Imogen's Maths A Tutor Group

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How to fix the following error in NextFlow:

WARN: Failed to render DAG file:

This error prevents NextFlow from drawing the DAG for the pipeline.

#install Graphviz 
#eg. with conda
conda install -c conda-forge graphviz

How to use your phone as a webcam:

https://www.youtube.com/watch?v=ArVDKf2QK1s

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How to install ubuntu on windows:

1. Follow the instructions at:
   https://s1gr1d.medium.com/how-to-set-up-linux-on-windows-with-wsl-2-debe2a64d20d
   (NB. these instructions work for Windows 10 and 11 although the location of the Settings menus may differ slightly. Also note that VMX is the same as VT-X in the BIOS settings)
2. In Windows Powershell, you may also need to issue the following commands:

bcdedit /set hypervisorlaunchtype Auto
wsl --update

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What is the cause of the following error when trying to run a NextFlow script:

illegal string body character after dollar sign;
   solution: either escape a literal dollar sign "\$5" or bracket the value expression "${5}" @ line 3170, column 43.

This error occurs when you forget to escape a $ sign in a script block.