module example5_model !! Model for example5. use odrpack_kinds, only: wp implicit none contains pure subroutine fcn(beta, xplusd, ifixb, ifixx, ideval, f, fjacb, fjacd, istop) !! User-supplied subroutine for evaluating the model. integer, intent(in) :: ideval, ifixb(:), ifixx(:, :) real(kind=wp), intent(in) :: beta(:), xplusd(:, :) real(kind=wp), intent(out) :: f(:, :), fjacb(:, :, :), fjacd(:, :, :) integer, intent(out) :: istop istop = 0 ! Calculate model if (mod(ideval, 10) /= 0) then f(:, 1) = beta(1)*exp(beta(2)*xplusd(:, 1)) end if ! Calculate model partials with respect to `beta` if (mod(ideval/10, 10) /= 0) then fjacb(:, 1, 1) = exp(beta(2)*xplusd(:, 1)) fjacb(:, 2, 1) = beta(1)*xplusd(:, 1)*exp(beta(2)*xplusd(:, 1)) end if ! Calculate model partials with respect to `delta` if (mod(ideval/100, 10) /= 0) then fjacd(:, 1, 1) = beta(1)*beta(2)*exp(beta(2)*xplusd(:, 1)) end if end subroutine fcn end module example5_model program example5 !! Explicit ODR job, with parameter bounds, user-supplied derivatives, and output of work !! arrays. use odrpack_kinds, only: wp use odrpack, only: odr, workspace_dimensions use example5_model, only: fcn implicit none real(kind=wp), allocatable :: beta(:), lower(:), upper(:), x(:, :), y(:, :), rwork(:) integer, allocatable :: iwork(:) integer :: np, n, m, q, job integer :: lrwork, liwork !, i job = 20 np = 2 n = 4 m = 1 q = 1 allocate (beta(np), lower(np), upper(np), x(n, m), y(n, q)) beta(1:2) = [2.0_wp, 0.5_wp] lower(1:2) = [0.0_wp, 0.0_wp] upper(1:2) = [10.0_wp, 0.9_wp] x(1:4, 1) = [0.982_wp, 1.998_wp, 4.978_wp, 6.01_wp] y(1:4, 1) = [2.7_wp, 7.4_wp, 148.0_wp, 403.0_wp] ! Manual allocation of work arrays ! Not required! Just to show it can be done if so desired call workspace_dimensions(n, m, q, np, .true., lrwork, liwork) allocate (iwork(liwork)) allocate (rwork(lrwork)) call odr(fcn, n, m, q, np, beta, y, x, & lower=lower, upper=upper, & job=job, iwork=iwork, rwork=rwork) ! Remove the comments to print out 'iwork' ! print *, "iwork" ! do i=1, size(iwork) ! print *, i, iwork(i) ! end do end program example5