This function is predominantly intended to be used within the ffs routines in the migest package.
birth_mat(b_por = NULL, m2 = NULL, non_negative = TRUE)Vector of numeric values for births in each place of residence
Matrix of migrant stock totals at time t+1. Rows in the matrix correspond to place of birth and columns to place of residence at time t+1.
Adjust birth matrix calculation to ensure all deductions from m2 will result in positive population counts. On rare occasions when working with international stock data the number of births can exceed the increase in the number of native born population.
Matrix of place of birth by place of residence for new-born<U+2019>s