Estimation of life expectancy and
Life Years Lost (LYL, or lillies for short) for a given population, for
example those with a given disease or condition. In addition, the package
can be used to compare estimates from different populations, or to estimate
confidence intervals. Technical details of the method are available in
Plana-Ripoll et al. (2020) <doi:10.1371/journal.pone.0228073> and Andersen
(2017) <doi:10.1002/sim.7357>.

Karline Soetaert <k.soetaert@nioo.knaw.nl>,
Karel Van den Meersche <k.vdMeersche@nioo.knaw.nl>,
Dick van Oevelen <d.vanoevelen@nioo.knaw.nl>
Functions that (1.) Find the minimum/maximum of a linear or quadratic function:
min or max (f(x)), where f(x) = ||Ax-b||^2 or f(x) = sum(ai*xi)
subject to equality constraints Ex=f and/or inequality constraints Gx>=h.
(2.) Sample an underdetermined- or overdetermined system Ex=f subject to Gx>=h, and if applicable Ax~=b.
(3.) Solve a linear system Ax=B for the unknown x. Includes banded and tridiagonal linear systems.
The package calls Fortran functions from LINPACK

Karline Soetaert <k.soetaert@nioo.knaw.nl>, Karel Van den
Meersche <k.vdMeersche@nioo.knaw.nl>, Dick van Oevelen
<d.vanoevelen@nioo.knaw.nl>
Functions that (1.) Find the minimum/maximum of a linear
or quadratic function: min or max (f(x)), where f(x) =
||Ax-b||^2 or f(x) = sum(ai*xi) subject to equality constraints
Ex=f and/or inequality constraints Gx>=h. (2.) Sample an
underdetermined- or overdetermined system Ex=f subject to
Gx>=h, and if applicable Ax~=b. (3.) Solve a linear system Ax=B
for the unknown x. Includes banded and tridiagonal linear
systems. The package calls Fortran functions from LINPACK

Karline Soetaert <karline.soetaert@nioz.nl>, Karel Van den
Meersche <k.vdMeersche@nioo.knaw.nl>, Dick van Oevelen
<dick.vanoevelen@nioz.nl>
Functions that (1.) Find the minimum/maximum of a linear
or quadratic function: min or max (f(x)), where f(x) =
||Ax-b||^2 or f(x) = sum(ai*xi) subject to equality constraints
Ex=f and/or inequality constraints Gx>=h.  (2.) Sample an
underdetermined- or overdetermined system Ex=f subject to
Gx>=h, and if applicable Ax~=b.  (3.) Solve a linear system
Ax=B for the unknown x. Includes banded and tridiagonal linear
systems.  The package calls Fortran functions from LINPACK