Data Validation Pipelines

Range Clamp

Keep Values Inside Bounds

Validation pipelines often bound values before the next calculation step. max and min make that clamp explicit.

Program

Play the program to choose the upper bound and see which readings are clipped.

range_clamp.f90 
program range_clamp_demo
    implicit none
    integer :: raw(4)
    integer :: lower_bound
    integer :: upper_bound
    integer :: clipped(4)
    integer :: clipped_total

    raw = [-2, 4, 11, 15]
    lower_bound = 0
    upper_bound = 
    clipped = min(max(raw, lower_bound), upper_bound)
    clipped_total = sum(clipped)
    print '(I0, 1X, I0)', clipped(4), clipped_total
end program range_clamp_demo

program range_clamp_demo
    implicit none
    integer :: raw(4)
    integer :: lower_bound
    integer :: upper_bound
    integer :: clipped(4)
    integer :: clipped_total

    raw = [-2, 4, 11, 15]
    lower_bound = 0
    upper_bound = 
    clipped = min(max(raw, lower_bound), upper_bound)
    clipped_total = sum(clipped)
    print '(I0, 1X, I0)', clipped(4), clipped_total
end program range_clamp_demo

program range_clamp_demo
    implicit none
    integer :: raw(4)
    integer :: lower_bound
    integer :: upper_bound
    integer :: clipped(4)
    integer :: clipped_total

    raw = [-2, 4, 11, 15]
    lower_bound = 0
    upper_bound = 
    clipped = min(max(raw, lower_bound), upper_bound)
    clipped_total = sum(clipped)
    print '(I0, 1X, I0)', clipped(4), clipped_total
end program range_clamp_demo
bounds Lower and upper bounds define the accepted numeric interval.
elemental max/min `max` and `min` apply element by element to the array.
clipped total A summary after clamping can be compared across bound choices.