Skip to main content
. Author manuscript; available in PMC: 2016 May 1.
Published in final edited form as: J Struct Biol. 2015 Mar 31;190(2):200–214. doi: 10.1016/j.jsb.2015.03.009

Fig. 9.

Fig. 9

Scree tests for different sets of images from the real data experiment. For each image set, PCA was performed on the original images represented in the spatial and Fourier domains. In addition, PCA was performed on the images limited to 12 Å and 20 Å resolution, represented in Fourier space. The filled circles on the eigenvalue plots denote the calculated subspace dimensions using t = 0.0001. The plots for the spatial and Fourier versions of each image set are identical, while the plots for the limited resolution images compared to the original images show a small change. (A) Scree tests for projections of the initial structure. Because the initial structure is low-pass filtered at 60 Å, the plots and calculated dimensions are identical for each case. (B) Scree tests for projections from the last iteration of SubspaceEM-2x. (C) Scree tests for the particle images.