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Figure 2 | BMC Systems Biology

Figure 2

From: Network topology-based detection of differential gene regulation and regulatory switches in cell metabolism and signaling

Figure 2

Schematic representation of the Haar wavelet transformation. (A, B) Representation of a local (high frequency) change in an expression pattern that is (A) not detected by low pass filters (here, 1st feature; mean of means) but (B) detected by high pass filters (here, 3rd feature; mean of differences). (C) Step-wise reduction of the resolution by averaging (1st feature) of 2 × 2 sections.

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