Figure 4. Low-dimensional coordinates in a non-linear dimensional projection of all 14,397,437 SNPs of 179 individuals from three populations mapped by the LLE where the X axis is the individual index and the Y axis is the eigenvalue arranged from large to small.

The color of the pixel at (X, Y) is the value of the eigenvector corresponding to eigenvalue at Y for individual X . Green color represents negative values, red color represents positive values and white color represents values close to zero.