Author:** [@Jakub\_Mitura](https://discourse.julialang.org/u/Jakub_Mitura)\
**Replies:** 1\
**Last updated:** [August 31, 2021, 11:23am UTC](https://discourse.julialang.org/t/how-to-understand-mapreduce/67418 "2021-08-31T11:23:45Z")

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Hello I am analyzing CUDA.jl mapReduce.jl file and I see two things that I do not understand First I see that function shfl\_down\_sync is avoided when type of data is another than Bool, Int32, Int64, Float32, Float64, …

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## [Makie allocations and speed](https://discourse.julialang.org/t/makie-allocations-and-speed/67376)

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**Author:** [@RainerHeintzmann](https://discourse.julialang.org/u/RainerHeintzmann)\
**Replies:** 4\
**Last updated:** [August 31, 2021, 11:20am UTC](https://discourse.julialang.org/t/makie-allocations-and-speed/67376 "2021-08-31T11:20:14Z")

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Writing a little GUI for visualizing ND data in GLMakie.jl we noted that the allocations are rather high in Makie, which may be one reason that the startup time is significant. The data to visualize is minute (e.g. 2x2x…

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## [Sensitivity analysis on Non-diagonal noise SDEs](https://discourse.julialang.org/t/sensitivity-analysis-on-non-diagonal-noise-sdes/67413)

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**Author:** [@alvestad10](https://discourse.julialang.org/u/alvestad10)\
**Replies:** 1\
**Last updated:** [August 31, 2021, 10:06am UTC](https://discourse.julialang.org/t/sensitivity-analysis-on-non-diagonal-noise-sdes/67413 "2021-08-31T10:06:45Z")

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I am trying to do a parameter optimization of an SDE with non-diagonal constant noise. A simplified version of the implementation is (SDE reduced to the simplest possible version which still have the problem) using Stoc…

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## [How to use strings to specify plot axes in VegaLite.jl?](https://discourse.julialang.org/t/how-to-use-strings-to-specify-plot-axes-in-vegalite-jl/67405)

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**Author:** [@amrods](https://discourse.julialang.org/u/amrods)\
**Replies:** 2\
**Last updated:** [August 31, 2021, 7:57am UTC](https://discourse.julialang.org/t/how-to-use-strings-to-specify-plot-axes-in-vegalite-jl/67405 "2021-08-31T07:57:40Z")

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How can I use strings to call columns of a DataFrame in VegaLite.jl? using DataFrames using VegaLite df = DataFrame("x" =\> 1:5, "y.α" =\> 1:5) df |\> @vlplot( :line, x = "x", y = "y.α" ) ERROR: LoadError: ArgumentEr…

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## [Build-in markers for 3D scatter](https://discourse.julialang.org/t/build-in-markers-for-3d-scatter/67358)

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**Author:** [@phlavenk](https://discourse.julialang.org/u/phlavenk)\
**Replies:** 2\
**Last updated:** [August 31, 2021, 6:00am UTC](https://discourse.julialang.org/t/build-in-markers-for-3d-scatter/67358 "2021-08-31T06:00:52Z")

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Hi, In a 3D plot I’m trying to combine a semi-transparent mesh (detector body) with a scatter plot of particle hits in its surface (might not lie exactly on the surface, sometimes above or below, depending on the traject…

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## [GLMakie record gives LoadError: IOError: write: broken pipe (EPIPE)](https://discourse.julialang.org/t/glmakie-record-gives-loaderror-ioerror-write-broken-pipe-epipe/64425)

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**Author:** [@bedosh](https://discourse.julialang.org/u/bedosh)\
**Replies:** 5\
**Last updated:** [August 31, 2021, 5:24am UTC](https://discourse.julialang.org/t/glmakie-record-gives-loaderror-ioerror-write-broken-pipe-epipe/64425 "2021-08-31T05:24:30Z")

