What is the difference between log2 ratio and log 2 fold?

08 August 2018 0 5K Report

Hi sorry I am totally new to data analysis and I see Log2 FC and Log2 Ratio often being used interchangeably, but they mean the same thing. I see Log2 FC more often used. However, is it more correct to use the term log2 ratio? Because to log2 transform FC data, it is not possible for negative FC values. Please correct me if I am wrong. Thank you for the clarification.

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