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I'm starting to hate the zed editor! Messups fixed, all tests again pass.

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Simon Brooke 2026-08-11 18:13:20 +01:00
parent be68481d06
commit 37689df3e2
2 changed files with 15 additions and 12 deletions
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23
src/humidity/relative.clj
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@ -1,7 +1,7 @@
(ns ^{:authority "https://journals.ametsoc.org/view/journals/apme/35/4/1520-0450_1996_035_0601_imfaos_2_0_co_2.xml/"
:author "simon"
:doc "Function to return relative humidity."} humidity.relative
(:require [humidity.constants :refer [celsius-offset e Rw]]
(:require [humidity.constants :refer [e Rw]]
[humidity.utils :refer [expt]]))
(def ^:const magic-numbers
@ -44,12 +44,15 @@
(defn rel-humidity
"Returns relative humidity (as a percentage, 0...100) given values for dew
point and temperature in Celsius or for absolute humidity, saturation vapour pressure temperature Kelvin."
[& {:keys [absolute-humidity dew-point saturation-vapour-pressure temperature-ke temperature-kelvin] :as packet}]
(cond (and dew-point temperature-ke)
(* 100 (/ (expt e (/ (* (C 1) dew-point)
(+ (C 2) dew-point)))
(expt e (/ (* (C 1) temperature-ke)
(+ (C 2) temperature-ke)))))
(and absolute-humidity saturation-vapour-pressure temperature-kelvin)
(/ (* absolute-humidity temperature-kelvin Rw) (* 1000 saturation-vapour-pressure))))
point and temperature in Celsius or for absolute humidity, saturation
vapour pressure, temperature in Kelvin."
[& {:keys [absolute-humidity dew-point saturation-vapour-pressure
temperature-celsius temperature-kelvin]}]
(cond (and dew-point temperature-celsius)
(* 100 (/ (expt e (/ (* (C 1) dew-point)
(+ (C 2) dew-point)))
(expt e (/ (* (C 1) temperature-celsius)
(+ (C 2) temperature-celsius)))))
(and absolute-humidity saturation-vapour-pressure temperature-kelvin)
(/ (* absolute-humidity temperature-kelvin Rw)
(* 1000 saturation-vapour-pressure))))

4
test/humidity/relative_test.clj
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@ -1,13 +1,13 @@
(ns humidity.relative-test
(:require [clojure.test :refer [deftest is testing]]
[humidity.constants :refer [celsius-offset]]
[humidity.relative :refer [rel-humidity rel-humidity-2]]))
[humidity.relative :refer [rel-humidity rel-humidity]]))
(deftest relative-humidity-test
(testing "definitional"
(let [min-expected 99
max-expected 101
actual (rel-humidity-2 :absolute-humidity 39.58 :saturation-vapour-pressure 5622.49 :temperature-kelvin (+ 35 celsius-offset))]
actual (rel-humidity :absolute-humidity 3953.618 :saturation-vapour-pressure 5622.49 :temperature-kelvin (+ 35 celsius-offset))]
(is (< min-expected actual max-expected))))
(testing "Online examples"
(let [min-expected 99