Scaled and unscaled G25 coordinates?

[Narration]

What is the difference between scaled and unscaled G25 coordinates?

[ScandinavianCelt]

What is the difference between scaled and unscaled G25 coordinates?

DNAGenics answers your question this way:

The original data from the PCA are called "unscaled" coordinates. We can adjust these numbers to make some parts more important, based on their significance (Eigen value). This process is called scaling and it makes some tasks easier by reducing the impact of less important parts.

However, these less important parts can still be useful for telling different groups apart, like Siberians from Amerindians or different African populations. So, it's important to use the right method for the specific task.