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A Principal Component Analysis of 39 Scientific Impact Measures

Figure 2

Correlations between 37 measures mapped onto first two principal components (cumulative variance = 83.4%) of PCA.

Black dots indicate citation-based measures. White dots indicate usage-based measures. The Journal Impact Factor (5) has a blue lining. Measures 23 and 39 excluded.

Figure 2

doi: https://doi.org/10.1371/journal.pone.0006022.g002