My work published without my name. Need your advice

This is probably something that has been discussed a lot. However, I want to share my story and get your feedback.

A few years ago, I was part of an unofficial research group. No contracts or any type of payment was involved. The lead of the group was a university professor.

During that period, a colleague and I worked on a project with a case study of a prediction model. My colleague did the machine learning model and I designed …

advice datascience feedback part payment professor research something story type university work