# \#catlab

**URL:** https://discourse.julialang.org/tag/catlab/900.md

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## [How to use Catlab, WiringDiagrams for my explicit purpose?](https://discourse.julialang.org/t/how-to-use-catlab-wiringdiagrams-for-my-explicit-purpose/101172)

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**Author:** [@Tillmann\_Bosch](https://discourse.julialang.org/u/Tillmann_Bosch)\
**Replies:** 2\
**Last updated:** [July 27, 2023, 9:49am UTC](https://discourse.julialang.org/t/how-to-use-catlab-wiringdiagrams-for-my-explicit-purpose/101172 "2023-07-27T09:49:52Z")

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Hey there! I want to build a little framework to model calculation flows. The image I appended shows an example of a renuve and costs calculation, which finally calculates some profit. Structurally this is a direct…

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## [How do I associate a math operation with node of wiring diagram?](https://discourse.julialang.org/t/how-do-i-associate-a-math-operation-with-node-of-wiring-diagram/101503)

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**Author:** [@nikit\_goku](https://discourse.julialang.org/u/nikit_goku)\
**Replies:** 0\
**Last updated:** [July 12, 2023, 12:54am UTC](https://discourse.julialang.org/t/how-do-i-associate-a-math-operation-with-node-of-wiring-diagram/101503 "2023-07-12T00:54:59Z")

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Hello, I am trying to associate a mathematical operation with the node of the wiring diagram, for example I may want to pass an integer as an input, and want take a square root of that integer and return the value at the…

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## [Catlab.jl : Facing error while creating simple graphs](https://discourse.julialang.org/t/catlab-jl-facing-error-while-creating-simple-graphs/100415)

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**Author:** [@nikit\_goku](https://discourse.julialang.org/u/nikit_goku)\
**Replies:** 5\
**Last updated:** [June 16, 2023, 4:15pm UTC](https://discourse.julialang.org/t/catlab-jl-facing-error-while-creating-simple-graphs/100415 "2023-06-16T16:15:23Z")

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I was following the AlgebraicJulia blog for Graphs and C-sets where I am encountering an IOError for the ‘dot -Tsvg’ file missing when trying to generate graph interface using the 'to\_graphviz() function. I could not deb…

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## [\[ANN\] C3T - Crash Course Category Theory 🐱](https://discourse.julialang.org/t/ann-c3t-crash-course-category-theory/73392)

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**Author:** [@TheCedarPrince](https://discourse.julialang.org/u/TheCedarPrince)\
**Replies:** 4\
**Last updated:** [February 28, 2022, 2:40am UTC](https://discourse.julialang.org/t/ann-c3t-crash-course-category-theory/73392 "2022-02-28T02:40:50Z")

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Hi all! I have been in the process of creating a Crash Course Category Theory website called C3T which utilizes Julia, Julia Markdown, KaTeX, Franklin.jl, Weave.jl, mermaid.js, and some Haskell! This is designed to …