Created
July 30, 2026 15:13
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ag_calibrate.R
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| calibrate <- function(pm, rh) { | |
| if (pm < 30) { | |
| return(max(0.0, (0.524 * pm) - (0.0862 * rh) + 5.75)) | |
| } | |
| if (pm < 50) { | |
| return(max( | |
| 0.0, | |
| (0.786 * (pm / 20 - (3 / 2)) + 0.524 * (1 - (pm / 20 - (3 / 2)))) * pm | |
| - (0.0862 * rh) | |
| + 5.75 | |
| )) | |
| } | |
| if (pm < 210) { | |
| return(max(0.0, (0.786 * pm) - (0.0862 * rh) + 5.75)) | |
| } | |
| if (pm < 260) { | |
| return(max( | |
| 0.0, | |
| (0.69 * (pm / 50 - 21 / 5) + 0.786 * (1 - (pm / 50 - (21 / 5)))) * pm | |
| - (0.0862 * rh * (1 - (pm / 50 - (21 / 5)))) | |
| + (2.966 * (pm / 50 - (21 / 5))) | |
| + (5.75 * (1 - (pm / 50 - (21 / 5)))) | |
| + (8.84e-4 * (pm^2) * (pm / 50 - (21 / 5))) | |
| )) | |
| } | |
| return(max(0.0, 2.966 + (0.69 * pm) + (8.84e-4 * (pm^2)))) | |
| } |
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