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I am trying to get GLMakie record to work. Trying the example code from http://makie.juliaplots.org/stable/animation.html: using GLMakie using Makie.Colors fig, ax, lineplot = lines(0..10, sin; linewidth=10) # animat…

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## [Converting a BUGS model to Turing, simple linear regression](https://discourse.julialang.org/t/converting-a-bugs-model-to-turing-simple-linear-regression/67340)

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**Author:** [@areding](https://discourse.julialang.org/u/areding)\
**Replies:** 5\
**Last updated:** [August 31, 2021, 2:56am UTC](https://discourse.julialang.org/t/converting-a-bugs-model-to-turing-simple-linear-regression/67340 "2021-08-31T02:56:12Z")

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Hello everyone, I’m thinking about translating a course that focuses on WinBUGS to Turing so the students can use something a little more modern if they want. I’m new to Julia and Turing. Here is the WinBUGS model: fo…

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## [Makie: layout of IntervalSlider and Slider and custom labels/text display](https://discourse.julialang.org/t/makie-layout-of-intervalslider-and-slider-and-custom-labels-text-display/67241)

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**Author:** [@Audrius-St](https://discourse.julialang.org/u/Audrius-St)\
**Replies:** 8\
**Last updated:** [August 30, 2021, 11:47pm UTC](https://discourse.julialang.org/t/makie-layout-of-intervalslider-and-slider-and-custom-labels-text-display/67241 "2021-08-30T23:47:35Z")

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Hello, Three questions regarding Makie layout of IntervalSlider and Slider. On the left side of the above image, I would like to have a :grey10 background for the IntervalSlider and Slider as in the Textbox. Howev…

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## [Compute double multipole expansion](https://discourse.julialang.org/t/compute-double-multipole-expansion/67059)

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**Author:** [@mleprovost](https://discourse.julialang.org/u/mleprovost)\
**Replies:** 6\
**Last updated:** [August 30, 2021, 6:53pm UTC](https://discourse.julialang.org/t/compute-double-multipole-expansion/67059 "2021-08-30T18:53:06Z")

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Hello, I am working on the calculation of the pressure induced at d locations \\{\\xi\_1, \\ldots, \\xi\_d\\} due to a set of n singularities located at \\{z\_1, \\ldots, z\_n\\} with strength \\{ S\_1, \\ldots, S\_n\\}, where \\xi\_i, z\_…

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## [Gamma correction for colormaps](https://discourse.julialang.org/t/gamma-correction-for-colormaps/67227)

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**Author:** [@RainerHeintzmann](https://discourse.julialang.org/u/RainerHeintzmann)\
**Replies:** 8\
**Last updated:** [August 30, 2021, 5:56pm UTC](https://discourse.julialang.org/t/gamma-correction-for-colormaps/67227 "2021-08-30T17:56:44Z")

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Is there a way to have a gamma Node, which is linked to the gamma value of a colormap in Makie? Colorbars can have limits, but no gamma yet as it seems. Is it possible to implement this into Makie or can one write a col…

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## [Libraries for constrained genetics algorithm](https://discourse.julialang.org/t/libraries-for-constrained-genetics-algorithm/66978)

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**Author:** [@Hilaire\_Foillard](https://discourse.julialang.org/u/Hilaire_Foillard)\
**Replies:** 7\
**Last updated:** [August 30, 2021, 3:24pm UTC](https://discourse.julialang.org/t/libraries-for-constrained-genetics-algorithm/66978 "2021-08-30T15:24:48Z")

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Hello, I’m an engineer in operational research and I was working on a MILP. Since the problem was to big I decided to use Benders cut. But it’s still very big so I want to change my method and to use genetics algorithm. …

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## [PyPlot plot\_date issue (year 3990) - Solved](https://discourse.julialang.org/t/pyplot-plot-date-issue-year-3990-solved/67345)

