This page consists of a collection of numerous miscellaneous articles/tutorials that I have taught over the years.
GEM Summer 2022 Tutorial on Spherical Harmonics
I was invited to give a 15-minute tutorial on using Spherical harmonics to fit data. I have written up a notebook on:
- Using Lasso as a sparse fitting method to recover Fourier coefficients of a 1-D array.
- Using Lasso as a sparse fitting method to recover the Spherical harmonic coefficients of a 2-D field.
- Performing cross validation to fix the hyperparameters.
The tutorial is made available here , but if you want to just go online and work on the notebook, you can open it in Colab here: https://gist.github.com/Vishal-Upendran/8b5b7b5bea62c27f6a7426a6228cdb25.
IUCAA Summer school 2021
In the first week of June 2021, I gave a set of two lectures to the students of IUCAA Summer School and the Teacher’s Refresher course. These were two - lectures of one and half hour each providing an Introduction to python for astronomy, and an Introduction to Machine learning. These two lectures may be found on Youtube:
Intro to python & Machine learning.
For folks who don’t want to see an ~1.5 hour video, the tutorial is put up as a set of pages here: Intro to python and Machine learning