Convert GitHub issues to a markdown file
The Python package mattduck/gh2md exports Github repository issues and pull requests to a single, readable markdown file.
Portal¶
PyPlot.jl tips
Some tips about JuliaPy/PyPlot.jl, the matplotlib (Python) visualization library for Julia. See also docs for matplotlib since PyPlot.jl largely follows matplotlib's API.
Force display format to PNG
In the VSCode plot panel and fredrikekre/Literate.jl notebooks, PNG images are generally smaller than SVG ones. To force plots to be shown as PNG images, you can use tkf/DisplayAs.jl to show objects in a chosen MIME type.
Get the ODE Function from an ODE system
f = ODEFunction(sys) could be useful in plotting vector fields.
Convert linear index to 2D indices
Use CartesianIndices((nrow, ncol)) 1.
Plots.jl Tips
Some tips about Plots.jl, the de-facto standard visualization library in Julia.
Windows subsystem for Linux 2 (WSL2)
Set up Windows subsystem for Linux 2 (WSL2) for Linux development experience in Windows 10 and 11.
Instal WSL2
Open powershell with administrator privilege, run the following command in the host.
or install the components manually
dism.exe /online /enable-feature /featurename:Microsoft-Windows-Subsystem-Linux /all /norestart
dism.exe /online /enable-feature /featurename:VirtualMachinePlatform /all /norestart
After reboot, install the Linux distribution
WSL2 post-install (optional) setup
Backup/move the virtual disk
If you want to move the WSL virtual disk file to another disk (in this example, D:\), run the following commands in Windows12:
wsl --export Ubuntu .\Ubuntu\ext4.tar
wsl --unregister Ubuntu
wsl --import Ubuntu D:\Ubuntu\ .\Ubuntu\ext4.tar
Default login user
Edit /etc/wsl.conf in the WSL. You may need to set the default user if you have moved the virtual disk file of the WSL distribution.
Host settings
Edit .wslconfig 3 in your Windows home directory (%USERPROFILE%).
For example,
.wslconfig
[wsl2]
memory=20GB # How much memory to assign to the WSL2 VM.
swap=8GB # How much swap space to add to the WSL2 VM. 0 for no swap file.
swapfile=C:\\temp\\wsl-swap.vhdx # Sets swap file path location, default is %USERPROFILE%\AppData\Local\Temp\swap.vhdx. Useful if your C drive has limited disk space.
Auto reclaim RAM and disk space
Edit .wslconfig 3 in your Windows home directory (%USERPROFILE%). 4
.wslconfig
[experimental]
autoMemoryReclaim=gradual # Reclaim RAM usage
sparseVhd=true # Reclaim virtual disk (vhd) usage
Maintenance
Update kernel
To (manually) update the WSL kernel, run the following commands with administrator privileges:
Reclaim virtual disk space
Optimize-VHD
Note
Optimize-VHD is not available in Windows Home edition.
To reclaim disk space from virtual hard disks (VHDs), run the following commands with administrator privileges 5:
Export and re-import
Alternatively, export the VHD as a tar file and reimport it again.
Caveats about WSL2
Poor filesystem performance across OSes
Cross-OS file access (e.g., accessing /mnt/c in WSL) is at least one order of magnitude (10x) slower than accessing natively (/home/user/).6
-
https://learn.microsoft.com/zh-tw/windows/wsl/basic-commands#import-and-export-a-distribution ↩
-
https://devblogs.microsoft.com/commandline/windows-subsystem-for-linux-september-2023-update/ ↩
-
https://blog.miniasp.com/post/2023/05/14/Shrink-your-WSL2-Virtual-Disks-and-Docker-Images-and-Reclaim-Disk-Space ↩
Check battery status
Open Windows Powershell with Administrator rights and run:
See the report at C:\battery-report.html.