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**Author:** [@Daneel](https://discourse.julialang.org/u/Daneel)\
**Replies:** 0\
**Last updated:** [August 30, 2021, 12:05pm UTC](https://discourse.julialang.org/t/pyplot-plot-date-issue-year-3990-solved/67345 "2021-08-30T12:05:38Z")

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Recently I installed Julia on a new computer and using code I knew that works, PyPlot displayed dates far in the future. I was plotting data from the previous week (August 2021) and plot\_date was displaying the dates in …

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## [Flux: Hidden problem broadcasting convolution layer on GPU?](https://discourse.julialang.org/t/flux-hidden-problem-broadcasting-convolution-layer-on-gpu/67316)

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**Author:** [@MattSainsbury-Dale](https://discourse.julialang.org/u/MattSainsbury-Dale)\
**Replies:** 1\
**Last updated:** [August 30, 2021, 3:13am UTC](https://discourse.julialang.org/t/flux-hidden-problem-broadcasting-convolution-layer-on-gpu/67316 "2021-08-30T03:13:42Z")

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I found the following comment in the source code for the Conv layer for Flux.jl: function (c::Conv)(x::AbstractArray) # TODO: breaks gpu broadcast :( It’s a bit concerning, given that I am currently working on a proj…

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## [Reading large csv file](https://discourse.julialang.org/t/reading-large-csv-file/67258)

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**Author:** [@xinchin](https://discourse.julialang.org/u/xinchin)\
**Replies:** 12\
**Last updated:** [August 30, 2021, 12:10am UTC](https://discourse.julialang.org/t/reading-large-csv-file/67258 "2021-08-30T00:10:20Z")

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I checked some answers and all point to CSV.jl, but it is slow(i guess this is “time to first plot” issue), it uses a lot of memory, it produces some strange type of array as output… Do I have another choice?

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## [Having second axis in pgfplotsx](https://discourse.julialang.org/t/having-second-axis-in-pgfplotsx/67315)

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**Author:** [@xinchin](https://discourse.julialang.org/u/xinchin)\
**Replies:** 0\
**Last updated:** [August 30, 2021, 12:06am UTC](https://discourse.julialang.org/t/having-second-axis-in-pgfplotsx/67315 "2021-08-30T00:06:55Z")

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is it possible to have second axis for x and y when using PGFPlotsX.jl? thanks

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## [How do I change the values of a dataframe within a dictionary](https://discourse.julialang.org/t/how-do-i-change-the-values-of-a-dataframe-within-a-dictionary/67231)

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**Author:** [@brett\_knoss](https://discourse.julialang.org/u/brett_knoss)\
**Replies:** 11\
**Last updated:** [August 29, 2021, 5:26pm UTC](https://discourse.julialang.org/t/how-do-i-change-the-values-of-a-dataframe-within-a-dictionary/67231 "2021-08-29T17:26:06Z")

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I’d like to know how to change the values of a dataframe, and ultimately a dataframe within a dictionary. starting\_balance=( starting\_balance\["debit"\]\["assets"\]\[account\]=\>( DataFrame( date=Vector{String}("31 …

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## [Plotting weighted graphs?](https://discourse.julialang.org/t/plotting-weighted-graphs/67277)

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**Author:** [@Tqft](https://discourse.julialang.org/u/Tqft)\
**Replies:** 1\
**Last updated:** [August 29, 2021, 10:52am UTC](https://discourse.julialang.org/t/plotting-weighted-graphs/67277 "2021-08-29T10:52:45Z")

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I’m dealing with weighted graphs (Dynkin diagrams for example) and need a simple way to plot them, preferably even on the terminal (in most examples the user would like to look at there are only a few vertices). Is there…

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## [Df\["col"\] syntax](https://discourse.julialang.org/t/df-col-syntax/67254)

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**Author:** [@xinchin](https://discourse.julialang.org/u/xinchin)\
**Replies:** 8\
**Last updated:** [August 29, 2021, 8:46am UTC](https://discourse.julialang.org/t/df-col-syntax/67254 "2021-08-29T08:46:34Z")

