Dynamic Model — dynamic_model • ChillModels

Quantifies the chill accumulation with dynamic equation (two-steps).

dynamic_model(x, total = TRUE)

Arguments

x	Vector containing temperature values (Celsius-degree).
total	TRUE Shows the total value of accumulation, FALSE shows the value of chill for each temperature (TRUE is default).

Value

The function returns values the chill for each temperature of vector (Total = FALSE), or returns the chill accumulation (Total = TRUE).

Details

The model is based on dynamic accumulation, by means of the relationship between temperatures. The dynamic model assumes that the accumulated chill-units are not annulled by high temperatures.

Note

Code adapted from the function Dynamic_Model, of the chillR Package

References

FISHMAN, Svetlana, EREZ, A. & COUVILLON, G. A. (1987). The Temperature Dependence of Dormancy Breaking in Plants: Computer Simulation of Processes Studied Under Controlled Temperatures. J. Theor. Biol.

LUEDELING, Eike (2018). chillR: Statistical Methods for Phenology Analysis in Temperate Fruit Trees. R package version 0.70.12. https://CRAN.R-project.org/package=chillR

Examples


x <- rnorm(500, 10, 5)
dynamic_model(x)
#> [1] 8.196734
dynamic_model(x, FALSE)
#>   [1] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#>   [6] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#>  [11] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#>  [16] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#>  [21] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#>  [26] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#>  [31] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#>  [36] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#>  [41] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#>  [46] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#>  [51] 0.0000000000 0.0000000000 0.0000000000 1.0072060687 0.0000000000
#>  [56] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#>  [61] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#>  [66] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#>  [71] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#>  [76] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#>  [81] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#>  [86] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#>  [91] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#>  [96] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [101] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0001293652
#> [106] 1.0404826518 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [111] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [116] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [121] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [126] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [131] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [136] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [141] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [146] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [151] 0.0000000000 0.0000000000 0.0070293207 1.0087153272 0.0000000000
#> [156] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [161] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [166] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [171] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [176] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [181] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [186] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [191] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [196] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [201] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [206] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [211] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [216] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [221] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [226] 0.0000000000 0.0000000000 0.0000000000 0.9183990611 0.0000000000
#> [231] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [236] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [241] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [246] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [251] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [256] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [261] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [266] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [271] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [276] 0.0000000000 0.2054873070 0.0000000000 0.0000000000 0.0000000000
#> [281] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [286] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 1.0051668102
#> [291] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [296] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [301] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [306] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [311] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [316] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [321] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [326] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [331] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [336] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [341] 0.9846520845 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [346] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [351] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [356] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [361] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [366] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [371] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [376] 0.0000000000 0.0000000000 1.0063422802 0.0000000000 0.0000000000
#> [381] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [386] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [391] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [396] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [401] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [406] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [411] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [416] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [421] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [426] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 1.0131232898
#> [431] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [436] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [441] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [446] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [451] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [456] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [461] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [466] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [471] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [476] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [481] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [486] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [491] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000
#> [496] 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000