Kamil Krzyk
Senior Data Scientist at Oanda
Expertise: Data science
Education: AGH University of Science and Technology

Kamil Krzyk is a senior data scientist with OANDA. He’s worked as a data scientist, machine learning engineer and full stack engineer since 2015.

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Cost Function of Linear Regression: Deep Learning for Beginners
A cost function in machine learning quantifies the error between a model’s predicted values and actual values, letting us measure how well a model's parameters fit given data. I’ll introduce you to two often-used regression cost functions: MAE and MSE.