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is it possible to have df\[“col”\] syntax in DataFrames.jl? currently it throws error

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## [New user: DataFrames or TypedTable](https://discourse.julialang.org/t/new-user-dataframes-or-typedtable/67251)

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**Author:** [@xinchin](https://discourse.julialang.org/u/xinchin)\
**Replies:** 8\
**Last updated:** [August 29, 2021, 8:40am UTC](https://discourse.julialang.org/t/new-user-dataframes-or-typedtable/67251 "2021-08-29T08:40:22Z")

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hi Wondering which one is better for data wrangling in general? I want to do some data science things e.g. wrangle, group, aggregate… both ok, but which one is better in long run?

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## [How to broadcast or batch multiply a "batch" of matrices with another matrix on the GPU?](https://discourse.julialang.org/t/how-to-broadcast-or-batch-multiply-a-batch-of-matrices-with-another-matrix-on-the-gpu/67259)

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**Author:** [@xiaodai](https://discourse.julialang.org/u/xiaodai)\
**Replies:** 1\
**Last updated:** [August 29, 2021, 3:56am UTC](https://discourse.julialang.org/t/how-to-broadcast-or-batch-multiply-a-batch-of-matrices-with-another-matrix-on-the-gpu/67259 "2021-08-29T03:56:06Z")

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I have a 3 dimension tensor, where each “slice” of the tensor is a matrix. I want to multiple each slice by another matrix and store there result in a 3D tensor/array. How do I do that in the most efficient way using t…

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## [How to view which model the variable belongs to?](https://discourse.julialang.org/t/how-to-view-which-model-the-variable-belongs-to/67233)

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**Author:** [@iiitr](https://discourse.julialang.org/u/iiitr)\
**Replies:** 4\
**Last updated:** [August 29, 2021, 1:59am UTC](https://discourse.julialang.org/t/how-to-view-which-model-the-variable-belongs-to/67233 "2021-08-29T01:59:17Z")

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Hi, all Here, I create two variables which belong to two different model, respectively, like: m1 = Model() m2 = Model() @variable(m1, x) @variable(m2, y) How can I know x and y belong to which model? I already kno…

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## [Speeding up gradients for custom neural network - currently much slower than in PyTorch](https://discourse.julialang.org/t/speeding-up-gradients-for-custom-neural-network-currently-much-slower-than-in-pytorch/50637)

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**Author:** [@Andreas\_Schlaginhauf](https://discourse.julialang.org/u/Andreas_Schlaginhauf)\
**Replies:** 16\
**Last updated:** [August 28, 2021, 4:52pm UTC](https://discourse.julialang.org/t/speeding-up-gradients-for-custom-neural-network-currently-much-slower-than-in-pytorch/50637 "2021-08-28T16:52:49Z")

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I am currently trying to implement stable neural ODEs according to https://arxiv.org/pdf/2001.06116.pdf. This includes an ODE function, (m::StableDynamics)(x) = begin if x == zero(x) return 0 end vx …

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## [How to save optimiser state and the model of CGAN?](https://discourse.julialang.org/t/how-to-save-optimiser-state-and-the-model-of-cgan/67232)

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**Author:** [@extremety1989](https://discourse.julialang.org/u/extremety1989)\
**Replies:** 0\
**Last updated:** [August 28, 2021, 4:07pm UTC](https://discourse.julialang.org/t/how-to-save-optimiser-state-and-the-model-of-cgan/67232 "2021-08-28T16:07:22Z")

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link : https://github.com/FluxML/model-zoo/blob/master/vision/cdcgan\_mnist/cGAN\_mnist.jl i tried inside training loop: @save "gen-model-$(now()).bson" gen opt\_gen @save "dscr-model-$(now()).bson" dscr opt\_dscr ERROR: L…

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