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. 2012 May 1;7(5):e35977. doi: 10.1371/journal.pone.0035977

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Gonçalves et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Illustrative example of discretization and alphabet transformation for a time series gene expression matrix: (left) original expression matrix M'; (center) discretized matrix M, obtained by applying a discretization based on transitions between time points to the original matrix M' using a three-symbol alphabet [28]; and (right) matrix M after the alphabet transformation that appends the column number to every symbol in the matrix.

Inline graphic — Illustrative example of discretization and alphabet transformation for a time series gene expression matrix: (left) original expression matrix M'; (center) discretized matrix M, obtained by applying a discretization based on transitions between time points to the original matrix M' using a three-symbol alphabet [28]; and (right) matrix M after the alphabet transformation that appends the column number to every symbol in the matrix.