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| author | Marius Peter <dev@marius-peter.com> | 2025-11-17 12:13:03 +0100 |
|---|---|---|
| committer | Marius Peter <dev@marius-peter.com> | 2025-11-17 12:13:03 +0100 |
| commit | 3d4859c18ec3c96f6cbc1c18808d598f0eb45889 (patch) | |
| tree | a9d32518d83b8912be33e11c34e12c324f130866 /services | |
| parent | 37327a632ff1584e7442295b1ed2ec788a175e4b (diff) | |
Fix nnls logic.
If no latest target exists, the deficit is zero (no target, no
problem).
Diffstat (limited to 'services')
| -rw-r--r-- | services/nnls.rkt | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/services/nnls.rkt b/services/nnls.rkt index 52afbad..649d416 100644 --- a/services/nnls.rkt +++ b/services/nnls.rkt @@ -26,17 +26,16 @@ (define latest-target (get-latest-nutrient-target-value n)) (define deficit (cond + [(false? latest-target) + 0] [(or (false? latest-measurement) (zero? latest-measurement)) latest-target] - [(false? latest-target) - 0] [(and (number? latest-measurement) (number? latest-target)) (* 100 (/ (- latest-target latest-measurement) - latest-measurement))] - [else (error "either the target or measurement are not numbers")])) + latest-measurement))])) deficit))) (define error-threshold 10e-4) (lawson-hanson-1974 fertilizer-product-matrix deficits error-threshold)) |