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Figure 4
(a) The powder patterns for the 13 commercial aspirin samples partitioned into five sets; patterns 7 and 8 form singleton clusters. (b) The corresponding MMDS plot; patterns 7 and 8 are relatively close, and the question is posed as to whether they form a cluster together? (c) The dendrogram cut level is adjusted so that this takes place. (d) The superposition of the powder diffraction patterns of samples 7 (blue) and 8 (red).

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 37| Part 6| November 2004| Pages 874-882
doi:10.1107/S0021889804020990
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