Herman Sletmoen

Plot Symmetric matrix

2

## Details ```julia using Plots, LinearAlgebra heatmap(Symmetric(zeros(5, 5))) ``` ``` ERROR: ArgumentError: Cannot set a non-diagonal index in a symmetric matrix Stacktrace: [1] setindex! @ ~/.julia/juliaup/julia-1.11.6+0.x64.linux.gnu/share/julia/stdlib/v1.11/LinearAlgebra/src/symmetric.jl:258 [inlined] [2] _setindex! @...

Automated sparse analytical example broken

7

https://docs.sciml.ai/ModelingToolkit/dev/examples/sparse_jacobians/ - [ ] `Warning: Did not converge after maxiters = 0 substitutions. Either there is a cycle in the rules or maxiters needs to be higher.` - [ ]...

What does "variable was actually zero" internal error mean when using ifelse?

3

I am using `ifelse` in an ODE like this: ```julia using ModelingToolkit, OrdinaryDiffEq using ModelingToolkit: t_nounits as t, D_nounits as D @variables x(t) # position eqs = [D(D(x)) ~ ifelse(x...

CAMB and CLASS disagree on lensing-polarization cross spectrum

7

Hi! I am unable to make CAMB and CLASS to agree on $C_l$ for lensing-polarization with default-ish precision parameters. Here is a script to reproduce my comparison (run in an...

Cannot disable Jacobian sparsity pattern checking

1

I want to solve an ODE with an implicit solver and sparse Jacobian. [LinearSolve docs](https://docs.sciml.ai/LinearSolve/stable/solvers/solvers/#LinearSolve.KLUFactorization) hint at setting `check_pattern = false` for a speedup if the sparsity pattern is constant....