## Sonagram similarity matrix

How Eanalysis compute the similarity matrix?

To add a new similarity matrix of sonagram, select button (bottom left):

Select **Sonogram view** and the template **Similarity matrix**.

A similarity matrix of sonogram is added at top. Open property panel (**Property** toolbar button), select the first tab and select **Edit** button next to **Similarity sonogram**:

You can change parameters:

- Computation parameters (when you change these parameters, EAnalysis needs to compute the matrix an other time):
**Unit duration** contains the minimum unit duration in minutes:seconds:hundredth. A short duration is better but needs a high CPU.
**Frequency bands**: number of frequency bands uses for computation.
**Compute** the matrix when previous parameters are changed.

**Color**: use sonogram presets or edit your own color.