Migration matrix

Help and Getting Started
1

Hello
Taking into account the example of the zika tutorial I have the following doubt
in the migration matrix file it is assumed that the rows indicate the place of departure and the columns the place of arrival, and the sum of the values of each row is equal to 1

But for the Zika example, the sum of 1 per row is not true. Is there an error in the result or am I parsing it incorrectly?

Map from character to field name
A: North America
B: Oceania
C: South America
D: Southeast Asia
E: ?

Substitution rate (mu): 97.422118

Equilibrium frequencies (pi_i):
A: 0.3149
B: 0.2451
C: 0.2159
D: 0.2241

Symmetrized rates from j->i (W_ij):
A B C D
A 0 0.8828 2.7937 0.8633
B 0.8828 0 1.2785 1.3023
C 2.7937 1.2785 0 0.8635
D 0.8633 1.3023 0.8635 0

Actual rates from j->i (Q_ij):
A B C D
A 0 0.278 0.8798 0.2719
B 0.2164 0 0.3133 0.3192
C 0.6033 0.2761 0 0.1865
D 0.1934 0.2918 0.1935 0

2

I’m not quite sure I understand your question.

Where did you read this?

in the migration matrix file it is assumed that the rows indicate the place of departure and the columns the place of arrival, and the sum of the values of each row is equal to 1

The equilibrium frequencies sum to 1:

>>> A= 0.3149
>>> B= 0.2451
>>> C= 0.2159
>>> D= 0.2241
>>> A+B+C+D
1.0

I don’t see any mention of matrix rows and columns necessarily summing to 1?

Here are some relevant treetime docs:
https://treetime.readthedocs.io/en/latest/tutorials/timetree.html
https://treetime.readthedocs.io/en/latest/tutorials/mugration.html