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2 hours ago by

I think that the axis of a PCA plot represents the distances between samples - the larger the difference, the larger the scale will be.

Does the location of the samples relative to zero matter?Is there a larger difference between two samples, located at 5 , -5 on one of the axis, than between another two samples located at 5, 15?

For example, can one say that samples 1 and 3 are more dissimilar than 2 and 4 in the plot below?
enter image description here

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Sam120



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